from __future__ import unicode_literals import django import pytest from django.db import models from django.shortcuts import get_object_or_404 from django.test import TestCase from django.utils import six from rest_framework import generics, renderers, serializers, status from rest_framework.response import Response from rest_framework.test import APIRequestFactory from tests.models import ( BasicModel, ForeignKeySource, ForeignKeyTarget, RESTFrameworkModel ) factory = APIRequestFactory() # Models class SlugBasedModel(RESTFrameworkModel): text = models.CharField(max_length=100) slug = models.SlugField(max_length=32) # Model for regression test for #285 class Comment(RESTFrameworkModel): email = models.EmailField() content = models.CharField(max_length=200) created = models.DateTimeField(auto_now_add=True) # Serializers class BasicSerializer(serializers.ModelSerializer): class Meta: model = BasicModel class ForeignKeySerializer(serializers.ModelSerializer): class Meta: model = ForeignKeySource class SlugSerializer(serializers.ModelSerializer): slug = serializers.ReadOnlyField() class Meta: model = SlugBasedModel fields = ('text', 'slug') # Views class RootView(generics.ListCreateAPIView): queryset = BasicModel.objects.all() serializer_class = BasicSerializer class InstanceView(generics.RetrieveUpdateDestroyAPIView): queryset = BasicModel.objects.exclude(text='filtered out') serializer_class = BasicSerializer class FKInstanceView(generics.RetrieveUpdateDestroyAPIView): queryset = ForeignKeySource.objects.all() serializer_class = ForeignKeySerializer class SlugBasedInstanceView(InstanceView): """ A model with a slug-field. """ queryset = SlugBasedModel.objects.all() serializer_class = SlugSerializer lookup_field = 'slug' # Tests class TestRootView(TestCase): def setUp(self): """ Create 3 BasicModel instances. """ items = ['foo', 'bar', 'baz'] for item in items: BasicModel(text=item).save() self.objects = BasicModel.objects self.data = [ {'id': obj.id, 'text': obj.text} for obj in self.objects.all() ] self.view = RootView.as_view() def test_get_root_view(self): """ GET requests to ListCreateAPIView should return list of objects. """ request = factory.get('/') with self.assertNumQueries(1): response = self.view(request).render() self.assertEqual(response.status_code, status.HTTP_200_OK) self.assertEqual(response.data, self.data) def test_post_root_view(self): """ POST requests to ListCreateAPIView should create a new object. """ data = {'text': 'foobar'} request = factory.post('/', data, format='json') with self.assertNumQueries(1): response = self.view(request).render() self.assertEqual(response.status_code, status.HTTP_201_CREATED) self.assertEqual(response.data, {'id': 4, 'text': 'foobar'}) created = self.objects.get(id=4) self.assertEqual(created.text, 'foobar') def test_put_root_view(self): """ PUT requests to ListCreateAPIView should not be allowed """ data = {'text': 'foobar'} request = factory.put('/', data, format='json') with self.assertNumQueries(0): response = self.view(request).render() self.assertEqual(response.status_code, status.HTTP_405_METHOD_NOT_ALLOWED) self.assertEqual(response.data, {"detail": 'Method "PUT" not allowed.'}) def test_delete_root_view(self): """ DELETE requests to ListCreateAPIView should not be allowed """ request = factory.delete('/') with self.assertNumQueries(0): response = self.view(request).render() self.assertEqual(response.status_code, status.HTTP_405_METHOD_NOT_ALLOWED) self.assertEqual(response.data, {"detail": 'Method "DELETE" not allowed.'}) def test_post_cannot_set_id(self): """ POST requests to create a new object should not be able to set the id. """ data = {'id': 999, 'text': 'foobar'} request = factory.post('/', data, format='json') with self.assertNumQueries(1): response = self.view(request).render() self.assertEqual(response.status_code, status.HTTP_201_CREATED) self.assertEqual(response.data, {'id': 4, 'text': 'foobar'}) created = self.objects.get(id=4) self.assertEqual(created.text, 'foobar') def test_post_error_root_view(self): """ POST requests to ListCreateAPIView in HTML should include a form error. """ data = {'text': 'foobar' * 100} request = factory.post('/', data, HTTP_ACCEPT='text/html') response = self.view(request).render() expected_error = 'Ensure this field has no more than 100 characters.' self.assertIn(expected_error, response.rendered_content.decode('utf-8')) EXPECTED_QUERIES_FOR_PUT = 3 if django.VERSION < (1, 6) else 2 class TestInstanceView(TestCase): def setUp(self): """ Create 3 BasicModel instances. """ items = ['foo', 'bar', 'baz', 'filtered out'] for item in items: BasicModel(text=item).save() self.objects = BasicModel.objects.exclude(text='filtered out') self.data = [ {'id': obj.id, 'text': obj.text} for obj in self.objects.all() ] self.view = InstanceView.as_view() self.slug_based_view = SlugBasedInstanceView.as_view() def test_get_instance_view(self): """ GET requests to RetrieveUpdateDestroyAPIView should return a single object. """ request = factory.get('/1') with self.assertNumQueries(1): response = self.view(request, pk=1).render() self.assertEqual(response.status_code, status.HTTP_200_OK) self.assertEqual(response.data, self.data[0]) def test_post_instance_view(self): """ POST requests to RetrieveUpdateDestroyAPIView should not be allowed """ data = {'text': 'foobar'} request = factory.post('/', data, format='json') with self.assertNumQueries(0): response = self.view(request).render() self.assertEqual(response.status_code, status.HTTP_405_METHOD_NOT_ALLOWED) self.assertEqual(response.data, {"detail": 'Method "POST" not allowed.'}) def test_put_instance_view(self): """ PUT requests to RetrieveUpdateDestroyAPIView should update an object. """ data = {'text': 'foobar'} request = factory.put('/1', data, format='json') with self.assertNumQueries(EXPECTED_QUERIES_FOR_PUT): response = self.view(request, pk='1').render() self.assertEqual(response.status_code, status.HTTP_200_OK) self.assertEqual(dict(response.data), {'id': 1, 'text': 'foobar'}) updated = self.objects.get(id=1) self.assertEqual(updated.text, 'foobar') def test_patch_instance_view(self): """ PATCH requests to RetrieveUpdateDestroyAPIView should update an object. """ data = {'text': 'foobar'} request = factory.patch('/1', data, format='json') with self.assertNumQueries(EXPECTED_QUERIES_FOR_PUT): response = self.view(request, pk=1).render() self.assertEqual(response.status_code, status.HTTP_200_OK) self.assertEqual(response.data, {'id': 1, 'text': 'foobar'}) updated = self.objects.get(id=1) self.assertEqual(updated.text, 'foobar') def test_delete_instance_view(self): """ DELETE requests to RetrieveUpdateDestroyAPIView should delete an object. """ request = factory.delete('/1') with self.assertNumQueries(2): response = self.view(request, pk=1).render() self.assertEqual(response.status_code, status.HTTP_204_NO_CONTENT) self.assertEqual(response.content, six.b('')) ids = [obj.id for obj in self.objects.all()] self.assertEqual(ids, [2, 3]) def test_get_instance_view_incorrect_arg(self): """ GET requests with an incorrect pk type, should raise 404, not 500. Regression test for #890. """ request = factory.get('/a') with self.assertNumQueries(0): response = self.view(request, pk='a').render() self.assertEqual(response.status_code, status.HTTP_404_NOT_FOUND) def test_put_cannot_set_id(self): """ PUT requests to create a new object should not be able to set the id. """ data = {'id': 999, 'text': 'foobar'} request = factory.put('/1', data, format='json') with self.assertNumQueries(EXPECTED_QUERIES_FOR_PUT): response = self.view(request, pk=1).render() self.assertEqual(response.status_code, status.HTTP_200_OK) self.assertEqual(response.data, {'id': 1, 'text': 'foobar'}) updated = self.objects.get(id=1) self.assertEqual(updated.text, 'foobar') def test_put_to_deleted_instance(self): """ PUT requests to RetrieveUpdateDestroyAPIView should return 404 if an object does not currently exist. """ self.objects.get(id=1).delete() data = {'text': 'foobar'} request = factory.put('/1', data, format='json') with self.assertNumQueries(1): response = self.view(request, pk=1).render() self.assertEqual(response.status_code, status.HTTP_404_NOT_FOUND) def test_put_to_filtered_out_instance(self): """ PUT requests to an URL of instance which is filtered out should not be able to create new objects. """ data = {'text': 'foo'} filtered_out_pk = BasicModel.objects.filter(text='filtered out')[0].pk request = factory.put('/{0}'.format(filtered_out_pk), data, format='json') response = self.view(request, pk=filtered_out_pk).render() self.assertEqual(response.status_code, status.HTTP_404_NOT_FOUND) def test_patch_cannot_create_an_object(self): """ PATCH requests should not be able to create objects. """ data = {'text': 'foobar'} request = factory.patch('/999', data, format='json') with self.assertNumQueries(1): response = self.view(request, pk=999).render() self.assertEqual(response.status_code, status.HTTP_404_NOT_FOUND) self.assertFalse(self.objects.filter(id=999).exists()) def test_put_error_instance_view(self): """ Incorrect PUT requests in HTML should include a form error. """ data = {'text': 'foobar' * 100} request = factory.put('/', data, HTTP_ACCEPT='text/html') response = self.view(request, pk=1).render() expected_error = 'Ensure this field has no more than 100 characters.' self.assertIn(expected_error, response.rendered_content.decode('utf-8')) class TestFKInstanceView(TestCase): def setUp(self): """ Create 3 BasicModel instances. """ items = ['foo', 'bar', 'baz'] for item in items: t = ForeignKeyTarget(name=item) t.save() ForeignKeySource(name='source_' + item, target=t).save() self.objects = ForeignKeySource.objects self.data = [ {'id': obj.id, 'name': obj.name} for obj in self.objects.all() ] self.view = FKInstanceView.as_view() class TestOverriddenGetObject(TestCase): """ Test cases for a RetrieveUpdateDestroyAPIView that does NOT use the queryset/model mechanism but instead overrides get_object() """ def setUp(self): """ Create 3 BasicModel instances. """ items = ['foo', 'bar', 'baz'] for item in items: BasicModel(text=item).save() self.objects = BasicModel.objects self.data = [ {'id': obj.id, 'text': obj.text} for obj in self.objects.all() ] class OverriddenGetObjectView(generics.RetrieveUpdateDestroyAPIView): """ Example detail view for override of get_object(). """ serializer_class = BasicSerializer def get_object(self): pk = int(self.kwargs['pk']) return get_object_or_404(BasicModel.objects.all(), id=pk) self.view = OverriddenGetObjectView.as_view() def test_overridden_get_object_view(self): """ GET requests to RetrieveUpdateDestroyAPIView should return a single object. """ request = factory.get('/1') with self.assertNumQueries(1): response = self.view(request, pk=1).render() self.assertEqual(response.status_code, status.HTTP_200_OK) self.assertEqual(response.data, self.data[0]) # Regression test for #285 class CommentSerializer(serializers.ModelSerializer): class Meta: model = Comment exclude = ('created',) class CommentView(generics.ListCreateAPIView): serializer_class = CommentSerializer model = Comment class TestCreateModelWithAutoNowAddField(TestCase): def setUp(self): self.objects = Comment.objects self.view = CommentView.as_view() def test_create_model_with_auto_now_add_field(self): """ Regression test for #285 https://github.com/tomchristie/django-rest-framework/issues/285 """ data = {'email': 'foobar@example.com', 'content': 'foobar'} request = factory.post('/', data, format='json') response = self.view(request).render() self.assertEqual(response.status_code, status.HTTP_201_CREATED) created = self.objects.get(id=1) self.assertEqual(created.content, 'foobar') # Test for particularly ugly regression with m2m in browsable API class ClassB(models.Model): name = models.CharField(max_length=255) class ClassA(models.Model): name = models.CharField(max_length=255) children = models.ManyToManyField(ClassB, blank=True, null=True) class ClassASerializer(serializers.ModelSerializer): children = serializers.PrimaryKeyRelatedField( many=True, queryset=ClassB.objects.all() ) class Meta: model = ClassA class ExampleView(generics.ListCreateAPIView): serializer_class = ClassASerializer queryset = ClassA.objects.all() class TestM2MBrowsableAPI(TestCase): def test_m2m_in_browsable_api(self): """ Test for particularly ugly regression with m2m in browsable API """ request = factory.get('/', HTTP_ACCEPT='text/html') view = ExampleView().as_view() response = view(request).render() self.assertEqual(response.status_code, status.HTTP_200_OK) class InclusiveFilterBackend(object): def filter_queryset(self, request, queryset, view): return queryset.filter(text='foo') class ExclusiveFilterBackend(object): def filter_queryset(self, request, queryset, view): return queryset.filter(text='other') class TwoFieldModel(models.Model): field_a = models.CharField(max_length=100) field_b = models.CharField(max_length=100) class DynamicSerializerView(generics.ListCreateAPIView): queryset = TwoFieldModel.objects.all() renderer_classes = (renderers.BrowsableAPIRenderer, renderers.JSONRenderer) def get_serializer_class(self): if self.request.method == 'POST': class DynamicSerializer(serializers.ModelSerializer): class Meta: model = TwoFieldModel fields = ('field_b',) else: class DynamicSerializer(serializers.ModelSerializer): class Meta: model = TwoFieldModel return DynamicSerializer class TestFilterBackendAppliedToViews(TestCase): def setUp(self): """ Create 3 BasicModel instances to filter on. """ items = ['foo', 'bar', 'baz'] for item in items: BasicModel(text=item).save() self.objects = BasicModel.objects self.data = [ {'id': obj.id, 'text': obj.text} for obj in self.objects.all() ] def test_get_root_view_filters_by_name_with_filter_backend(self): """ GET requests to ListCreateAPIView should return filtered list. """ root_view = RootView.as_view(filter_backends=(InclusiveFilterBackend,)) request = factory.get('/') response = root_view(request).render() self.assertEqual(response.status_code, status.HTTP_200_OK) self.assertEqual(len(response.data), 1) self.assertEqual(response.data, [{'id': 1, 'text': 'foo'}]) def test_get_root_view_filters_out_all_models_with_exclusive_filter_backend(self): """ GET requests to ListCreateAPIView should return empty list when all models are filtered out. """ root_view = RootView.as_view(filter_backends=(ExclusiveFilterBackend,)) request = factory.get('/') response = root_view(request).render() self.assertEqual(response.status_code, status.HTTP_200_OK) self.assertEqual(response.data, []) def test_get_instance_view_filters_out_name_with_filter_backend(self): """ GET requests to RetrieveUpdateDestroyAPIView should raise 404 when model filtered out. """ instance_view = InstanceView.as_view(filter_backends=(ExclusiveFilterBackend,)) request = factory.get('/1') response = instance_view(request, pk=1).render() self.assertEqual(response.status_code, status.HTTP_404_NOT_FOUND) self.assertEqual(response.data, {'detail': 'Not found.'}) def test_get_instance_view_will_return_single_object_when_filter_does_not_exclude_it(self): """ GET requests to RetrieveUpdateDestroyAPIView should return a single object when not excluded """ instance_view = InstanceView.as_view(filter_backends=(InclusiveFilterBackend,)) request = factory.get('/1') response = instance_view(request, pk=1).render() self.assertEqual(response.status_code, status.HTTP_200_OK) self.assertEqual(response.data, {'id': 1, 'text': 'foo'}) def test_dynamic_serializer_form_in_browsable_api(self): """ GET requests to ListCreateAPIView should return filtered list. """ view = DynamicSerializerView.as_view() request = factory.get('/') response = view(request).render() self.assertContains(response, 'field_b') self.assertNotContains(response, 'field_a') class TestGuardedQueryset(TestCase): def test_guarded_queryset(self): class QuerysetAccessError(generics.ListAPIView): queryset = BasicModel.objects.all() def get(self, request): return Response(list(self.queryset)) view = QuerysetAccessError.as_view() request = factory.get('/') with pytest.raises(RuntimeError): view(request).render()