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Added an additional attribute unknown_form_fields to FormResource

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If the attribute is set to `True`, the validation method will not
raise an `ErrorResponse` with status 400 but silently strip out
unexpected fields on the form and only return the validated data.
This commit is contained in:
Alen Mujezinovic 2012-01-17 10:58:42 +00:00
parent 5f4096ca28
commit 0a167a54fd
2 changed files with 23 additions and 2 deletions
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13
djangorestframework/resources.py
View File

@ -78,13 +78,22 @@ class FormResource(Resource):
This can be overridden by a :attr:`form` attribute on the :class:`views.View`.
"""
unknown_form_fields = False
"""
Flag to check for unknown fields when validating a form. If set to false and
we receive request data that is not expected by the form it raises an
:exc:`response.ErrorResponse` with status code 400. If set to true, only
expected fields are validated.
"""
def validate_request(self, data, files=None):
"""
Given some content as input return some cleaned, validated content.
Raises a :exc:`response.ErrorResponse` with status code 400 (Bad Request) on failure.
Validation is standard form validation, with an additional constraint that *no extra unknown fields* may be supplied.
Validation is standard form validation, with an additional constraint that *no extra unknown fields* may be supplied
if :attr:`self.unknown_form_fields` is ``True``.
On failure the :exc:`response.ErrorResponse` content is a dict which may contain :obj:`'errors'` and :obj:`'field-errors'` keys.
If the :obj:`'errors'` key exists it is a list of strings of non-field errors.
@ -132,7 +141,7 @@ class FormResource(Resource):
unknown_fields = unknown_fields - set(('csrfmiddlewaretoken', '_accept', '_method')) # TODO: Ugh.
# Check using both regular validation, and our stricter no additional fields rule
if bound_form.is_valid() and not unknown_fields:
if bound_form.is_valid() and (self.unknown_form_fields or not unknown_fields):
# Validation succeeded...
cleaned_data = bound_form.cleaned_data

12
djangorestframework/tests/validators.py
View File

@ -138,6 +138,14 @@ class TestFormValidation(TestCase):
content = {'qwerty': 'uiop', 'extra': 'extra'}
validator._validate(content, None, allowed_extra_fields=('extra',))
def validation_allows_unknown_fields_if_explicitly_allowed(self, validator):
"""If we set ``unknown_form_fields`` on the form resource, then don't
raise errors on unexpected request data"""
content = {'qwerty': 'uiop', 'extra': 'extra'}
validator.unknown_form_fields = True
self.assertDictEqual({'qwerty': u'uiop'}, validator.validate_request(content, None), "Resource didn't accept unknown fields.")
validator.unknown_form_fields = False
def validation_does_not_require_extra_fields_if_explicitly_set(self, validator):
"""If we include an allowed_extra_fields paramater on _validate, then do not fail if we do not have fields with those names."""
content = {'qwerty': 'uiop'}
@ -201,6 +209,10 @@ class TestFormValidation(TestCase):
def test_validation_allows_extra_fields_if_explicitly_set(self):
validator = self.MockFormResource(self.MockFormView())
self.validation_allows_extra_fields_if_explicitly_set(validator)
def test_validation_allows_unknown_fields_if_explicitly_allowed(self):
validator = self.MockFormResource(self.MockFormView())
self.validation_allows_unknown_fields_if_explicitly_allowed(validator)
def test_validation_does_not_require_extra_fields_if_explicitly_set(self):
validator = self.MockFormResource(self.MockFormView())