48 lines
2.1 KiB
Python
48 lines
2.1 KiB
Python
class BoundRelatedObject(object):
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def __init__(self, related_object, field_mapping, original):
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self.relation = related_object
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self.field_mappings = field_mapping[related_object.name]
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def template_name(self):
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raise NotImplementedError
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def __repr__(self):
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return repr(self.__dict__)
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class RelatedObject(object):
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def __init__(self, parent_model, model, field):
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self.parent_model = parent_model
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self.model = model
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self.opts = model._meta
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self.field = field
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self.name = '%s:%s' % (self.opts.app_label, self.opts.module_name)
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self.var_name = self.opts.object_name.lower()
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def get_db_prep_lookup(self, lookup_type, value, connection, prepared=False):
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# Defer to the actual field definition for db prep
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return self.field.get_db_prep_lookup(lookup_type, value,
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connection=connection, prepared=prepared)
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def editable_fields(self):
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"Get the fields in this class that should be edited inline."
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return [f for f in self.opts.fields + self.opts.many_to_many if f.editable and f != self.field]
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def __repr__(self):
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return "<RelatedObject: %s related to %s>" % (self.name, self.field.name)
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def bind(self, field_mapping, original, bound_related_object_class=BoundRelatedObject):
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return bound_related_object_class(self, field_mapping, original)
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def get_accessor_name(self):
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# This method encapsulates the logic that decides what name to give an
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# accessor descriptor that retrieves related many-to-one or
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# many-to-many objects. It uses the lower-cased object_name + "_set",
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# but this can be overridden with the "related_name" option.
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if self.field.rel.multiple:
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# If this is a symmetrical m2m relation on self, there is no reverse accessor.
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if getattr(self.field.rel, 'symmetrical', False) and self.model == self.parent_model:
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return None
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return self.field.rel.related_name or (self.opts.object_name.lower() + '_set')
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else:
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return self.field.rel.related_name or (self.opts.object_name.lower())
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