Merge branch 'master' into schema-support

docs/api-guide/authentication.md

@@ -207,6 +207,10 @@ The `obtain_auth_token` view will return a JSON response when valid `username` a
 
 Note that the default `obtain_auth_token` view explicitly uses JSON requests and responses, rather than using default renderer and parser classes in your settings.  If you need a customized version of the `obtain_auth_token` view, you can do so by overriding the `ObtainAuthToken` view class, and using that in your url conf instead.
 
+By default there are no permissions or throttling applied to the  `obtain_auth_token` view. If you do wish to apply throttling you'll need to override the view class,
+and include them using the `throttle_classes` attribute.
+
+
 ##### With Django admin
 
 It is also possible to create Tokens manually through admin interface. In case you are using a large user base, we recommend that you monkey patch the `TokenAdmin` class to customize it to your needs, more specifically by declaring the `user` field as `raw_field`.

docs/api-guide/validators.md

@@ -156,7 +156,7 @@ If you want the date field to be entirely hidden from the user, then use `Hidden
 
 ---
 
-# Advanced 'default' argument usage
+# Advanced field defaults
 
 Validators that are applied across multiple fields in the serializer can sometimes require a field input that should not be provided by the API client, but that *is* available as input to the validator.
 
@@ -188,6 +188,71 @@ It takes a single argument, which is the default value or callable that should b
 
 ---
 
+# Limitations of validators
+
+There are some ambiguous cases where you'll need to instead handle validation
+explicitly, rather than relying on the default serializer classes that
+`ModelSerializer` generates.
+
+In these cases you may want to disable the automatically generated validators,
+by specifying an empty list for the serializer `Meta.validators` attribute.
+
+## Optional fields
+
+By default "unique together" validation enforces that all fields be
+`required=True`. In some cases, you might want to explicit apply
+`required=False` to one of the fields, in which case the desired behaviour
+of the validation is ambiguous.
+
+In this case you will typically need to exclude the validator from the
+serializer class, and instead write any validation logic explicitly, either
+in the `.validate()` method, or else in the view.
+
+For example:
+
+    class BillingRecordSerializer(serializers.ModelSerializer):
+        def validate(self, data):
+            # Apply custom validation either here, or in the view.
+
+        class Meta:
+            fields = ('client', 'date', 'amount')
+            extra_kwargs = {'client' {'required': 'False'}}
+            validators = []  # Remove a default "unique together" constraint.
+
+## Updating nested serializers
+
+When applying an update to an existing instance, uniqueness validators will
+exclude the current instance from the uniqueness check. The current instance
+is available in the context of the uniqueness check, because it exists as
+an attribute on the serializer, having initially been passed using
+`instance=...` when instantiating the serializer.
+
+In the case of update operations on *nested* serializers there's no way of
+applying this exclusion, because the instance is not available.
+
+Again, you'll probably want to explicitly remove the validator from the
+serializer class, and write the code the for the validation constraint
+explicitly, in a `.validate()` method, or in the view.
+
+## Debugging complex cases
+
+If you're not sure exactly what behavior a `ModelSerializer` class will
+generate it is usually a good idea to run `manage.py shell`, and print
+an instance of the serializer, so that you can inspect the fields and
+validators that it automatically generates for you.
+
+    >>> serializer = MyComplexModelSerializer()
+    >>> print(serializer)
+    class MyComplexModelSerializer:
+        my_fields = ...
+
+Also keep in mind that with complex cases it can often be better to explicitly
+define your serializer classes, rather than relying on the default
+`ModelSerializer` behavior. This involves a little more code, but ensures
+that the resulting behavior is more transparent.
+
+---
+
 # Writing custom validators
 
 You can use any of Django's existing validators, or write your own custom validators.

docs/tutorial/quickstart.md

@@ -130,7 +130,7 @@ Okay, we're done.
 
 We're now ready to test the API we've built.  Let's fire up the server from the command line.
 
-    python ./manage.py runserver
+    python manage.py runserver
 
 We can now access our API, both from the command-line, using tools like `curl`...
 
@@ -182,7 +182,7 @@ Or using the [httpie][httpie], command line tool...
     }
 
 
-Or directly through the browser...
+Or directly through the browser, by going to the URL `http://127.0.0.1:8000/users/`...
 
 ![Quick start image][image]
 

rest_framework/authtoken/models.py

@@ -6,12 +6,6 @@ from django.db import models
 from django.utils.encoding import python_2_unicode_compatible
 from django.utils.translation import ugettext_lazy as _
 
-# Prior to Django 1.5, the AUTH_USER_MODEL setting does not exist.
-# Note that we don't perform this code in the compat module due to
-# bug report #1297
-# See: https://github.com/tomchristie/django-rest-framework/issues/1297
-AUTH_USER_MODEL = getattr(settings, 'AUTH_USER_MODEL', 'auth.User')
-
 
 @python_2_unicode_compatible
 class Token(models.Model):
@@ -19,8 +13,10 @@ class Token(models.Model):
     The default authorization token model.
     """
     key = models.CharField(_("Key"), max_length=40, primary_key=True)
-    user = models.OneToOneField(AUTH_USER_MODEL, related_name='auth_token',
-                                on_delete=models.CASCADE, verbose_name=_("User"))
+    user = models.OneToOneField(
+        settings.AUTH_USER_MODEL, related_name='auth_token',
+        on_delete=models.CASCADE, verbose_name=_("User")
+    )
     created = models.DateTimeField(_("Created"), auto_now_add=True)
 
     class Meta:

rest_framework/pagination.py

@@ -319,6 +319,7 @@ class LimitOffsetPagination(BasePagination):
             try:
                 return _positive_int(
                     request.query_params[self.limit_query_param],
+                    strict=True,
                     cutoff=self.max_limit
                 )
             except (KeyError, ValueError):

rest_framework/renderers.py

@@ -473,8 +473,11 @@ class BrowsableAPIRenderer(BaseRenderer):
                 return
 
             if existing_serializer is not None:
-                serializer = existing_serializer
-            else:
+                try:
+                    return self.render_form_for_serializer(existing_serializer)
+                except TypeError:
+                    pass
+
             if has_serializer:
                 if method in ('PUT', 'PATCH'):
                     serializer = view.get_serializer(instance=instance, **kwargs)
@@ -489,6 +492,9 @@ class BrowsableAPIRenderer(BaseRenderer):
                     serializer = self._get_serializer(view.serializer_class, view,
                                                       request, **kwargs)
 
+            return self.render_form_for_serializer(serializer)
+
+    def render_form_for_serializer(self, serializer):
         if hasattr(serializer, 'initial_data'):
             serializer.is_valid()
 

rest_framework/serializers.py

@@ -667,6 +667,28 @@ class ListSerializer(BaseSerializer):
 
         return self.instance
 
+    def is_valid(self, raise_exception=False):
+        # This implementation is the same as the default,
+        # except that we use lists, rather than dicts, as the empty case.
+        assert hasattr(self, 'initial_data'), (
+            'Cannot call `.is_valid()` as no `data=` keyword argument was '
+            'passed when instantiating the serializer instance.'
+        )
+
+        if not hasattr(self, '_validated_data'):
+            try:
+                self._validated_data = self.run_validation(self.initial_data)
+            except ValidationError as exc:
+                self._validated_data = []
+                self._errors = exc.detail
+            else:
+                self._errors = []
+
+        if self._errors and raise_exception:
+            raise ValidationError(self.errors)
+
+        return not bool(self._errors)
+
     def __repr__(self):
         return unicode_to_repr(representation.list_repr(self, indent=1))
 
@@ -1221,6 +1243,11 @@ class ModelSerializer(Serializer):
 
         read_only_fields = getattr(self.Meta, 'read_only_fields', None)
         if read_only_fields is not None:
+            if not isinstance(read_only_fields, (list, tuple)):
+                raise TypeError(
+                    'The `read_only_fields` option must be a list or tuple. '
+                    'Got %s.' % type(read_only_fields).__name__
+                )
             for field_name in read_only_fields:
                 kwargs = extra_kwargs.get(field_name, {})
                 kwargs['read_only'] = True
@@ -1236,6 +1263,9 @@ class ModelSerializer(Serializer):
 
         ('dict of updated extra kwargs', 'mapping of hidden fields')
         """
+        if getattr(self.Meta, 'validators', None) is not None:
+            return (extra_kwargs, {})
+
         model = getattr(self.Meta, 'model')
         model_fields = self._get_model_fields(
             field_names, declared_fields, extra_kwargs
@@ -1286,7 +1316,7 @@ class ModelSerializer(Serializer):
                 else:
                     uniqueness_extra_kwargs[unique_constraint_name] = {'default': default}
             elif default is not empty:
-                # The corresponding field is not present in the,
+                # The corresponding field is not present in the
                 # serializer. We have a default to use for it, so
                 # add in a hidden field that populates it.
                 hidden_fields[unique_constraint_name] = HiddenField(default=default)
@@ -1368,6 +1398,7 @@ class ModelSerializer(Serializer):
         field_names = {
             field.source for field in self.fields.values()
             if (field.source != '*') and ('.' not in field.source)
+            and not field.read_only
         }
 
         # Note that we make sure to check `unique_together` both on the

rest_framework/utils/encoders.py

@@ -51,6 +51,9 @@ class JSONEncoder(json.JSONEncoder):
             return six.text_type(obj)
         elif isinstance(obj, QuerySet):
             return tuple(obj)
+        elif isinstance(obj, six.binary_type):
+            # Best-effort for binary blobs. See #4187.
+            return obj.decode('utf-8')
         elif hasattr(obj, 'tolist'):
             # Numpy arrays and array scalars.
             return obj.tolist()

tests/browsable_api/test_form_rendering.py

@@ -0,0 +1,53 @@
+from django.test import TestCase
+
+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
+
+factory = APIRequestFactory()
+
+
+class BasicSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = BasicModel
+
+
+class ManyPostView(generics.GenericAPIView):
+    queryset = BasicModel.objects.all()
+    serializer_class = BasicSerializer
+    renderer_classes = (renderers.BrowsableAPIRenderer, renderers.JSONRenderer)
+
+    def post(self, request, *args, **kwargs):
+        serializer = self.get_serializer(self.get_queryset(), many=True)
+        return Response(serializer.data, status.HTTP_200_OK)
+
+
+class TestManyPostView(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 = ManyPostView.as_view()
+
+    def test_post_many_post_view(self):
+        """
+        POST request to a view that returns a list of objects should
+        still successfully return the browsable API with a rendered form.
+
+        Regression test for https://github.com/tomchristie/django-rest-framework/pull/3164
+        """
+        data = {}
+        request = factory.post('/', data, format='json')
+        with self.assertNumQueries(1):
+            response = self.view(request).render()
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.assertEqual(len(response.data), 3)

tests/test_model_serializer.py

@@ -521,8 +521,6 @@ class TestRelationalFieldMappings(TestCase):
                 one_to_one = NestedSerializer(read_only=True):
                     url = HyperlinkedIdentityField(view_name='onetoonetargetmodel-detail')
                     name = CharField(max_length=100)
-                class Meta:
-                    validators = [<UniqueTogetherValidator(queryset=UniqueTogetherModel.objects.all(), fields=('foreign_key', 'one_to_one'))>]
         """)
         if six.PY2:
             # This case is also too awkward to resolve fully across both py2

tests/test_pagination.py

@@ -486,6 +486,19 @@ class TestLimitOffset:
         assert queryset == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
         assert content.get('next') == next_url
 
+    def test_zero_limit(self):
+        """
+        An zero limit query param should be ignored in favor of the default.
+        """
+        request = Request(factory.get('/', {'limit': 0, 'offset': 0}))
+        queryset = self.paginate_queryset(request)
+        content = self.get_paginated_content(queryset)
+        next_limit = self.pagination.default_limit
+        next_offset = self.pagination.default_limit
+        next_url = 'http://testserver/?limit={0}&offset={1}'.format(next_limit, next_offset)
+        assert queryset == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+        assert content.get('next') == next_url
+
     def test_max_limit(self):
         """
         The limit defaults to the max_limit when there is a max_limit and the
@@ -505,31 +518,6 @@ class TestLimitOffset:
         assert content.get('next') == next_url
         assert content.get('previous') == prev_url
 
-    def test_limit_zero(self):
-        """
-        A limit of 0 should return empty results.
-        """
-        request = Request(factory.get('/', {'limit': 0, 'offset': 10}))
-        queryset = self.paginate_queryset(request)
-        context = self.get_html_context()
-        content = self.get_paginated_content(queryset)
-
-        assert context == {
-            'previous_url': 'http://testserver/?limit=0&offset=10',
-            'page_links': [
-                PageLink(
-                    url='http://testserver/?limit=0',
-                    number=1,
-                    is_active=True,
-                    is_break=False
-                )
-            ],
-            'next_url': 'http://testserver/?limit=0&offset=10'
-        }
-
-        assert queryset == []
-        assert content.get('results') == []
-
 
 class TestCursorPagination:
     """

tests/test_relations_pk.py

@@ -340,6 +340,18 @@ class PKForeignKeyTests(TestCase):
         serializer = NullableForeignKeySourceSerializer()
         self.assertEqual(serializer.data['target'], None)
 
+    def test_foreign_key_not_required(self):
+        """
+        Let's say we wanted to fill the non-nullable model field inside
+        Model.save(), we would make it empty and not required.
+        """
+        class ModelSerializer(ForeignKeySourceSerializer):
+            class Meta(ForeignKeySourceSerializer.Meta):
+                extra_kwargs = {'target': {'required': False}}
+        serializer = ModelSerializer(data={'name': 'test'})
+        serializer.is_valid(raise_exception=True)
+        self.assertNotIn('target', serializer.validated_data)
+
 
 class PKNullableForeignKeyTests(TestCase):
     def setUp(self):

tests/test_serializer_bulk_update.py

@@ -46,6 +46,7 @@ class BulkCreateSerializerTests(TestCase):
         serializer = self.BookSerializer(data=data, many=True)
         self.assertEqual(serializer.is_valid(), True)
         self.assertEqual(serializer.validated_data, data)
+        self.assertEqual(serializer.errors, [])
 
     def test_bulk_create_errors(self):
         """
@@ -76,6 +77,7 @@ class BulkCreateSerializerTests(TestCase):
         serializer = self.BookSerializer(data=data, many=True)
         self.assertEqual(serializer.is_valid(), False)
         self.assertEqual(serializer.errors, expected_errors)
+        self.assertEqual(serializer.validated_data, [])
 
     def test_invalid_list_datatype(self):
         """

tests/test_validators.py

@@ -239,6 +239,45 @@ class TestUniquenessTogetherValidation(TestCase):
         """)
         assert repr(serializer) == expected
 
+    def test_ignore_read_only_fields(self):
+        """
+        When serializer fields are read only, then uniqueness
+        validators should not be added for that field.
+        """
+        class ReadOnlyFieldSerializer(serializers.ModelSerializer):
+            class Meta:
+                model = UniquenessTogetherModel
+                fields = ('id', 'race_name', 'position')
+                read_only_fields = ('race_name',)
+
+        serializer = ReadOnlyFieldSerializer()
+        expected = dedent("""
+            ReadOnlyFieldSerializer():
+                id = IntegerField(label='ID', read_only=True)
+                race_name = CharField(read_only=True)
+                position = IntegerField(required=True)
+        """)
+        assert repr(serializer) == expected
+
+    def test_allow_explict_override(self):
+        """
+        Ensure validators can be explicitly removed..
+        """
+        class NoValidatorsSerializer(serializers.ModelSerializer):
+            class Meta:
+                model = UniquenessTogetherModel
+                fields = ('id', 'race_name', 'position')
+                validators = []
+
+        serializer = NoValidatorsSerializer()
+        expected = dedent("""
+            NoValidatorsSerializer():
+                id = IntegerField(label='ID', read_only=True)
+                race_name = CharField(max_length=100)
+                position = IntegerField()
+        """)
+        assert repr(serializer) == expected
+
     def test_ignore_validation_for_null_fields(self):
         # None values that are on fields which are part of the uniqueness
         # constraint cause the instance to ignore uniqueness validation.

tox.ini

@@ -15,7 +15,7 @@ setenv =
        PYTHONWARNINGS=once
 deps =
         django18: Django==1.8.13
-        django19: Django==1.9.6
+        django19: Django==1.9.7
         django110: Django==1.10a1
         -rrequirements/requirements-testing.txt
         -rrequirements/requirements-optionals.txt