mirror of
https://github.com/django/django.git
synced 2025-10-31 09:41:08 +00:00
46786b4193
git-svn-id: http://code.djangoproject.com/svn/django/trunk@7971 bcc190cf-cafb-0310-a4f2-bffc1f526a37
325 lines
13 KiB
Python
325 lines
13 KiB
Python
from django.db import models
|
|
|
|
class Author(models.Model):
|
|
name = models.CharField(max_length=100)
|
|
|
|
def __unicode__(self):
|
|
return self.name
|
|
|
|
class Book(models.Model):
|
|
author = models.ForeignKey(Author)
|
|
title = models.CharField(max_length=100)
|
|
|
|
def __unicode__(self):
|
|
return self.title
|
|
|
|
class AuthorMeeting(models.Model):
|
|
name = models.CharField(max_length=100)
|
|
authors = models.ManyToManyField(Author)
|
|
created = models.DateField(editable=False)
|
|
|
|
def __unicode__(self):
|
|
return self.name
|
|
|
|
|
|
__test__ = {'API_TESTS': """
|
|
|
|
>>> from datetime import date
|
|
|
|
>>> from django.forms.models import modelformset_factory
|
|
|
|
>>> qs = Author.objects.all()
|
|
>>> AuthorFormSet = modelformset_factory(Author, extra=3)
|
|
|
|
>>> formset = AuthorFormSet(queryset=qs)
|
|
>>> for form in formset.forms:
|
|
... print form.as_p()
|
|
<p><label for="id_form-0-name">Name:</label> <input id="id_form-0-name" type="text" name="form-0-name" maxlength="100" /><input type="hidden" name="form-0-id" id="id_form-0-id" /></p>
|
|
<p><label for="id_form-1-name">Name:</label> <input id="id_form-1-name" type="text" name="form-1-name" maxlength="100" /><input type="hidden" name="form-1-id" id="id_form-1-id" /></p>
|
|
<p><label for="id_form-2-name">Name:</label> <input id="id_form-2-name" type="text" name="form-2-name" maxlength="100" /><input type="hidden" name="form-2-id" id="id_form-2-id" /></p>
|
|
|
|
>>> data = {
|
|
... 'form-TOTAL_FORMS': '3', # the number of forms rendered
|
|
... 'form-INITIAL_FORMS': '0', # the number of forms with initial data
|
|
... 'form-MAX_FORMS': '0', # the max number of forms
|
|
... 'form-0-name': 'Charles Baudelaire',
|
|
... 'form-1-name': 'Arthur Rimbaud',
|
|
... 'form-2-name': '',
|
|
... }
|
|
|
|
>>> formset = AuthorFormSet(data=data, queryset=qs)
|
|
>>> formset.is_valid()
|
|
True
|
|
|
|
>>> formset.save()
|
|
[<Author: Charles Baudelaire>, <Author: Arthur Rimbaud>]
|
|
|
|
>>> for author in Author.objects.order_by('name'):
|
|
... print author.name
|
|
Arthur Rimbaud
|
|
Charles Baudelaire
|
|
|
|
|
|
Gah! We forgot Paul Verlaine. Let's create a formset to edit the existing
|
|
authors with an extra form to add him. We *could* pass in a queryset to
|
|
restrict the Author objects we edit, but in this case we'll use it to display
|
|
them in alphabetical order by name.
|
|
|
|
>>> qs = Author.objects.order_by('name')
|
|
>>> AuthorFormSet = modelformset_factory(Author, extra=1, can_delete=False)
|
|
|
|
>>> formset = AuthorFormSet(queryset=qs)
|
|
>>> for form in formset.forms:
|
|
... print form.as_p()
|
|
<p><label for="id_form-0-name">Name:</label> <input id="id_form-0-name" type="text" name="form-0-name" value="Arthur Rimbaud" maxlength="100" /><input type="hidden" name="form-0-id" value="2" id="id_form-0-id" /></p>
|
|
<p><label for="id_form-1-name">Name:</label> <input id="id_form-1-name" type="text" name="form-1-name" value="Charles Baudelaire" maxlength="100" /><input type="hidden" name="form-1-id" value="1" id="id_form-1-id" /></p>
|
|
<p><label for="id_form-2-name">Name:</label> <input id="id_form-2-name" type="text" name="form-2-name" maxlength="100" /><input type="hidden" name="form-2-id" id="id_form-2-id" /></p>
|
|
|
|
|
|
>>> data = {
|
|
... 'form-TOTAL_FORMS': '3', # the number of forms rendered
|
|
... 'form-INITIAL_FORMS': '2', # the number of forms with initial data
|
|
... 'form-MAX_FORMS': '0', # the max number of forms
|
|
... 'form-0-id': '2',
|
|
... 'form-0-name': 'Arthur Rimbaud',
|
|
... 'form-1-id': '1',
|
|
... 'form-1-name': 'Charles Baudelaire',
|
|
... 'form-2-name': 'Paul Verlaine',
|
|
... }
|
|
|
|
>>> formset = AuthorFormSet(data=data, queryset=qs)
|
|
>>> formset.is_valid()
|
|
True
|
|
|
|
# Only changed or new objects are returned from formset.save()
|
|
>>> formset.save()
|
|
[<Author: Paul Verlaine>]
|
|
|
|
>>> for author in Author.objects.order_by('name'):
|
|
... print author.name
|
|
Arthur Rimbaud
|
|
Charles Baudelaire
|
|
Paul Verlaine
|
|
|
|
|
|
This probably shouldn't happen, but it will. If an add form was marked for
|
|
deltetion, make sure we don't save that form.
|
|
|
|
>>> qs = Author.objects.order_by('name')
|
|
>>> AuthorFormSet = modelformset_factory(Author, extra=1, can_delete=True)
|
|
|
|
>>> formset = AuthorFormSet(queryset=qs)
|
|
>>> for form in formset.forms:
|
|
... print form.as_p()
|
|
<p><label for="id_form-0-name">Name:</label> <input id="id_form-0-name" type="text" name="form-0-name" value="Arthur Rimbaud" maxlength="100" /></p>
|
|
<p><label for="id_form-0-DELETE">Delete:</label> <input type="checkbox" name="form-0-DELETE" id="id_form-0-DELETE" /><input type="hidden" name="form-0-id" value="2" id="id_form-0-id" /></p>
|
|
<p><label for="id_form-1-name">Name:</label> <input id="id_form-1-name" type="text" name="form-1-name" value="Charles Baudelaire" maxlength="100" /></p>
|
|
<p><label for="id_form-1-DELETE">Delete:</label> <input type="checkbox" name="form-1-DELETE" id="id_form-1-DELETE" /><input type="hidden" name="form-1-id" value="1" id="id_form-1-id" /></p>
|
|
<p><label for="id_form-2-name">Name:</label> <input id="id_form-2-name" type="text" name="form-2-name" value="Paul Verlaine" maxlength="100" /></p>
|
|
<p><label for="id_form-2-DELETE">Delete:</label> <input type="checkbox" name="form-2-DELETE" id="id_form-2-DELETE" /><input type="hidden" name="form-2-id" value="3" id="id_form-2-id" /></p>
|
|
<p><label for="id_form-3-name">Name:</label> <input id="id_form-3-name" type="text" name="form-3-name" maxlength="100" /></p>
|
|
<p><label for="id_form-3-DELETE">Delete:</label> <input type="checkbox" name="form-3-DELETE" id="id_form-3-DELETE" /><input type="hidden" name="form-3-id" id="id_form-3-id" /></p>
|
|
|
|
>>> data = {
|
|
... 'form-TOTAL_FORMS': '4', # the number of forms rendered
|
|
... 'form-INITIAL_FORMS': '3', # the number of forms with initial data
|
|
... 'form-MAX_FORMS': '0', # the max number of forms
|
|
... 'form-0-id': '2',
|
|
... 'form-0-name': 'Arthur Rimbaud',
|
|
... 'form-1-id': '1',
|
|
... 'form-1-name': 'Charles Baudelaire',
|
|
... 'form-2-id': '3',
|
|
... 'form-2-name': 'Paul Verlaine',
|
|
... 'form-3-name': 'Walt Whitman',
|
|
... 'form-3-DELETE': 'on',
|
|
... }
|
|
|
|
>>> formset = AuthorFormSet(data=data, queryset=qs)
|
|
>>> formset.is_valid()
|
|
True
|
|
|
|
# No objects were changed or saved so nothing will come back.
|
|
>>> formset.save()
|
|
[]
|
|
|
|
>>> for author in Author.objects.order_by('name'):
|
|
... print author.name
|
|
Arthur Rimbaud
|
|
Charles Baudelaire
|
|
Paul Verlaine
|
|
|
|
Let's edit a record to ensure save only returns that one record.
|
|
|
|
>>> data = {
|
|
... 'form-TOTAL_FORMS': '4', # the number of forms rendered
|
|
... 'form-INITIAL_FORMS': '3', # the number of forms with initial data
|
|
... 'form-MAX_FORMS': '0', # the max number of forms
|
|
... 'form-0-id': '2',
|
|
... 'form-0-name': 'Walt Whitman',
|
|
... 'form-1-id': '1',
|
|
... 'form-1-name': 'Charles Baudelaire',
|
|
... 'form-2-id': '3',
|
|
... 'form-2-name': 'Paul Verlaine',
|
|
... 'form-3-name': '',
|
|
... 'form-3-DELETE': '',
|
|
... }
|
|
|
|
>>> formset = AuthorFormSet(data=data, queryset=qs)
|
|
>>> formset.is_valid()
|
|
True
|
|
|
|
# One record has changed.
|
|
>>> formset.save()
|
|
[<Author: Walt Whitman>]
|
|
|
|
Test the behavior of commit=False and save_m2m
|
|
|
|
>>> meeting = AuthorMeeting.objects.create(created=date.today())
|
|
>>> meeting.authors = Author.objects.all()
|
|
|
|
# create an Author instance to add to the meeting.
|
|
>>> new_author = Author.objects.create(name=u'John Steinbeck')
|
|
|
|
>>> AuthorMeetingFormSet = modelformset_factory(AuthorMeeting, extra=1, can_delete=True)
|
|
>>> data = {
|
|
... 'form-TOTAL_FORMS': '2', # the number of forms rendered
|
|
... 'form-INITIAL_FORMS': '1', # the number of forms with initial data
|
|
... 'form-MAX_FORMS': '0', # the max number of forms
|
|
... 'form-0-id': '1',
|
|
... 'form-0-name': '2nd Tuesday of the Week Meeting',
|
|
... 'form-0-authors': [2, 1, 3, 4],
|
|
... 'form-1-name': '',
|
|
... 'form-1-authors': '',
|
|
... 'form-1-DELETE': '',
|
|
... }
|
|
>>> formset = AuthorMeetingFormSet(data=data, queryset=AuthorMeeting.objects.all())
|
|
>>> formset.is_valid()
|
|
True
|
|
>>> instances = formset.save(commit=False)
|
|
>>> for instance in instances:
|
|
... instance.created = date.today()
|
|
... instance.save()
|
|
>>> formset.save_m2m()
|
|
>>> instances[0].authors.all()
|
|
[<Author: Charles Baudelaire>, <Author: Walt Whitman>, <Author: Paul Verlaine>, <Author: John Steinbeck>]
|
|
|
|
# delete the author we created to allow later tests to continue working.
|
|
>>> new_author.delete()
|
|
|
|
Test the behavior of max_num with model formsets. It should properly limit
|
|
the queryset to reduce the amount of objects being pulled in when not being
|
|
used.
|
|
|
|
>>> qs = Author.objects.order_by('name')
|
|
|
|
>>> AuthorFormSet = modelformset_factory(Author, max_num=2)
|
|
>>> formset = AuthorFormSet(queryset=qs)
|
|
>>> formset.initial
|
|
[{'id': 1, 'name': u'Charles Baudelaire'}, {'id': 3, 'name': u'Paul Verlaine'}]
|
|
|
|
>>> AuthorFormSet = modelformset_factory(Author, max_num=3)
|
|
>>> formset = AuthorFormSet(queryset=qs)
|
|
>>> formset.initial
|
|
[{'id': 1, 'name': u'Charles Baudelaire'}, {'id': 3, 'name': u'Paul Verlaine'}, {'id': 2, 'name': u'Walt Whitman'}]
|
|
|
|
# Inline Formsets ############################################################
|
|
|
|
We can also create a formset that is tied to a parent model. This is how the
|
|
admin system's edit inline functionality works.
|
|
|
|
>>> from django.forms.models import inlineformset_factory
|
|
|
|
>>> AuthorBooksFormSet = inlineformset_factory(Author, Book, can_delete=False, extra=3)
|
|
>>> author = Author.objects.get(name='Charles Baudelaire')
|
|
|
|
>>> formset = AuthorBooksFormSet(instance=author)
|
|
>>> for form in formset.forms:
|
|
... print form.as_p()
|
|
<p><label for="id_book_set-0-title">Title:</label> <input id="id_book_set-0-title" type="text" name="book_set-0-title" maxlength="100" /><input type="hidden" name="book_set-0-id" id="id_book_set-0-id" /></p>
|
|
<p><label for="id_book_set-1-title">Title:</label> <input id="id_book_set-1-title" type="text" name="book_set-1-title" maxlength="100" /><input type="hidden" name="book_set-1-id" id="id_book_set-1-id" /></p>
|
|
<p><label for="id_book_set-2-title">Title:</label> <input id="id_book_set-2-title" type="text" name="book_set-2-title" maxlength="100" /><input type="hidden" name="book_set-2-id" id="id_book_set-2-id" /></p>
|
|
|
|
>>> data = {
|
|
... 'book_set-TOTAL_FORMS': '3', # the number of forms rendered
|
|
... 'book_set-INITIAL_FORMS': '0', # the number of forms with initial data
|
|
... 'book_set-MAX_FORMS': '0', # the max number of forms
|
|
... 'book_set-0-title': 'Les Fleurs du Mal',
|
|
... 'book_set-1-title': '',
|
|
... 'book_set-2-title': '',
|
|
... }
|
|
|
|
>>> formset = AuthorBooksFormSet(data, instance=author)
|
|
>>> formset.is_valid()
|
|
True
|
|
|
|
>>> formset.save()
|
|
[<Book: Les Fleurs du Mal>]
|
|
|
|
>>> for book in author.book_set.all():
|
|
... print book.title
|
|
Les Fleurs du Mal
|
|
|
|
|
|
Now that we've added a book to Charles Baudelaire, let's try adding another
|
|
one. This time though, an edit form will be available for every existing
|
|
book.
|
|
|
|
>>> AuthorBooksFormSet = inlineformset_factory(Author, Book, can_delete=False, extra=2)
|
|
>>> author = Author.objects.get(name='Charles Baudelaire')
|
|
|
|
>>> formset = AuthorBooksFormSet(instance=author)
|
|
>>> for form in formset.forms:
|
|
... print form.as_p()
|
|
<p><label for="id_book_set-0-title">Title:</label> <input id="id_book_set-0-title" type="text" name="book_set-0-title" value="Les Fleurs du Mal" maxlength="100" /><input type="hidden" name="book_set-0-id" value="1" id="id_book_set-0-id" /></p>
|
|
<p><label for="id_book_set-1-title">Title:</label> <input id="id_book_set-1-title" type="text" name="book_set-1-title" maxlength="100" /><input type="hidden" name="book_set-1-id" id="id_book_set-1-id" /></p>
|
|
<p><label for="id_book_set-2-title">Title:</label> <input id="id_book_set-2-title" type="text" name="book_set-2-title" maxlength="100" /><input type="hidden" name="book_set-2-id" id="id_book_set-2-id" /></p>
|
|
|
|
>>> data = {
|
|
... 'book_set-TOTAL_FORMS': '3', # the number of forms rendered
|
|
... 'book_set-INITIAL_FORMS': '1', # the number of forms with initial data
|
|
... 'book_set-MAX_FORMS': '0', # the max number of forms
|
|
... 'book_set-0-id': '1',
|
|
... 'book_set-0-title': 'Les Fleurs du Mal',
|
|
... 'book_set-1-title': 'Le Spleen de Paris',
|
|
... 'book_set-2-title': '',
|
|
... }
|
|
|
|
>>> formset = AuthorBooksFormSet(data, instance=author)
|
|
>>> formset.is_valid()
|
|
True
|
|
|
|
>>> formset.save()
|
|
[<Book: Le Spleen de Paris>]
|
|
|
|
As you can see, 'Le Spleen de Paris' is now a book belonging to Charles Baudelaire.
|
|
|
|
>>> for book in author.book_set.order_by('title'):
|
|
... print book.title
|
|
Le Spleen de Paris
|
|
Les Fleurs du Mal
|
|
|
|
The save_as_new parameter lets you re-associate the data to a new instance.
|
|
This is used in the admin for save_as functionality.
|
|
|
|
>>> data = {
|
|
... 'book_set-TOTAL_FORMS': '3', # the number of forms rendered
|
|
... 'book_set-INITIAL_FORMS': '2', # the number of forms with initial data
|
|
... 'book_set-MAX_FORMS': '0', # the max number of forms
|
|
... 'book_set-0-id': '1',
|
|
... 'book_set-0-title': 'Les Fleurs du Mal',
|
|
... 'book_set-1-id': '2',
|
|
... 'book_set-1-title': 'Le Spleen de Paris',
|
|
... 'book_set-2-title': '',
|
|
... }
|
|
|
|
>>> formset = AuthorBooksFormSet(data, instance=Author(), save_as_new=True)
|
|
>>> formset.is_valid()
|
|
True
|
|
|
|
>>> new_author = Author.objects.create(name='Charles Baudelaire')
|
|
>>> formset.instance = new_author
|
|
>>> [book for book in formset.save() if book.author.pk == new_author.pk]
|
|
[<Book: Les Fleurs du Mal>, <Book: Le Spleen de Paris>]
|
|
|
|
"""}
|