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Create exception subclass. Used by ModelBase below.
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Metaclass for all models.
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Provides pickling support. Normally, this just dispatches to Python's
standard handling. However, for models with deferred field loading, we
need to do things manually, as they're dynamically created classes and
only module-level classes can be pickled by the default path.
( R� t _deferredR1 RR t object_namet model_unpicklet simple_class_factoryRX R< R� R� R� R t appendt proxy_for_modelR ( R$ t datat class_idt defersR R� ( ( s7 /tmp/pip-install-XxeQeY/django/django/db/models/base.pyR' � s c C s% | s | j } n t | | j j � S( N( R1 RA t pkR� ( R$ Ro ( ( s7 /tmp/pip-install-XxeQeY/django/django/db/models/base.pyR� � s c C s t | | j j j | � S( N( R� R1 R� R� ( R$ R� ( ( s7 /tmp/pip-install-XxeQeY/django/django/db/models/base.pyt _set_pk_val� s c C sH y | j j | � d } Wn t k
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Returns the value of the field name for this instance. If the field is
a foreign key, returns the id value, instead of the object. If there's
no Field object with this name on the model, the model attribute's
value is returned directly.
Used to serialize a field's value (in the serializer, or form output,
for example). Normally, you would just access the attribute directly
and not use this method.
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Saves the current instance. Override this in a subclass if you want to
control the saving process.
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that the "save" must be an SQL insert or update (or equivalent for
non-SQL backends), respectively. Normally, they should not be set.
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Handles the parts of saving which should be done only once per save,
yet need to be done in raw saves, too. This includes some sanity
checks and signal sending.
The 'raw' argument is telling save_base not to save any parent
models and not to do any changes to the values before save. This
is used by fixture loading.
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Saves all the parents of cls using values from self.
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Does the heavy-lifting involved in saving. Updates or inserts the data
for a single table.
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This method will try to update the model. If the model was updated (in
the sense that an update query was done and a matching row was found
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Do an INSERT. If update_pk is defined then this method should return
the new pk for the model.
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Hook for doing any extra model-wide validation after clean() has been
called on every field by self.clean_fields. Any ValidationError raised
by this method will not be associated with a particular field; it will
have a special-case association with the field defined by NON_FIELD_ERRORS.
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Checks unique constraints on the model and raises ``ValidationError``
if any failed.
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Gather a list of checks to perform. Since validate_unique could be
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Needed for dynamic classes.
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Used to unpickle Model subclasses with deferred fields.
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