Fixed #13252 -- Added ability to serialize with natural primary keys.
Added ``--natural-foreign`` and ``--natural-primary`` options and deprecated the ``--natural`` option to the ``dumpdata`` management command. Added ``use_natural_foreign_keys`` and ``use_natural_primary_keys`` arguments and deprecated the ``use_natural_keys`` argument to ``django.core.serializers.Serializer.serialize()``. Thanks SmileyChris for the suggestion.
This commit is contained in:
Tai Lee
Tim Graham
parent
945e033a69
commit
e527c0b6d8
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@ -1,3 +1,5 @@
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import warnings
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from collections import OrderedDict
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from optparse import make_option
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@ -20,6 +22,10 @@ class Command(BaseCommand):
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help='An appname or appname.ModelName to exclude (use multiple --exclude to exclude multiple apps/models).'),
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make_option('-n', '--natural', action='store_true', dest='use_natural_keys', default=False,
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help='Use natural keys if they are available.'),
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make_option('--natural-foreign', action='store_true', dest='use_natural_foreign_keys', default=False,
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help='Use natural foreign keys if they are available.'),
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make_option('--natural-primary', action='store_true', dest='use_natural_primary_keys', default=False,
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help='Use natural primary keys if they are available.'),
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make_option('-a', '--all', action='store_true', dest='use_base_manager', default=False,
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help="Use Django's base manager to dump all models stored in the database, including those that would otherwise be filtered or modified by a custom manager."),
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make_option('--pks', dest='primary_keys', help="Only dump objects with "
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@ -40,6 +46,11 @@ class Command(BaseCommand):
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excludes = options.get('exclude')
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show_traceback = options.get('traceback')
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use_natural_keys = options.get('use_natural_keys')
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if use_natural_keys:
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warnings.warn("``--natural`` is deprecated; use ``--natural-foreign`` instead.",
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PendingDeprecationWarning)
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use_natural_foreign_keys = options.get('use_natural_foreign_keys') or use_natural_keys
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use_natural_primary_keys = options.get('use_natural_primary_keys')
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use_base_manager = options.get('use_base_manager')
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pks = options.get('primary_keys')
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@ -133,7 +144,9 @@ class Command(BaseCommand):
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try:
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self.stdout.ending = None
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serializers.serialize(format, get_objects(), indent=indent,
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use_natural_keys=use_natural_keys, stream=self.stdout)
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use_natural_foreign_keys=use_natural_foreign_keys,
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use_natural_primary_keys=use_natural_primary_keys,
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stream=self.stdout)
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except Exception as e:
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if show_traceback:
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raise
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@ -1,6 +1,7 @@
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"""
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Module for abstract serializer/unserializer base classes.
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"""
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import warnings
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from django.db import models
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from django.utils import six
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@ -35,6 +36,11 @@ class Serializer(object):
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self.stream = options.pop("stream", six.StringIO())
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self.selected_fields = options.pop("fields", None)
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self.use_natural_keys = options.pop("use_natural_keys", False)
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if self.use_natural_keys:
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warnings.warn("``use_natural_keys`` is deprecated; use ``use_natural_foreign_keys`` instead.",
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PendingDeprecationWarning)
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self.use_natural_foreign_keys = options.pop('use_natural_foreign_keys', False) or self.use_natural_keys
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self.use_natural_primary_keys = options.pop('use_natural_primary_keys', False)
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self.start_serialization()
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self.first = True
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@ -169,3 +175,20 @@ class DeserializedObject(object):
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# prevent a second (possibly accidental) call to save() from saving
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# the m2m data twice.
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self.m2m_data = None
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def build_instance(Model, data, db):
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"""
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Build a model instance.
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If the model instance doesn't have a primary key and the model supports
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natural keys, try to retrieve it from the database.
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"""
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obj = Model(**data)
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if (obj.pk is None and hasattr(Model, 'natural_key') and
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hasattr(Model._default_manager, 'get_by_natural_key')):
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natural_key = obj.natural_key()
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try:
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obj.pk = Model._default_manager.db_manager(db).get_by_natural_key(*natural_key).pk
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except Model.DoesNotExist:
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pass
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return obj
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@ -34,11 +34,14 @@ class Serializer(base.Serializer):
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self._current = None
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def get_dump_object(self, obj):
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return {
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"pk": smart_text(obj._get_pk_val(), strings_only=True),
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data = {
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"model": smart_text(obj._meta),
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"fields": self._current
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"fields": self._current,
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}
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if not self.use_natural_primary_keys or not hasattr(obj, 'natural_key'):
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data["pk"] = smart_text(obj._get_pk_val(), strings_only=True)
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return data
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def handle_field(self, obj, field):
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value = field._get_val_from_obj(obj)
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@ -51,7 +54,7 @@ class Serializer(base.Serializer):
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self._current[field.name] = field.value_to_string(obj)
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def handle_fk_field(self, obj, field):
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if self.use_natural_keys and hasattr(field.rel.to, 'natural_key'):
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if self.use_natural_foreign_keys and hasattr(field.rel.to, 'natural_key'):
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related = getattr(obj, field.name)
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if related:
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value = related.natural_key()
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@ -63,7 +66,7 @@ class Serializer(base.Serializer):
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def handle_m2m_field(self, obj, field):
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if field.rel.through._meta.auto_created:
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if self.use_natural_keys and hasattr(field.rel.to, 'natural_key'):
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if self.use_natural_foreign_keys and hasattr(field.rel.to, 'natural_key'):
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m2m_value = lambda value: value.natural_key()
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else:
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m2m_value = lambda value: smart_text(value._get_pk_val(), strings_only=True)
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@ -88,7 +91,9 @@ def Deserializer(object_list, **options):
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for d in object_list:
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# Look up the model and starting build a dict of data for it.
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Model = _get_model(d["model"])
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data = {Model._meta.pk.attname: Model._meta.pk.to_python(d.get("pk", None))}
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data = {}
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if 'pk' in d:
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data[Model._meta.pk.attname] = Model._meta.pk.to_python(d.get("pk", None))
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m2m_data = {}
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model_fields = Model._meta.get_all_field_names()
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@ -139,7 +144,8 @@ def Deserializer(object_list, **options):
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else:
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data[field.name] = field.to_python(field_value)
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yield base.DeserializedObject(Model(**data), m2m_data)
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obj = base.build_instance(Model, data, db)
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yield base.DeserializedObject(obj, m2m_data)
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def _get_model(model_identifier):
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"""
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@ -46,14 +46,11 @@ class Serializer(base.Serializer):
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raise base.SerializationError("Non-model object (%s) encountered during serialization" % type(obj))
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self.indent(1)
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obj_pk = obj._get_pk_val()
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if obj_pk is None:
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attrs = {"model": smart_text(obj._meta),}
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else:
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attrs = {
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"pk": smart_text(obj._get_pk_val()),
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"model": smart_text(obj._meta),
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}
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attrs = {"model": smart_text(obj._meta)}
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if not self.use_natural_primary_keys or not hasattr(obj, 'natural_key'):
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obj_pk = obj._get_pk_val()
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if obj_pk is not None:
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attrs['pk'] = smart_text(obj_pk)
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self.xml.startElement("object", attrs)
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@ -91,7 +88,7 @@ class Serializer(base.Serializer):
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self._start_relational_field(field)
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related_att = getattr(obj, field.get_attname())
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if related_att is not None:
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if self.use_natural_keys and hasattr(field.rel.to, 'natural_key'):
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if self.use_natural_foreign_keys and hasattr(field.rel.to, 'natural_key'):
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related = getattr(obj, field.name)
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# If related object has a natural key, use it
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related = related.natural_key()
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@ -114,7 +111,7 @@ class Serializer(base.Serializer):
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"""
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if field.rel.through._meta.auto_created:
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self._start_relational_field(field)
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if self.use_natural_keys and hasattr(field.rel.to, 'natural_key'):
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if self.use_natural_foreign_keys and hasattr(field.rel.to, 'natural_key'):
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# If the objects in the m2m have a natural key, use it
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def handle_m2m(value):
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natural = value.natural_key()
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@ -177,13 +174,10 @@ class Deserializer(base.Deserializer):
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Model = self._get_model_from_node(node, "model")
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# Start building a data dictionary from the object.
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# If the node is missing the pk set it to None
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if node.hasAttribute("pk"):
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pk = node.getAttribute("pk")
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else:
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pk = None
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data = {Model._meta.pk.attname : Model._meta.pk.to_python(pk)}
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data = {}
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if node.hasAttribute('pk'):
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data[Model._meta.pk.attname] = Model._meta.pk.to_python(
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node.getAttribute('pk'))
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# Also start building a dict of m2m data (this is saved as
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# {m2m_accessor_attribute : [list_of_related_objects]})
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@ -217,8 +211,10 @@ class Deserializer(base.Deserializer):
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value = field.to_python(getInnerText(field_node).strip())
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data[field.name] = value
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obj = base.build_instance(Model, data, self.db)
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# Return a DeserializedObject so that the m2m data has a place to live.
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return base.DeserializedObject(Model(**data), m2m_data)
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return base.DeserializedObject(obj, m2m_data)
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def _handle_fk_field_node(self, node, field):
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"""
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@ -461,6 +461,12 @@ these changes.
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``BaseMemcachedCache._get_memcache_timeout()`` method to
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``get_backend_timeout()``.
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* The ``--natural`` and ``-n`` options for :djadmin:`dumpdata` will be removed.
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Use :djadminopt:`--natural-foreign` instead.
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* The ``use_natural_keys`` argument for ``serializers.serialize()`` will be
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removed. Use ``use_natural_foreign_keys`` instead.
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2.0
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---
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@ -220,13 +220,34 @@ also mix application names and model names.
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The :djadminopt:`--database` option can be used to specify the database
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from which data will be dumped.
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.. django-admin-option:: --natural-foreign
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.. versionadded:: 1.7
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When this option is specified, Django will use the ``natural_key()`` model
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method to serialize any foreign key and many-to-many relationship to objects of
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the type that defines the method. If you are dumping ``contrib.auth``
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``Permission`` objects or ``contrib.contenttypes`` ``ContentType`` objects, you
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should probably be using this flag. See the :ref:`natural keys
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<topics-serialization-natural-keys>` documentation for more details on this
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and the next option.
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.. django-admin-option:: --natural-primary
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.. versionadded:: 1.7
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When this option is specified, Django will not provide the primary key in the
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serialized data of this object since it can be calculated during
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deserialization.
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.. django-admin-option:: --natural
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.. deprecated:: 1.7
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Equivalent to the :djadminopt:`--natural-foreign` option; use that instead.
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Use :ref:`natural keys <topics-serialization-natural-keys>` to represent
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any foreign key and many-to-many relationship with a model that provides
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a natural key definition. If you are dumping ``contrib.auth`` ``Permission``
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objects or ``contrib.contenttypes`` ``ContentType`` objects, you should
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probably be using this flag.
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a natural key definition.
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.. versionadded:: 1.6
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@ -294,6 +294,11 @@ Management Commands
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* The :djadminopt:`--no-color` option for ``django-admin.py`` allows you to
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disable the colorization of management command output.
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* The new :djadminopt:`--natural-foreign` and :djadminopt:`--natural-primary`
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options for :djadmin:`dumpdata`, and the new ``use_natural_foreign_keys`` and
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``use_natural_primary_keys`` arguments for ``serializers.serialize()``, allow
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the use of natural primary keys when serializing.
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Models
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^^^^^^
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@ -588,3 +593,12 @@ The :class:`django.db.models.IPAddressField` and
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The ``BaseMemcachedCache._get_memcache_timeout()`` method has been renamed to
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``get_backend_timeout()``. Despite being a private API, it will go through the
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normal deprecation.
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Natural key serialization options
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The ``--natural`` and ``-n`` options for :djadmin:`dumpdata` have been
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deprecated. Use :djadminopt:`--natural-foreign` instead.
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Similarly, the ``use_natural_keys`` argument for ``serializers.serialize()``
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has been deprecated. Use ``use_natural_foreign_keys`` instead.
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@ -404,6 +404,12 @@ into the primary key of an actual ``Person`` object.
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fields will be effectively unique, you can still use those fields
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as a natural key.
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.. versionadded:: 1.7
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Deserialization of objects with no primary key will always check whether the
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model's manager has a ``get_by_natural_key()`` method and if so, use it to
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populate the deserialized object's primary key.
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Serialization of natural keys
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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@ -426,17 +432,39 @@ Firstly, you need to add another method -- this time to the model itself::
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That method should always return a natural key tuple -- in this
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example, ``(first name, last name)``. Then, when you call
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``serializers.serialize()``, you provide a ``use_natural_keys=True``
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argument::
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``serializers.serialize()``, you provide ``use_natural_foreign_keys=True``
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or ``use_natural_primary_keys=True`` arguments::
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>>> serializers.serialize('json', [book1, book2], indent=2, use_natural_keys=True)
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>>> serializers.serialize('json', [book1, book2], indent=2,
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... use_natural_foreign_keys=True, use_natural_primary_keys=True)
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When ``use_natural_keys=True`` is specified, Django will use the
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``natural_key()`` method to serialize any reference to objects of the
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type that defines the method.
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When ``use_natural_foreign_keys=True`` is specified, Django will use the
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``natural_key()`` method to serialize any foreign key reference to objects
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of the type that defines the method.
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If you are using :djadmin:`dumpdata` to generate serialized data, you
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use the :djadminopt:`--natural` command line flag to generate natural keys.
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When ``use_natural_primary_keys=True`` is specified, Django will not provide the
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primary key in the serialized data of this object since it can be calculated
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during deserialization::
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...
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{
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"model": "store.person",
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"fields": {
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"first_name": "Douglas",
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"last_name": "Adams",
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"birth_date": "1952-03-11",
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}
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}
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...
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This can be useful when you need to load serialized data into an existing
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database and you cannot guarantee that the serialized primary key value is not
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already in use, and do not need to ensure that deserialized objects retain the
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same primary keys.
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If you are using :djadmin:`dumpdata` to generate serialized data, use the
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:djadminopt:`--natural-foreign` and :djadminopt:`--natural-primary` command
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line flags to generate natural keys.
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.. note::
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@ -450,6 +478,19 @@ use the :djadminopt:`--natural` command line flag to generate natural keys.
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natural keys during serialization, but *not* be able to load those
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key values, just don't define the ``get_by_natural_key()`` method.
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.. versionchanged:: 1.7
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Previously there was only a ``use_natural_keys`` argument for
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``serializers.serialize()`` and the `-n` or `--natural` command line flags.
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These have been deprecated in favor of the ``use_natural_foreign_keys`` and
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``use_natural_primary_keys`` arguments and the corresponding
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:djadminopt:`--natural-foreign` and :djadminopt:`--natural-primary` options
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for :djadmin:`dumpdata`.
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The original argument and command line flags remain for backwards
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compatibility and map to the new ``use_natural_foreign_keys`` argument and
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`--natural-foreign` command line flag. They'll be removed in Django 1.9.
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Dependencies during serialization
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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@ -459,7 +500,7 @@ a "forward reference" with natural keys -- the data you're referencing
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must exist before you include a natural key reference to that data.
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To accommodate this limitation, calls to :djadmin:`dumpdata` that use
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the :djadminopt:`--natural` option will serialize any model with a
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the :djadminopt:`--natural-foreign` option will serialize any model with a
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``natural_key()`` method before serializing standard primary key objects.
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However, this may not always be enough. If your natural key refers to
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@ -37,13 +37,15 @@ class SubclassTestCaseFixtureLoadingTests(TestCaseFixtureLoadingTests):
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class DumpDataAssertMixin(object):
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def _dumpdata_assert(self, args, output, format='json', natural_keys=False,
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def _dumpdata_assert(self, args, output, format='json',
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natural_foreign_keys=False, natural_primary_keys=False,
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use_base_manager=False, exclude_list=[], primary_keys=''):
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new_io = six.StringIO()
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management.call_command('dumpdata', *args, **{'format': format,
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'stdout': new_io,
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'stderr': new_io,
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'use_natural_keys': natural_keys,
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'use_natural_foreign_keys': natural_foreign_keys,
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'use_natural_primary_keys': natural_primary_keys,
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'use_base_manager': use_base_manager,
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'exclude': exclude_list,
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'primary_keys': primary_keys})
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@ -175,14 +177,17 @@ class FixtureLoadingTests(DumpDataAssertMixin, TestCase):
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self._dumpdata_assert(['fixtures.book'], '[{"pk": 1, "model": "fixtures.book", "fields": {"name": "Music for all ages", "authors": [3, 1]}}, {"pk": 10, "model": "fixtures.book", "fields": {"name": "Achieving self-awareness of Python programs", "authors": []}}]')
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|
||||
# But you can get natural keys if you ask for them and they are available
|
||||
self._dumpdata_assert(['fixtures.book'], '[{"pk": 1, "model": "fixtures.book", "fields": {"name": "Music for all ages", "authors": [["Artist formerly known as \\"Prince\\""], ["Django Reinhardt"]]}}, {"pk": 10, "model": "fixtures.book", "fields": {"name": "Achieving self-awareness of Python programs", "authors": []}}]', natural_keys=True)
|
||||
self._dumpdata_assert(['fixtures.book'], '[{"pk": 1, "model": "fixtures.book", "fields": {"name": "Music for all ages", "authors": [["Artist formerly known as \\"Prince\\""], ["Django Reinhardt"]]}}, {"pk": 10, "model": "fixtures.book", "fields": {"name": "Achieving self-awareness of Python programs", "authors": []}}]', natural_foreign_keys=True)
|
||||
|
||||
# You can also omit the primary keys for models that we can get later with natural keys.
|
||||
self._dumpdata_assert(['fixtures.person'], '[{"fields": {"name": "Django Reinhardt"}, "model": "fixtures.person"}, {"fields": {"name": "Stephane Grappelli"}, "model": "fixtures.person"}, {"fields": {"name": "Artist formerly known as \\"Prince\\""}, "model": "fixtures.person"}]', natural_primary_keys=True)
|
||||
|
||||
# Dump the current contents of the database as a JSON fixture
|
||||
self._dumpdata_assert(['fixtures'], '[{"pk": 1, "model": "fixtures.category", "fields": {"description": "Latest news stories", "title": "News Stories"}}, {"pk": 2, "model": "fixtures.article", "fields": {"headline": "Poker on TV is great!", "pub_date": "2006-06-16T11:00:00"}}, {"pk": 3, "model": "fixtures.article", "fields": {"headline": "Copyright is fine the way it is", "pub_date": "2006-06-16T14:00:00"}}, {"pk": 4, "model": "fixtures.article", "fields": {"headline": "Django conquers world!", "pub_date": "2006-06-16T15:00:00"}}, {"pk": 5, "model": "fixtures.article", "fields": {"headline": "XML identified as leading cause of cancer", "pub_date": "2006-06-16T16:00:00"}}, {"pk": 1, "model": "fixtures.tag", "fields": {"tagged_type": ["fixtures", "article"], "name": "copyright", "tagged_id": 3}}, {"pk": 2, "model": "fixtures.tag", "fields": {"tagged_type": ["fixtures", "article"], "name": "legal", "tagged_id": 3}}, {"pk": 3, "model": "fixtures.tag", "fields": {"tagged_type": ["fixtures", "article"], "name": "django", "tagged_id": 4}}, {"pk": 4, "model": "fixtures.tag", "fields": {"tagged_type": ["fixtures", "article"], "name": "world domination", "tagged_id": 4}}, {"pk": 1, "model": "fixtures.person", "fields": {"name": "Django Reinhardt"}}, {"pk": 2, "model": "fixtures.person", "fields": {"name": "Stephane Grappelli"}}, {"pk": 3, "model": "fixtures.person", "fields": {"name": "Artist formerly known as \\"Prince\\""}}, {"pk": 1, "model": "fixtures.visa", "fields": {"person": ["Django Reinhardt"], "permissions": [["add_user", "auth", "user"], ["change_user", "auth", "user"], ["delete_user", "auth", "user"]]}}, {"pk": 2, "model": "fixtures.visa", "fields": {"person": ["Stephane Grappelli"], "permissions": [["add_user", "auth", "user"], ["delete_user", "auth", "user"]]}}, {"pk": 3, "model": "fixtures.visa", "fields": {"person": ["Artist formerly known as \\"Prince\\""], "permissions": [["change_user", "auth", "user"]]}}, {"pk": 1, "model": "fixtures.book", "fields": {"name": "Music for all ages", "authors": [["Artist formerly known as \\"Prince\\""], ["Django Reinhardt"]]}}, {"pk": 10, "model": "fixtures.book", "fields": {"name": "Achieving self-awareness of Python programs", "authors": []}}]', natural_keys=True)
|
||||
self._dumpdata_assert(['fixtures'], '[{"pk": 1, "model": "fixtures.category", "fields": {"description": "Latest news stories", "title": "News Stories"}}, {"pk": 2, "model": "fixtures.article", "fields": {"headline": "Poker on TV is great!", "pub_date": "2006-06-16T11:00:00"}}, {"pk": 3, "model": "fixtures.article", "fields": {"headline": "Copyright is fine the way it is", "pub_date": "2006-06-16T14:00:00"}}, {"pk": 4, "model": "fixtures.article", "fields": {"headline": "Django conquers world!", "pub_date": "2006-06-16T15:00:00"}}, {"pk": 5, "model": "fixtures.article", "fields": {"headline": "XML identified as leading cause of cancer", "pub_date": "2006-06-16T16:00:00"}}, {"pk": 1, "model": "fixtures.tag", "fields": {"tagged_type": ["fixtures", "article"], "name": "copyright", "tagged_id": 3}}, {"pk": 2, "model": "fixtures.tag", "fields": {"tagged_type": ["fixtures", "article"], "name": "legal", "tagged_id": 3}}, {"pk": 3, "model": "fixtures.tag", "fields": {"tagged_type": ["fixtures", "article"], "name": "django", "tagged_id": 4}}, {"pk": 4, "model": "fixtures.tag", "fields": {"tagged_type": ["fixtures", "article"], "name": "world domination", "tagged_id": 4}}, {"pk": 1, "model": "fixtures.person", "fields": {"name": "Django Reinhardt"}}, {"pk": 2, "model": "fixtures.person", "fields": {"name": "Stephane Grappelli"}}, {"pk": 3, "model": "fixtures.person", "fields": {"name": "Artist formerly known as \\"Prince\\""}}, {"pk": 1, "model": "fixtures.visa", "fields": {"person": ["Django Reinhardt"], "permissions": [["add_user", "auth", "user"], ["change_user", "auth", "user"], ["delete_user", "auth", "user"]]}}, {"pk": 2, "model": "fixtures.visa", "fields": {"person": ["Stephane Grappelli"], "permissions": [["add_user", "auth", "user"], ["delete_user", "auth", "user"]]}}, {"pk": 3, "model": "fixtures.visa", "fields": {"person": ["Artist formerly known as \\"Prince\\""], "permissions": [["change_user", "auth", "user"]]}}, {"pk": 1, "model": "fixtures.book", "fields": {"name": "Music for all ages", "authors": [["Artist formerly known as \\"Prince\\""], ["Django Reinhardt"]]}}, {"pk": 10, "model": "fixtures.book", "fields": {"name": "Achieving self-awareness of Python programs", "authors": []}}]', natural_foreign_keys=True)
|
||||
|
||||
# Dump the current contents of the database as an XML fixture
|
||||
self._dumpdata_assert(['fixtures'], """<?xml version="1.0" encoding="utf-8"?>
|
||||
<django-objects version="1.0"><object pk="1" model="fixtures.category"><field type="CharField" name="title">News Stories</field><field type="TextField" name="description">Latest news stories</field></object><object pk="2" model="fixtures.article"><field type="CharField" name="headline">Poker on TV is great!</field><field type="DateTimeField" name="pub_date">2006-06-16T11:00:00</field></object><object pk="3" model="fixtures.article"><field type="CharField" name="headline">Copyright is fine the way it is</field><field type="DateTimeField" name="pub_date">2006-06-16T14:00:00</field></object><object pk="4" model="fixtures.article"><field type="CharField" name="headline">Django conquers world!</field><field type="DateTimeField" name="pub_date">2006-06-16T15:00:00</field></object><object pk="5" model="fixtures.article"><field type="CharField" name="headline">XML identified as leading cause of cancer</field><field type="DateTimeField" name="pub_date">2006-06-16T16:00:00</field></object><object pk="1" model="fixtures.tag"><field type="CharField" name="name">copyright</field><field to="contenttypes.contenttype" name="tagged_type" rel="ManyToOneRel"><natural>fixtures</natural><natural>article</natural></field><field type="PositiveIntegerField" name="tagged_id">3</field></object><object pk="2" model="fixtures.tag"><field type="CharField" name="name">legal</field><field to="contenttypes.contenttype" name="tagged_type" rel="ManyToOneRel"><natural>fixtures</natural><natural>article</natural></field><field type="PositiveIntegerField" name="tagged_id">3</field></object><object pk="3" model="fixtures.tag"><field type="CharField" name="name">django</field><field to="contenttypes.contenttype" name="tagged_type" rel="ManyToOneRel"><natural>fixtures</natural><natural>article</natural></field><field type="PositiveIntegerField" name="tagged_id">4</field></object><object pk="4" model="fixtures.tag"><field type="CharField" name="name">world domination</field><field to="contenttypes.contenttype" name="tagged_type" rel="ManyToOneRel"><natural>fixtures</natural><natural>article</natural></field><field type="PositiveIntegerField" name="tagged_id">4</field></object><object pk="1" model="fixtures.person"><field type="CharField" name="name">Django Reinhardt</field></object><object pk="2" model="fixtures.person"><field type="CharField" name="name">Stephane Grappelli</field></object><object pk="3" model="fixtures.person"><field type="CharField" name="name">Artist formerly known as "Prince"</field></object><object pk="1" model="fixtures.visa"><field to="fixtures.person" name="person" rel="ManyToOneRel"><natural>Django Reinhardt</natural></field><field to="auth.permission" name="permissions" rel="ManyToManyRel"><object><natural>add_user</natural><natural>auth</natural><natural>user</natural></object><object><natural>change_user</natural><natural>auth</natural><natural>user</natural></object><object><natural>delete_user</natural><natural>auth</natural><natural>user</natural></object></field></object><object pk="2" model="fixtures.visa"><field to="fixtures.person" name="person" rel="ManyToOneRel"><natural>Stephane Grappelli</natural></field><field to="auth.permission" name="permissions" rel="ManyToManyRel"><object><natural>add_user</natural><natural>auth</natural><natural>user</natural></object><object><natural>delete_user</natural><natural>auth</natural><natural>user</natural></object></field></object><object pk="3" model="fixtures.visa"><field to="fixtures.person" name="person" rel="ManyToOneRel"><natural>Artist formerly known as "Prince"</natural></field><field to="auth.permission" name="permissions" rel="ManyToManyRel"><object><natural>change_user</natural><natural>auth</natural><natural>user</natural></object></field></object><object pk="1" model="fixtures.book"><field type="CharField" name="name">Music for all ages</field><field to="fixtures.person" name="authors" rel="ManyToManyRel"><object><natural>Artist formerly known as "Prince"</natural></object><object><natural>Django Reinhardt</natural></object></field></object><object pk="10" model="fixtures.book"><field type="CharField" name="name">Achieving self-awareness of Python programs</field><field to="fixtures.person" name="authors" rel="ManyToManyRel"></field></object></django-objects>""", format='xml', natural_keys=True)
|
||||
<django-objects version="1.0"><object pk="1" model="fixtures.category"><field type="CharField" name="title">News Stories</field><field type="TextField" name="description">Latest news stories</field></object><object pk="2" model="fixtures.article"><field type="CharField" name="headline">Poker on TV is great!</field><field type="DateTimeField" name="pub_date">2006-06-16T11:00:00</field></object><object pk="3" model="fixtures.article"><field type="CharField" name="headline">Copyright is fine the way it is</field><field type="DateTimeField" name="pub_date">2006-06-16T14:00:00</field></object><object pk="4" model="fixtures.article"><field type="CharField" name="headline">Django conquers world!</field><field type="DateTimeField" name="pub_date">2006-06-16T15:00:00</field></object><object pk="5" model="fixtures.article"><field type="CharField" name="headline">XML identified as leading cause of cancer</field><field type="DateTimeField" name="pub_date">2006-06-16T16:00:00</field></object><object pk="1" model="fixtures.tag"><field type="CharField" name="name">copyright</field><field to="contenttypes.contenttype" name="tagged_type" rel="ManyToOneRel"><natural>fixtures</natural><natural>article</natural></field><field type="PositiveIntegerField" name="tagged_id">3</field></object><object pk="2" model="fixtures.tag"><field type="CharField" name="name">legal</field><field to="contenttypes.contenttype" name="tagged_type" rel="ManyToOneRel"><natural>fixtures</natural><natural>article</natural></field><field type="PositiveIntegerField" name="tagged_id">3</field></object><object pk="3" model="fixtures.tag"><field type="CharField" name="name">django</field><field to="contenttypes.contenttype" name="tagged_type" rel="ManyToOneRel"><natural>fixtures</natural><natural>article</natural></field><field type="PositiveIntegerField" name="tagged_id">4</field></object><object pk="4" model="fixtures.tag"><field type="CharField" name="name">world domination</field><field to="contenttypes.contenttype" name="tagged_type" rel="ManyToOneRel"><natural>fixtures</natural><natural>article</natural></field><field type="PositiveIntegerField" name="tagged_id">4</field></object><object pk="1" model="fixtures.person"><field type="CharField" name="name">Django Reinhardt</field></object><object pk="2" model="fixtures.person"><field type="CharField" name="name">Stephane Grappelli</field></object><object pk="3" model="fixtures.person"><field type="CharField" name="name">Artist formerly known as "Prince"</field></object><object pk="1" model="fixtures.visa"><field to="fixtures.person" name="person" rel="ManyToOneRel"><natural>Django Reinhardt</natural></field><field to="auth.permission" name="permissions" rel="ManyToManyRel"><object><natural>add_user</natural><natural>auth</natural><natural>user</natural></object><object><natural>change_user</natural><natural>auth</natural><natural>user</natural></object><object><natural>delete_user</natural><natural>auth</natural><natural>user</natural></object></field></object><object pk="2" model="fixtures.visa"><field to="fixtures.person" name="person" rel="ManyToOneRel"><natural>Stephane Grappelli</natural></field><field to="auth.permission" name="permissions" rel="ManyToManyRel"><object><natural>add_user</natural><natural>auth</natural><natural>user</natural></object><object><natural>delete_user</natural><natural>auth</natural><natural>user</natural></object></field></object><object pk="3" model="fixtures.visa"><field to="fixtures.person" name="person" rel="ManyToOneRel"><natural>Artist formerly known as "Prince"</natural></field><field to="auth.permission" name="permissions" rel="ManyToManyRel"><object><natural>change_user</natural><natural>auth</natural><natural>user</natural></object></field></object><object pk="1" model="fixtures.book"><field type="CharField" name="name">Music for all ages</field><field to="fixtures.person" name="authors" rel="ManyToManyRel"><object><natural>Artist formerly known as "Prince"</natural></object><object><natural>Django Reinhardt</natural></object></field></object><object pk="10" model="fixtures.book"><field type="CharField" name="name">Achieving self-awareness of Python programs</field><field to="fixtures.person" name="authors" rel="ManyToManyRel"></field></object></django-objects>""", format='xml', natural_foreign_keys=True)
|
||||
|
||||
def test_dumpdata_with_excludes(self):
|
||||
# Load fixture1 which has a site, two articles, and a category
|
||||
|
|
@ -354,11 +359,11 @@ class FixtureLoadingTests(DumpDataAssertMixin, TestCase):
|
|||
], ordered=False)
|
||||
|
||||
# Dump the current contents of the database as a JSON fixture
|
||||
self._dumpdata_assert(['fixtures'], '[{"pk": 1, "model": "fixtures.category", "fields": {"description": "Latest news stories", "title": "News Stories"}}, {"pk": 2, "model": "fixtures.article", "fields": {"headline": "Poker has no place on ESPN", "pub_date": "2006-06-16T12:00:00"}}, {"pk": 3, "model": "fixtures.article", "fields": {"headline": "Time to reform copyright", "pub_date": "2006-06-16T13:00:00"}}, {"pk": 1, "model": "fixtures.tag", "fields": {"tagged_type": ["fixtures", "article"], "name": "copyright", "tagged_id": 3}}, {"pk": 2, "model": "fixtures.tag", "fields": {"tagged_type": ["fixtures", "article"], "name": "law", "tagged_id": 3}}, {"pk": 1, "model": "fixtures.person", "fields": {"name": "Django Reinhardt"}}, {"pk": 2, "model": "fixtures.person", "fields": {"name": "Stephane Grappelli"}}, {"pk": 3, "model": "fixtures.person", "fields": {"name": "Prince"}}, {"pk": 10, "model": "fixtures.book", "fields": {"name": "Achieving self-awareness of Python programs", "authors": []}}]', natural_keys=True)
|
||||
self._dumpdata_assert(['fixtures'], '[{"pk": 1, "model": "fixtures.category", "fields": {"description": "Latest news stories", "title": "News Stories"}}, {"pk": 2, "model": "fixtures.article", "fields": {"headline": "Poker has no place on ESPN", "pub_date": "2006-06-16T12:00:00"}}, {"pk": 3, "model": "fixtures.article", "fields": {"headline": "Time to reform copyright", "pub_date": "2006-06-16T13:00:00"}}, {"pk": 1, "model": "fixtures.tag", "fields": {"tagged_type": ["fixtures", "article"], "name": "copyright", "tagged_id": 3}}, {"pk": 2, "model": "fixtures.tag", "fields": {"tagged_type": ["fixtures", "article"], "name": "law", "tagged_id": 3}}, {"pk": 1, "model": "fixtures.person", "fields": {"name": "Django Reinhardt"}}, {"pk": 2, "model": "fixtures.person", "fields": {"name": "Stephane Grappelli"}}, {"pk": 3, "model": "fixtures.person", "fields": {"name": "Prince"}}, {"pk": 10, "model": "fixtures.book", "fields": {"name": "Achieving self-awareness of Python programs", "authors": []}}]', natural_foreign_keys=True)
|
||||
|
||||
# Dump the current contents of the database as an XML fixture
|
||||
self._dumpdata_assert(['fixtures'], """<?xml version="1.0" encoding="utf-8"?>
|
||||
<django-objects version="1.0"><object pk="1" model="fixtures.category"><field type="CharField" name="title">News Stories</field><field type="TextField" name="description">Latest news stories</field></object><object pk="2" model="fixtures.article"><field type="CharField" name="headline">Poker has no place on ESPN</field><field type="DateTimeField" name="pub_date">2006-06-16T12:00:00</field></object><object pk="3" model="fixtures.article"><field type="CharField" name="headline">Time to reform copyright</field><field type="DateTimeField" name="pub_date">2006-06-16T13:00:00</field></object><object pk="1" model="fixtures.tag"><field type="CharField" name="name">copyright</field><field to="contenttypes.contenttype" name="tagged_type" rel="ManyToOneRel"><natural>fixtures</natural><natural>article</natural></field><field type="PositiveIntegerField" name="tagged_id">3</field></object><object pk="2" model="fixtures.tag"><field type="CharField" name="name">law</field><field to="contenttypes.contenttype" name="tagged_type" rel="ManyToOneRel"><natural>fixtures</natural><natural>article</natural></field><field type="PositiveIntegerField" name="tagged_id">3</field></object><object pk="1" model="fixtures.person"><field type="CharField" name="name">Django Reinhardt</field></object><object pk="2" model="fixtures.person"><field type="CharField" name="name">Stephane Grappelli</field></object><object pk="3" model="fixtures.person"><field type="CharField" name="name">Prince</field></object><object pk="10" model="fixtures.book"><field type="CharField" name="name">Achieving self-awareness of Python programs</field><field to="fixtures.person" name="authors" rel="ManyToManyRel"></field></object></django-objects>""", format='xml', natural_keys=True)
|
||||
<django-objects version="1.0"><object pk="1" model="fixtures.category"><field type="CharField" name="title">News Stories</field><field type="TextField" name="description">Latest news stories</field></object><object pk="2" model="fixtures.article"><field type="CharField" name="headline">Poker has no place on ESPN</field><field type="DateTimeField" name="pub_date">2006-06-16T12:00:00</field></object><object pk="3" model="fixtures.article"><field type="CharField" name="headline">Time to reform copyright</field><field type="DateTimeField" name="pub_date">2006-06-16T13:00:00</field></object><object pk="1" model="fixtures.tag"><field type="CharField" name="name">copyright</field><field to="contenttypes.contenttype" name="tagged_type" rel="ManyToOneRel"><natural>fixtures</natural><natural>article</natural></field><field type="PositiveIntegerField" name="tagged_id">3</field></object><object pk="2" model="fixtures.tag"><field type="CharField" name="name">law</field><field to="contenttypes.contenttype" name="tagged_type" rel="ManyToOneRel"><natural>fixtures</natural><natural>article</natural></field><field type="PositiveIntegerField" name="tagged_id">3</field></object><object pk="1" model="fixtures.person"><field type="CharField" name="name">Django Reinhardt</field></object><object pk="2" model="fixtures.person"><field type="CharField" name="name">Stephane Grappelli</field></object><object pk="3" model="fixtures.person"><field type="CharField" name="name">Prince</field></object><object pk="10" model="fixtures.book"><field type="CharField" name="name">Achieving self-awareness of Python programs</field><field to="fixtures.person" name="authors" rel="ManyToManyRel"></field></object></django-objects>""", format='xml', natural_foreign_keys=True)
|
||||
|
||||
|
||||
class FixtureTransactionTests(DumpDataAssertMixin, TransactionTestCase):
|
||||
|
|
|
|||
|
|
@ -546,12 +546,13 @@ class NaturalKeyFixtureTests(TestCase):
|
|||
'fixtures_regress.store',
|
||||
verbosity=0,
|
||||
format='json',
|
||||
use_natural_keys=True,
|
||||
use_natural_foreign_keys=True,
|
||||
use_natural_primary_keys=True,
|
||||
stdout=stdout,
|
||||
)
|
||||
self.assertJSONEqual(
|
||||
stdout.getvalue(),
|
||||
"""[{"pk": 2, "model": "fixtures_regress.store", "fields": {"main": null, "name": "Amazon"}}, {"pk": 3, "model": "fixtures_regress.store", "fields": {"main": null, "name": "Borders"}}, {"pk": 4, "model": "fixtures_regress.person", "fields": {"name": "Neal Stephenson"}}, {"pk": 1, "model": "fixtures_regress.book", "fields": {"stores": [["Amazon"], ["Borders"]], "name": "Cryptonomicon", "author": ["Neal Stephenson"]}}]"""
|
||||
"""[{"fields": {"main": null, "name": "Amazon"}, "model": "fixtures_regress.store"}, {"fields": {"main": null, "name": "Borders"}, "model": "fixtures_regress.store"}, {"fields": {"name": "Neal Stephenson"}, "model": "fixtures_regress.person"}, {"pk": 1, "model": "fixtures_regress.book", "fields": {"stores": [["Amazon"], ["Borders"]], "name": "Cryptonomicon", "author": ["Neal Stephenson"]}}]"""
|
||||
)
|
||||
|
||||
def test_dependency_sorting(self):
|
||||
|
|
|
|||
|
|
@ -118,6 +118,7 @@ class NaturalKeyAnchor(models.Model):
|
|||
objects = NaturalKeyAnchorManager()
|
||||
|
||||
data = models.CharField(max_length=100, unique=True)
|
||||
title = models.CharField(max_length=100, null=True)
|
||||
|
||||
def natural_key(self):
|
||||
return (self.data,)
|
||||
|
|
|
|||
|
|
@ -11,6 +11,7 @@ from __future__ import unicode_literals
|
|||
import datetime
|
||||
import decimal
|
||||
from unittest import expectedFailure, skipUnless
|
||||
import warnings
|
||||
|
||||
try:
|
||||
import yaml
|
||||
|
|
@ -476,9 +477,12 @@ def naturalKeySerializerTest(format, self):
|
|||
for klass in instance_count:
|
||||
instance_count[klass] = klass.objects.count()
|
||||
|
||||
# Serialize the test database
|
||||
serialized_data = serializers.serialize(format, objects, indent=2,
|
||||
use_natural_keys=True)
|
||||
# use_natural_keys is deprecated and to be removed in Django 1.9
|
||||
with warnings.catch_warnings(record=True) as w:
|
||||
warnings.simplefilter("always")
|
||||
# Serialize the test database
|
||||
serialized_data = serializers.serialize(format, objects, indent=2,
|
||||
use_natural_keys=True)
|
||||
|
||||
for obj in serializers.deserialize(format, serialized_data):
|
||||
obj.save()
|
||||
|
|
@ -523,6 +527,35 @@ def streamTest(format, self):
|
|||
else:
|
||||
self.assertEqual(string_data, stream.content.decode('utf-8'))
|
||||
|
||||
|
||||
def naturalKeyTest(format, self):
|
||||
book1 = {'data': '978-1590597255', 'title': 'The Definitive Guide to '
|
||||
'Django: Web Development Done Right'}
|
||||
book2 = {'data':'978-1590599969', 'title': 'Practical Django Projects'}
|
||||
|
||||
# Create the books.
|
||||
adrian = NaturalKeyAnchor.objects.create(**book1)
|
||||
james = NaturalKeyAnchor.objects.create(**book2)
|
||||
|
||||
# Serialize the books.
|
||||
string_data = serializers.serialize(format, NaturalKeyAnchor.objects.all(),
|
||||
indent=2, use_natural_foreign_keys=True,
|
||||
use_natural_primary_keys=True)
|
||||
|
||||
# Delete one book (to prove that the natural key generation will only
|
||||
# restore the primary keys of books found in the database via the
|
||||
# get_natural_key manager method).
|
||||
james.delete()
|
||||
|
||||
# Deserialize and test.
|
||||
books = list(serializers.deserialize(format, string_data))
|
||||
self.assertEqual(len(books), 2)
|
||||
self.assertEqual(books[0].object.title, book1['title'])
|
||||
self.assertEqual(books[0].object.pk, adrian.pk)
|
||||
self.assertEqual(books[1].object.title, book2['title'])
|
||||
self.assertEqual(books[1].object.pk, None)
|
||||
|
||||
|
||||
for format in [
|
||||
f for f in serializers.get_serializer_formats()
|
||||
if not isinstance(serializers.get_serializer(f), serializers.BadSerializer)
|
||||
|
|
@ -530,6 +563,7 @@ for format in [
|
|||
setattr(SerializerTests, 'test_' + format + '_serializer', curry(serializerTest, format))
|
||||
setattr(SerializerTests, 'test_' + format + '_natural_key_serializer', curry(naturalKeySerializerTest, format))
|
||||
setattr(SerializerTests, 'test_' + format + '_serializer_fields', curry(fieldsTest, format))
|
||||
setattr(SerializerTests, 'test_' + format + '_serializer_natural_keys', curry(naturalKeyTest, format))
|
||||
if format != 'python':
|
||||
setattr(SerializerTests, 'test_' + format + '_serializer_stream', curry(streamTest, format))
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue