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Moved an inner function in db.migrations.state to avoid redefinition.

This commit is contained in:
Simon Charette 2015-10-19 18:40:25 -04:00
parent 63f0e2df2a
commit 2ee67f0373
1 changed files with 24 additions and 20 deletions
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44
django/db/migrations/state.py
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@ -29,9 +29,30 @@ def _get_app_label_and_model_name(model, app_label=''):
return model._meta.app_label, model._meta.model_name return model._meta.app_label, model._meta.model_name
def _get_related_models(m):
"""
Return all models that have a direct relationship to the given model.
"""
related_models = [
subclass for subclass in m.__subclasses__()
if issubclass(subclass, models.Model)
]
related_fields_models = set()
for f in m._meta.get_fields(include_parents=True, include_hidden=True):
if f.is_relation and f.related_model is not None and not isinstance(f.related_model, six.string_types):
related_fields_models.add(f.model)
related_models.append(f.related_model)
# Reverse accessors of foreign keys to proxy models are attached to their
# concrete proxied model.
opts = m._meta
if opts.proxy and m in related_fields_models:
related_models.append(opts.concrete_model)
return related_models
def get_related_models_recursive(model): def get_related_models_recursive(model):
""" """
Returns all models that have a direct or indirect relationship Return all models that have a direct or indirect relationship
to the given model. to the given model.
Relationships are either defined by explicit relational fields, like Relationships are either defined by explicit relational fields, like
@ -40,31 +61,14 @@ def get_related_models_recursive(model):
however, that a model inheriting from a concrete model is also related to however, that a model inheriting from a concrete model is also related to
its superclass through the implicit *_ptr OneToOneField on the subclass. its superclass through the implicit *_ptr OneToOneField on the subclass.
""" """
def _related_models(m):
related_models = [
subclass for subclass in m.__subclasses__()
if issubclass(subclass, models.Model)
]
related_fields_models = set()
for f in m._meta.get_fields(include_parents=True, include_hidden=True):
if f.is_relation and f.related_model is not None and not isinstance(f.related_model, six.string_types):
related_fields_models.add(f.model)
related_models.append(f.related_model)
# Reverse accessors of foreign keys to proxy models
# are attached to their concrete proxied model.
opts = m._meta
if opts.proxy and m in related_fields_models:
related_models.append(opts.concrete_model)
return related_models
seen = set() seen = set()
queue = _related_models(model) queue = _get_related_models(model)
for rel_mod in queue: for rel_mod in queue:
rel_app_label, rel_model_name = rel_mod._meta.app_label, rel_mod._meta.model_name rel_app_label, rel_model_name = rel_mod._meta.app_label, rel_mod._meta.model_name
if (rel_app_label, rel_model_name) in seen: if (rel_app_label, rel_model_name) in seen:
continue continue
seen.add((rel_app_label, rel_model_name)) seen.add((rel_app_label, rel_model_name))
queue.extend(_related_models(rel_mod)) queue.extend(_get_related_models(rel_mod))
return seen - {(model._meta.app_label, model._meta.model_name)} return seen - {(model._meta.app_label, model._meta.model_name)}