Fixed #25078 -- Added support for disabled form fields

Thanks Keryn Knight and Tim Graham for the reviews.

tests/forms_tests/tests/test_fields.py

@@ -176,6 +176,10 @@ class FieldsTests(SimpleTestCase):
         self.assertEqual(f.clean(' 1'), ' 1')
         self.assertEqual(f.clean('1 '), '1 ')
 
+    def test_charfield_disabled(self):
+        f = CharField(disabled=True)
+        self.assertWidgetRendersTo(f, '<input type="text" name="f" id="id_f" disabled />')
+
     # IntegerField ################################################################
 
     def test_integerfield_1(self):
@@ -1076,6 +1080,12 @@ class FieldsTests(SimpleTestCase):
         form = ChoiceFieldForm()
         self.assertEqual([('P', 'Paul')], list(form.fields['choicefield'].choices))
 
+    def test_choicefield_disabled(self):
+        f = ChoiceField(choices=[('J', 'John'), ('P', 'Paul')], disabled=True)
+        self.assertWidgetRendersTo(f,
+            '<select id="id_f" name="f" disabled><option value="J">John</option>'
+            '<option value="P">Paul</option></select>')
+
     # TypedChoiceField ############################################################
     # TypedChoiceField is just like ChoiceField, except that coerced types will
     # be returned:

tests/forms_tests/tests/test_forms.py

@@ -501,6 +501,37 @@ class FormsTestCase(SimpleTestCase):
 <option value="P" selected="selected">Paul McCartney</option>
 </select>""")
 
+    def test_form_with_disabled_fields(self):
+        class PersonForm(Form):
+            name = CharField()
+            birthday = DateField(disabled=True)
+
+        class PersonFormFieldInitial(Form):
+            name = CharField()
+            birthday = DateField(disabled=True, initial=datetime.date(1974, 8, 16))
+
+        # Disabled fields are generally not transmitted by user agents.
+        # The value from the form's initial data is used.
+        f1 = PersonForm({'name': 'John Doe'}, initial={'birthday': datetime.date(1974, 8, 16)})
+        f2 = PersonFormFieldInitial({'name': 'John Doe'})
+        for form in (f1, f2):
+            self.assertTrue(form.is_valid())
+            self.assertEqual(
+                form.cleaned_data,
+                {'birthday': datetime.date(1974, 8, 16), 'name': 'John Doe'}
+            )
+
+        # Values provided in the form's data are ignored.
+        data = {'name': 'John Doe', 'birthday': '1984-11-10'}
+        f1 = PersonForm(data, initial={'birthday': datetime.date(1974, 8, 16)})
+        f2 = PersonFormFieldInitial(data)
+        for form in (f1, f2):
+            self.assertTrue(form.is_valid())
+            self.assertEqual(
+                form.cleaned_data,
+                {'birthday': datetime.date(1974, 8, 16), 'name': 'John Doe'}
+            )
+
     def test_hidden_data(self):
         class SongForm(Form):
             name = CharField()