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from datetime import date
from django import db
from django import forms
from django.forms.models import modelform_factory, ModelChoiceField
from django.conf import settings
from django.test import TestCase
from models import Person, Triple, FilePathModel, Article, Publication, CustomFF
class ModelMultipleChoiceFieldTests(TestCase):
def setUp(self):
self.old_debug = settings.DEBUG
settings.DEBUG = True
def tearDown(self):
settings.DEBUG = self.old_debug
def test_model_multiple_choice_number_of_queries(self):
"""
Test that ModelMultipleChoiceField does O(1) queries instead of
O(n) (#10156).
"""
for i in range(30):
Person.objects.create(name="Person %s" % i)
db.reset_queries()
f = forms.ModelMultipleChoiceField(queryset=Person.objects.all())
selected = f.clean([1, 3, 5, 7, 9])
self.assertEquals(len(db.connection.queries), 1)
class TripleForm(forms.ModelForm):
class Meta:
model = Triple
class UniqueTogetherTests(TestCase):
def test_multiple_field_unique_together(self):
"""
When the same field is involved in multiple unique_together
constraints, we need to make sure we don't remove the data for it
before doing all the validation checking (not just failing after
the first one).
"""
Triple.objects.create(left=1, middle=2, right=3)
form = TripleForm({'left': '1', 'middle': '2', 'right': '3'})
self.failIf(form.is_valid())
form = TripleForm({'left': '1', 'middle': '3', 'right': '1'})
self.failUnless(form.is_valid())
class FPForm(forms.ModelForm):
class Meta:
model = FilePathModel
class FilePathFieldTests(TestCase):
def test_file_path_field_blank(self):
"""
Regression test for #8842: FilePathField(blank=True)
"""
form = FPForm()
names = [p[1] for p in form['path'].field.choices]
names.sort()
self.assertEqual(names, ['---------', '__init__.py', 'models.py', 'tests.py'])
class ManyToManyCallableInitialTests(TestCase):
def test_callable(self):
"Regression for #10349: A callable can be provided as the initial value for an m2m field"
# Set up a callable initial value
def formfield_for_dbfield(db_field, **kwargs):
if db_field.name == 'publications':
kwargs['initial'] = lambda: Publication.objects.all().order_by('date_published')[:2]
return db_field.formfield(**kwargs)
# Set up some Publications to use as data
Publication(title="First Book", date_published=date(2007,1,1)).save()
Publication(title="Second Book", date_published=date(2008,1,1)).save()
Publication(title="Third Book", date_published=date(2009,1,1)).save()
# Create a ModelForm, instantiate it, and check that the output is as expected
ModelForm = modelform_factory(Article, formfield_callback=formfield_for_dbfield)
form = ModelForm()
self.assertEquals(form.as_ul(), u"""<li><label for="id_headline">Headline:</label> <input id="id_headline" type="text" name="headline" maxlength="100" /></li>
<li><label for="id_publications">Publications:</label> <select multiple="multiple" name="publications" id="id_publications">
<option value="1" selected="selected">First Book</option>
<option value="2" selected="selected">Second Book</option>
<option value="3">Third Book</option>
</select> Hold down "Control", or "Command" on a Mac, to select more than one.</li>""")
class CFFForm(forms.ModelForm):
class Meta:
model = CustomFF
class CustomFieldSaveTests(TestCase):
def test_save(self):
"Regression for #11149: save_form_data should be called only once"
# It's enough that the form saves without error -- the custom save routine will
# generate an AssertionError if it is called more than once during save.
form = CFFForm(data = {'f': None})
form.save()
class ModelClassTests(TestCase):
def test_no_model_class(self):
class NoModelModelForm(forms.ModelForm):
pass
self.assertRaises(ValueError, NoModelModelForm)
class ModelChoiceForm(forms.Form):
person = ModelChoiceField(Person.objects.all())
class TestTicket11183(TestCase):
def test_11183(self):
form1 = ModelChoiceForm()
field1 = form1.fields['person']
# To allow the widget to change the queryset of field1.widget.choices correctly,
# without affecting other forms, the following must hold:
self.assert_(field1 is not ModelChoiceForm.base_fields['person'])
self.assert_(field1.widget.choices.field is field1)
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