Django datetimefield not validating
Thus, you should always return a nice, human-readable representation of the model from the The logic here is that if you change the URL structure of your objects, even for something simple such as correcting a spelling error, you don’t want to have to track down every place that the URL might be created. Both of these methods will perform their queries using the default manager for the model.
If you need to emulate filtering used by a custom manager, or want to perform one-off custom filtering, both methods also accept optional keyword arguments, which should be in the format described in .
If you assign auto-primary-key values manually, make sure not to use an already-existing primary-key value! Explicitly specifying auto-primary-key values is mostly useful for bulk-saving objects, when you’re confident you won’t have primary-key collision.
As far as I know, Django doesn't make it easy to globally enforce these types of criteria.Note that in the case of identical date values, these methods will use the primary key as a tie-breaker.This guarantees that no records are skipped or duplicated.Note that when deferred fields are accessed, the loading of the deferred field’s value happens through this method.
Thus it is possible to customize the way deferred loading happens.If you generate a pickle using Django version N, there is no guarantee that pickle will be readable with Django version N 1.