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from __future__ import unicode_literals
from django.db import models
from django.test import TestCase
from rest_framework import generics, serializers, status
from rest_framework.test import APIRequestFactory
factory = APIRequestFactory()
# Regression for #666
class ValidationModel(models.Model):
blank_validated_field = models.CharField(max_length=255)
class ValidationModelSerializer(serializers.ModelSerializer):
class Meta:
model = ValidationModel
fields = ('blank_validated_field',)
read_only_fields = ('blank_validated_field',)
class UpdateValidationModel(generics.RetrieveUpdateDestroyAPIView):
model = ValidationModel
serializer_class = ValidationModelSerializer
class TestPreSaveValidationExclusions(TestCase):
def test_pre_save_validation_exclusions(self):
"""
Somewhat weird test case to ensure that we don't perform model
validation on read only fields.
"""
obj = ValidationModel.objects.create(blank_validated_field='')
request = factory.put('/', {}, format='json')
view = UpdateValidationModel().as_view()
response = view(request, pk=obj.pk).render()
self.assertEqual(response.status_code, status.HTTP_200_OK)
# Regression for #653
class ShouldValidateModel(models.Model):
should_validate_field = models.CharField(max_length=255)
class ShouldValidateModelSerializer(serializers.ModelSerializer):
renamed = serializers.CharField(source='should_validate_field', required=False)
def validate_renamed(self, attrs, source):
value = attrs[source]
if len(value) < 3:
raise serializers.ValidationError('Minimum 3 characters.')
return attrs
class Meta:
model = ShouldValidateModel
fields = ('renamed',)
class TestPreSaveValidationExclusionsSerializer(TestCase):
def test_renamed_fields_are_model_validated(self):
"""
Ensure fields with 'source' applied do get still get model validation.
"""
# We've set `required=False` on the serializer, but the model
# does not have `blank=True`, so this serializer should not validate.
serializer = ShouldValidateModelSerializer(data={'renamed': ''})
self.assertEqual(serializer.is_valid(), False)
self.assertIn('renamed', serializer.errors)
self.assertNotIn('should_validate_field', serializer.errors)
class TestCustomValidationMethods(TestCase):
def test_custom_validation_method_is_executed(self):
serializer = ShouldValidateModelSerializer(data={'renamed': 'fo'})
self.assertFalse(serializer.is_valid())
self.assertIn('renamed', serializer.errors)
def test_custom_validation_method_passing(self):
serializer = ShouldValidateModelSerializer(data={'renamed': 'foo'})
self.assertTrue(serializer.is_valid())
class ValidationSerializer(serializers.Serializer):
foo = serializers.CharField()
def validate_foo(self, attrs, source):
raise serializers.ValidationError("foo invalid")
def validate(self, attrs):
raise serializers.ValidationError("serializer invalid")
class TestAvoidValidation(TestCase):
"""
If serializer was initialized with invalid data (None or non dict-like), it
should avoid validation layer (validate_<field> and validate methods)
"""
def test_serializer_errors_has_only_invalid_data_error(self):
serializer = ValidationSerializer(data='invalid data')
self.assertFalse(serializer.is_valid())
self.assertDictEqual(serializer.errors,
{'non_field_errors': ['Invalid data']})
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