1 1
# -*- coding: utf-8 -*-
2 -
from django.forms import Form, CharField, IntegerField, ValidationError, DateField
2 +
from django.forms import Form, CharField, IntegerField, ValidationError, DateField, formsets
3 3
from django.forms.formsets import formset_factory, BaseFormSet
4 4
from django.test import TestCase
5 5
@@ -47,7 +47,7 @@ def test_basic_formset(self):
47 47
# for adding data. By default, it displays 1 blank form. It can display more,
48 48
# but we'll look at how to do so later.
49 49
formset = ChoiceFormSet(auto_id=False, prefix='choices')
50 -
self.assertHTMLEqual(str(formset), """<input type="hidden" name="choices-TOTAL_FORMS" value="1" /><input type="hidden" name="choices-INITIAL_FORMS" value="0" /><input type="hidden" name="choices-MAX_NUM_FORMS" />
50 +
self.assertHTMLEqual(str(formset), """<input type="hidden" name="choices-TOTAL_FORMS" value="1" /><input type="hidden" name="choices-INITIAL_FORMS" value="0" /><input type="hidden" name="choices-MAX_NUM_FORMS" value="1000" />
51 51
<tr><th>Choice:</th><td><input type="text" name="choices-0-choice" /></td></tr>
52 52
<tr><th>Votes:</th><td><input type="text" name="choices-0-votes" /></td></tr>""")
53 53
@@ -650,8 +650,8 @@ def test_limiting_max_forms(self):
650 650
# Limiting the maximum number of forms ########################################
651 651
# Base case for max_num.
652 652 653 -
# When not passed, max_num will take its default value of None, i.e. unlimited
654 -
# number of forms, only controlled by the value of the extra parameter.
653 +
# When not passed, max_num will take a high default value, leaving the
654 +
# number of forms only controlled by the value of the extra parameter.
655 655 656 656
LimitedFavoriteDrinkFormSet = formset_factory(FavoriteDrinkForm, extra=3)
657 657
formset = LimitedFavoriteDrinkFormSet()
@@ -698,8 +698,8 @@ def test_limiting_max_forms(self):
698 698
def test_max_num_with_initial_data(self):
699 699
# max_num with initial data
700 700 701 -
# When not passed, max_num will take its default value of None, i.e. unlimited
702 -
# number of forms, only controlled by the values of the initial and extra
701 +
# When not passed, max_num will take a high default value, leaving the
702 +
# number of forms only controlled by the value of the initial and extra
703 703
# parameters.
704 704 705 705
initial = [
@@ -844,6 +844,64 @@ def test_formset_nonzero(self):
844 844
self.assertEqual(len(formset.forms), 0)
845 845
self.assertTrue(formset)
846 846 847 +
def test_hard_limit_on_instantiated_forms(self):
848 +
"""A formset has a hard limit on the number of forms instantiated."""
849 +
# reduce the default limit of 1000 temporarily for testing
850 +
_old_DEFAULT_MAX_NUM = formsets.DEFAULT_MAX_NUM
851 +
try:
852 +
formsets.DEFAULT_MAX_NUM = 3
853 +
ChoiceFormSet = formset_factory(Choice)
854 +
# someone fiddles with the mgmt form data...
855 +
formset = ChoiceFormSet(
856 +
{
857 +
'choices-TOTAL_FORMS': '4',
858 +
'choices-INITIAL_FORMS': '0',
859 +
'choices-MAX_NUM_FORMS': '4',
860 +
'choices-0-choice': 'Zero',
861 +
'choices-0-votes': '0',
862 +
'choices-1-choice': 'One',
863 +
'choices-1-votes': '1',
864 +
'choices-2-choice': 'Two',
865 +
'choices-2-votes': '2',
866 +
'choices-3-choice': 'Three',
867 +
'choices-3-votes': '3',
868 +
},
869 +
prefix='choices',
870 +
)
871 +
# But we still only instantiate 3 forms
872 +
self.assertEqual(len(formset.forms), 3)
873 +
finally:
874 +
formsets.DEFAULT_MAX_NUM = _old_DEFAULT_MAX_NUM
875 + 876 +
def test_increase_hard_limit(self):
877 +
"""Can increase the built-in forms limit via a higher max_num."""
878 +
# reduce the default limit of 1000 temporarily for testing
879 +
_old_DEFAULT_MAX_NUM = formsets.DEFAULT_MAX_NUM
880 +
try:
881 +
formsets.DEFAULT_MAX_NUM = 3
882 +
# for this form, we want a limit of 4
883 +
ChoiceFormSet = formset_factory(Choice, max_num=4)
884 +
formset = ChoiceFormSet(
885 +
{
886 +
'choices-TOTAL_FORMS': '4',
887 +
'choices-INITIAL_FORMS': '0',
888 +
'choices-MAX_NUM_FORMS': '4',
889 +
'choices-0-choice': 'Zero',
890 +
'choices-0-votes': '0',
891 +
'choices-1-choice': 'One',
892 +
'choices-1-votes': '1',
893 +
'choices-2-choice': 'Two',
894 +
'choices-2-votes': '2',
895 +
'choices-3-choice': 'Three',
896 +
'choices-3-votes': '3',
897 +
},
898 +
prefix='choices',
899 +
)
900 +
# This time four forms are instantiated
901 +
self.assertEqual(len(formset.forms), 4)
902 +
finally:
903 +
formsets.DEFAULT_MAX_NUM = _old_DEFAULT_MAX_NUM
904 + 847 905 848 906
data = {
849 907
'choices-TOTAL_FORMS': '1', # the number of forms rendered
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