Loading docs/releases/1.8.txt +0 −22 Original line number Diff line number Diff line Loading @@ -713,28 +713,6 @@ Now, an error will be raised to prevent data loss:: ... ValueError: Cannot assign "<Author: John>": "Author" instance isn't saved in the database. Accessing foreign keys in ``ModelForm.save()`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In older versions, you could access unsaved foreign key objects in ``ModelForm.save()`` when adding new objects. For example, given ``Book`` with a ``ForeignKey`` to ``Author``:: class BookForm(forms.ModelForm): def save(self, *args, **kwargs): book = super(BookForm, self).save(*args, **kwargs) book.title = "%s by %s" % (book.title, book.author.name) return book Now if the related instance hasn't been saved (for example, when adding an author and some inlined books in the admin), accessing the foreign key ``book.author`` in the example) will raise ``RelatedObjectDoesNotExist``. This change was necessary to avoid assigning unsaved objects to relations (as described in the previous section). To adapt the example above, you could replace ``book.author.name`` with ``self.cleaned_data['author'].name``. Management commands that only accept positional arguments ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Loading docs/spelling_wordlist +0 −1 Original line number Diff line number Diff line Loading @@ -294,7 +294,6 @@ ing ini init inline inlined inlines inspectdb Instagram Loading Loading
docs/releases/1.8.txt +0 −22 Original line number Diff line number Diff line Loading @@ -713,28 +713,6 @@ Now, an error will be raised to prevent data loss:: ... ValueError: Cannot assign "<Author: John>": "Author" instance isn't saved in the database. Accessing foreign keys in ``ModelForm.save()`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In older versions, you could access unsaved foreign key objects in ``ModelForm.save()`` when adding new objects. For example, given ``Book`` with a ``ForeignKey`` to ``Author``:: class BookForm(forms.ModelForm): def save(self, *args, **kwargs): book = super(BookForm, self).save(*args, **kwargs) book.title = "%s by %s" % (book.title, book.author.name) return book Now if the related instance hasn't been saved (for example, when adding an author and some inlined books in the admin), accessing the foreign key ``book.author`` in the example) will raise ``RelatedObjectDoesNotExist``. This change was necessary to avoid assigning unsaved objects to relations (as described in the previous section). To adapt the example above, you could replace ``book.author.name`` with ``self.cleaned_data['author'].name``. Management commands that only accept positional arguments ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Loading
docs/spelling_wordlist +0 −1 Original line number Diff line number Diff line Loading @@ -294,7 +294,6 @@ ing ini init inline inlined inlines inspectdb Instagram Loading