contenttypes.models.ContentTypeManager

class ContentTypeManager

ContentType also has a custom manager, ContentTypeManager, which adds the following methods:

clear_cache()

Clears an internal cache used by ContentType to keep track of models for which it has created ContentType instances. You probably won’t ever need to call this method yourself; Django will call it automatically when it’s needed.

get_for_id(id)

Lookup a ContentType by ID. Since this method uses the same shared cache as get_for_model(), it’s preferred to use this method over the usual ContentType.objects.get(pk=id)

get_for_model(model, for_concrete_model=True)

Takes either a model class or an instance of a model, and returns the ContentType instance representing that model. for_concrete_model=False allows fetching the ContentType of a proxy model.

get_for_models(*models, for_concrete_models=True)

Takes a variadic number of model classes, and returns a dictionary mapping the model classes to the ContentType instances representing them. for_concrete_models=False allows fetching the ContentType of proxy models.

get_by_natural_key(app_label, model)

Returns the ContentType instance uniquely identified by the given application label and model name. The primary purpose of this method is to allow ContentType objects to be referenced via a natural key during deserialization.

The get_for_model() method is especially useful when you know you need to work with a ContentType but don’t want to go to the trouble of obtaining the model’s metadata to perform a manual lookup:

>>> from django.contrib.auth.models import User
>>> ContentType.objects.get_for_model(User)
<ContentType: user>