def test_invalid(self):
field = forms.JSONField()
with self.assertRaises(exceptions.ValidationError) as cm:
field.clean('{some badly formed: json}')
self.assertEqual(
cm.exception.messages[0],
"'{some badly formed: json}' value must be valid JSON.")
def test_has_changed(self):
field = forms.JSONField()
self.assertIs(field.has_changed({'a': True}, '{"a": 1}'), True)
self.assertIs(field.has_changed({
'a': 1,
'b': 2
}, '{"b": 2, "a": 1}'), False)
def test_already_converted_value(self):
field = forms.JSONField(required=False)
tests = [
'["a", "b", "c"]', '{"a": 1, "b": 2}', '1', '1.5', '"foo"',
'true', 'false', 'null',
]
for json_string in tests:
val = field.clean(json_string)
self.assertEqual(field.clean(val), val)
def test_custom_widget_kwarg(self):
"""The widget can be overridden with a kwarg."""
field = forms.JSONField(widget=widgets.Input)
self.assertIsInstance(field.widget, widgets.Input)
def test_widget(self):
"""The default widget of a JSONField is a Textarea."""
field = forms.JSONField()
self.assertIsInstance(field.widget, widgets.Textarea)
class JsonForm(Form):
name = CharField(max_length=2)
jfield = forms.JSONField()
def test_prepare_value(self):
field = forms.JSONField()
self.assertEqual(field.prepare_value({'a': 'b'}), '{"a": "b"}')
self.assertEqual(field.prepare_value(None), 'null')
self.assertEqual(field.prepare_value('foo'), '"foo"')
class JsonForm(Form):
name = CharField()
jfield = forms.JSONField(disabled=True)
def test_valid_empty(self):
field = forms.JSONField(required=False)
value = field.clean('')
self.assertIsNone(value)
def test_valid(self):
field = forms.JSONField()
value = field.clean('{"a": "b"}')
self.assertEqual(value, {'a': 'b'})
def test_form_field_deprecation_message(self):
msg = (
'django.contrib.postgres.forms.JSONField is deprecated in favor '
'of django.forms.JSONField.')
with self.assertWarnsMessage(RemovedInDjango40Warning, msg):
forms.JSONField()