db.models.fields.related.RelatedManager.remove()

remove(*objs)

Removes the specified model objects from the related object set:

>>> b = Blog.objects.get(id=1)
>>> e = Entry.objects.get(id=234)
>>> b.entry_set.remove(e) # Disassociates Entry e from Blog b.

Similar to add(), e.save() is called in the example above to perform the update. Using remove() with a many-to-many relationship, however, will delete the relationships using QuerySet.delete() which means no model save() methods are called; listen to the m2m_changed signal if you wish to execute custom code when a relationship is deleted.

For ForeignKey objects, this method only exists if null=True. If the related field can’t be set to None (NULL), then an object can’t be removed from a relation without being added to another. In the above example, removing e from b.entry_set() is equivalent to doing e.blog = None, and because the blog ForeignKey doesn’t have null=True, this is invalid.

For ForeignKey objects, this method accepts a bulk argument to control how to perform the operation. If True (the default), QuerySet.update() is used. If bulk=False, the save() method of each individual model instance is called instead. This triggers the pre_save and post_save signals and comes at the expense of performance.