From 5e8fe6edf0b25506c5bc3ce749c5b9d5cb9e7e7e Mon Sep 17 00:00:00 2001
From: Erwan Rouchet <rouchet@teklia.com>
Date: Wed, 6 Nov 2019 18:34:28 +0100
Subject: [PATCH 1/6] Fix link to Django docs (#7040)

---
 docs/api-guide/responses.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/api-guide/responses.md b/docs/api-guide/responses.md
index 1a56b0101..dbdc8ff2c 100644
--- a/docs/api-guide/responses.md
+++ b/docs/api-guide/responses.md
@@ -94,5 +94,5 @@ As with any other `TemplateResponse`, this method is called to render the serial
 
 You won't typically need to call `.render()` yourself, as it's handled by Django's standard response cycle.
 
-[cite]: https://docs.djangoproject.com/en/stable/stable/template-response/
+[cite]: https://docs.djangoproject.com/en/stable/ref/template-response/
 [statuscodes]: status-codes.md

From 14d740d08800397015ce89e43aec4ee0bbf29c04 Mon Sep 17 00:00:00 2001
From: Aaron Yong <a.yong91@gmail.com>
Date: Wed, 6 Nov 2019 13:37:13 -0700
Subject: [PATCH 2/6] Update DEFAULT_SCHEMA_CLASSES default value in Settings
 docs (#7014)

The default value was changed to point to the OpenAPI AutoSchema class.  The docs were leading users to believe that rest_framework.schemas.AutoSchema was the default.  As of this commit, the root AutoSchema is in fact imported from the coreapi module.
---
 docs/api-guide/settings.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/api-guide/settings.md b/docs/api-guide/settings.md
index 768e343a7..d42000260 100644
--- a/docs/api-guide/settings.md
+++ b/docs/api-guide/settings.md
@@ -101,7 +101,7 @@ Default: `'rest_framework.negotiation.DefaultContentNegotiation'`
 
 A view inspector class that will be used for schema generation.
 
-Default: `'rest_framework.schemas.AutoSchema'`
+Default: `'rest_framework.schemas.openapi.AutoSchema'`
 
 ---
 

From 8b06ce72d7414a62bb1a7da0c5aec24ec16e811d Mon Sep 17 00:00:00 2001
From: Dima Knivets <knivets@users.noreply.github.com>
Date: Wed, 6 Nov 2019 22:44:51 +0200
Subject: [PATCH 3/6] OpenAPI: Map renderers/parsers for request/response
 media-types. (#6865)

---
 rest_framework/schemas/openapi.py | 34 +++++++++++---
 tests/schemas/test_openapi.py     | 73 +++++++++++++++++++++++++++++++
 2 files changed, 102 insertions(+), 5 deletions(-)

diff --git a/rest_framework/schemas/openapi.py b/rest_framework/schemas/openapi.py
index a3970ff7a..a67974ed6 100644
--- a/rest_framework/schemas/openapi.py
+++ b/rest_framework/schemas/openapi.py
@@ -1,4 +1,5 @@
 import warnings
+from operator import attrgetter
 from urllib.parse import urljoin
 
 from django.core.validators import (
@@ -8,7 +9,7 @@ from django.core.validators import (
 from django.db import models
 from django.utils.encoding import force_str
 
-from rest_framework import exceptions, serializers
+from rest_framework import exceptions, renderers, serializers
 from rest_framework.compat import uritemplate
 from rest_framework.fields import _UnvalidatedField, empty
 
@@ -78,7 +79,9 @@ class SchemaGenerator(BaseSchemaGenerator):
 
 class AutoSchema(ViewInspector):
 
-    content_types = ['application/json']
+    request_media_types = []
+    response_media_types = []
+
     method_mapping = {
         'get': 'Retrieve',
         'post': 'Create',
@@ -339,6 +342,12 @@ class AutoSchema(ViewInspector):
             self._map_min_max(field, content)
             return content
 
+        if isinstance(field, serializers.FileField):
+            return {
+                'type': 'string',
+                'format': 'binary'
+            }
+
         # Simplest cases, default to 'string' type:
         FIELD_CLASS_SCHEMA_TYPE = {
             serializers.BooleanField: 'boolean',
@@ -434,9 +443,20 @@ class AutoSchema(ViewInspector):
         pagination_class = getattr(self.view, 'pagination_class', None)
         if pagination_class:
             return pagination_class()
-
         return None
 
+    def map_parsers(self, path, method):
+        return list(map(attrgetter('media_type'), self.view.parser_classes))
+
+    def map_renderers(self, path, method):
+        media_types = []
+        for renderer in self.view.renderer_classes:
+            # BrowsableAPIRenderer not relevant to OpenAPI spec
+            if renderer == renderers.BrowsableAPIRenderer:
+                continue
+            media_types.append(renderer.media_type)
+        return media_types
+
     def _get_serializer(self, method, path):
         view = self.view
 
@@ -456,6 +476,8 @@ class AutoSchema(ViewInspector):
         if method not in ('PUT', 'PATCH', 'POST'):
             return {}
 
+        self.request_media_types = self.map_parsers(path, method)
+
         serializer = self._get_serializer(path, method)
 
         if not isinstance(serializer, serializers.Serializer):
@@ -473,7 +495,7 @@ class AutoSchema(ViewInspector):
         return {
             'content': {
                 ct: {'schema': content}
-                for ct in self.content_types
+                for ct in self.request_media_types
             }
         }
 
@@ -486,6 +508,8 @@ class AutoSchema(ViewInspector):
                 }
             }
 
+        self.response_media_types = self.map_renderers(path, method)
+
         item_schema = {}
         serializer = self._get_serializer(path, method)
 
@@ -513,7 +537,7 @@ class AutoSchema(ViewInspector):
             '200': {
                 'content': {
                     ct: {'schema': response_schema}
-                    for ct in self.content_types
+                    for ct in self.response_media_types
                 },
                 # description is a mandatory property,
                 # https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#responseObject
diff --git a/tests/schemas/test_openapi.py b/tests/schemas/test_openapi.py
index 78c00d985..bbdae0fed 100644
--- a/tests/schemas/test_openapi.py
+++ b/tests/schemas/test_openapi.py
@@ -5,6 +5,8 @@ from django.utils.translation import gettext_lazy as _
 
 from rest_framework import filters, generics, pagination, routers, serializers
 from rest_framework.compat import uritemplate
+from rest_framework.parsers import JSONParser, MultiPartParser
+from rest_framework.renderers import JSONRenderer
 from rest_framework.request import Request
 from rest_framework.schemas.openapi import AutoSchema, SchemaGenerator
 
@@ -364,6 +366,77 @@ class TestOperationIntrospection(TestCase):
             },
         }
 
+    def test_parser_mapping(self):
+        """Test that view's parsers are mapped to OA media types"""
+        path = '/{id}/'
+        method = 'POST'
+
+        class View(generics.CreateAPIView):
+            serializer_class = views.ExampleSerializer
+            parser_classes = [JSONParser, MultiPartParser]
+
+        view = create_view(
+            View,
+            method,
+            create_request(path),
+        )
+        inspector = AutoSchema()
+        inspector.view = view
+
+        request_body = inspector._get_request_body(path, method)
+
+        assert len(request_body['content'].keys()) == 2
+        assert 'multipart/form-data' in request_body['content']
+        assert 'application/json' in request_body['content']
+
+    def test_renderer_mapping(self):
+        """Test that view's renderers are mapped to OA media types"""
+        path = '/{id}/'
+        method = 'GET'
+
+        class View(generics.CreateAPIView):
+            serializer_class = views.ExampleSerializer
+            renderer_classes = [JSONRenderer]
+
+        view = create_view(
+            View,
+            method,
+            create_request(path),
+        )
+        inspector = AutoSchema()
+        inspector.view = view
+
+        responses = inspector._get_responses(path, method)
+        # TODO this should be changed once the multiple response
+        # schema support is there
+        success_response = responses['200']
+
+        assert len(success_response['content'].keys()) == 1
+        assert 'application/json' in success_response['content']
+
+    def test_serializer_filefield(self):
+        path = '/{id}/'
+        method = 'POST'
+
+        class ItemSerializer(serializers.Serializer):
+            attachment = serializers.FileField()
+
+        class View(generics.CreateAPIView):
+            serializer_class = ItemSerializer
+
+        view = create_view(
+            View,
+            method,
+            create_request(path),
+        )
+        inspector = AutoSchema()
+        inspector.view = view
+
+        request_body = inspector._get_request_body(path, method)
+        mp_media = request_body['content']['multipart/form-data']
+        attachment = mp_media['schema']['properties']['attachment']
+        assert attachment['format'] == 'binary'
+
     def test_retrieve_response_body_generation(self):
         """
         Test that a list of properties is returned for retrieve item views.

From becb96216025a9e030f59f7bbab4e22daa5b0e3f Mon Sep 17 00:00:00 2001
From: Kentalot <Kentalot@users.noreply.github.com>
Date: Wed, 6 Nov 2019 12:46:19 -0800
Subject: [PATCH 4/6] OpenAPI: Use int64 format for large integers. (#7018)

---
 rest_framework/schemas/openapi.py | 11 +++++++++--
 tests/schemas/test_openapi.py     |  4 ++++
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/rest_framework/schemas/openapi.py b/rest_framework/schemas/openapi.py
index a67974ed6..0d45e27cf 100644
--- a/rest_framework/schemas/openapi.py
+++ b/rest_framework/schemas/openapi.py
@@ -268,9 +268,13 @@ class AutoSchema(ViewInspector):
                 'items': {},
             }
             if not isinstance(field.child, _UnvalidatedField):
-                mapping['items'] = {
-                    "type": self._map_field(field.child).get('type')
+                map_field = self._map_field(field.child)
+                items = {
+                    "type": map_field.get('type')
                 }
+                if 'format' in map_field:
+                    items['format'] = map_field.get('format')
+                mapping['items'] = items
             return mapping
 
         # DateField and DateTimeField type is string
@@ -340,6 +344,9 @@ class AutoSchema(ViewInspector):
                 'type': 'integer'
             }
             self._map_min_max(field, content)
+            # 2147483647 is max for int32_size, so we use int64 for format
+            if int(content.get('maximum', 0)) > 2147483647 or int(content.get('minimum', 0)) > 2147483647:
+                content['format'] = 'int64'
             return content
 
         if isinstance(field, serializers.FileField):
diff --git a/tests/schemas/test_openapi.py b/tests/schemas/test_openapi.py
index bbdae0fed..fc22c32ab 100644
--- a/tests/schemas/test_openapi.py
+++ b/tests/schemas/test_openapi.py
@@ -50,6 +50,10 @@ class TestFieldMapping(TestCase):
             (serializers.ListField(child=serializers.BooleanField()), {'items': {'type': 'boolean'}, 'type': 'array'}),
             (serializers.ListField(child=serializers.FloatField()), {'items': {'type': 'number'}, 'type': 'array'}),
             (serializers.ListField(child=serializers.CharField()), {'items': {'type': 'string'}, 'type': 'array'}),
+            (serializers.ListField(child=serializers.IntegerField(max_value=4294967295)),
+             {'items': {'type': 'integer', 'format': 'int64'}, 'type': 'array'}),
+            (serializers.IntegerField(min_value=2147483648),
+             {'type': 'integer', 'minimum': 2147483648, 'format': 'int64'}),
         ]
         for field, mapping in cases:
             with self.subTest(field=field):

From 7c3477dcdae558b40acfa116ed08eeb5700818eb Mon Sep 17 00:00:00 2001
From: Yann Savary <ysavary@users.noreply.github.com>
Date: Wed, 6 Nov 2019 21:52:02 +0100
Subject: [PATCH 5/6] OpenAPI: Ported docstring operation description from
 CoreAPI inspector. (#6898)

---
 rest_framework/schemas/coreapi.py    | 48 +---------------------------
 rest_framework/schemas/inspectors.py | 46 ++++++++++++++++++++++++++
 rest_framework/schemas/openapi.py    |  3 +-
 tests/schemas/test_openapi.py        | 40 ++++++++++++++++-------
 tests/schemas/views.py               | 24 ++++++++++++++
 5 files changed, 100 insertions(+), 61 deletions(-)

diff --git a/rest_framework/schemas/coreapi.py b/rest_framework/schemas/coreapi.py
index d811da2d8..75ed5671a 100644
--- a/rest_framework/schemas/coreapi.py
+++ b/rest_framework/schemas/coreapi.py
@@ -1,26 +1,18 @@
-import re
 import warnings
 from collections import Counter, OrderedDict
 from urllib import parse
 
 from django.db import models
-from django.utils.encoding import force_str, smart_text
+from django.utils.encoding import force_str
 
 from rest_framework import exceptions, serializers
 from rest_framework.compat import coreapi, coreschema, uritemplate
 from rest_framework.settings import api_settings
-from rest_framework.utils import formatting
 
 from .generators import BaseSchemaGenerator
 from .inspectors import ViewInspector
 from .utils import get_pk_description, is_list_view
 
-# Used in _get_description_section()
-# TODO: ???: move up to base.
-header_regex = re.compile('^[a-zA-Z][0-9A-Za-z_]*:')
-
-# Generator #
-
 
 def common_path(paths):
     split_paths = [path.strip('/').split('/') for path in paths]
@@ -397,44 +389,6 @@ class AutoSchema(ViewInspector):
             description=description
         )
 
-    def get_description(self, path, method):
-        """
-        Determine a link description.
-
-        This will be based on the method docstring if one exists,
-        or else the class docstring.
-        """
-        view = self.view
-
-        method_name = getattr(view, 'action', method.lower())
-        method_docstring = getattr(view, method_name, None).__doc__
-        if method_docstring:
-            # An explicit docstring on the method or action.
-            return self._get_description_section(view, method.lower(), formatting.dedent(smart_text(method_docstring)))
-        else:
-            return self._get_description_section(view, getattr(view, 'action', method.lower()), view.get_view_description())
-
-    def _get_description_section(self, view, header, description):
-        lines = [line for line in description.splitlines()]
-        current_section = ''
-        sections = {'': ''}
-
-        for line in lines:
-            if header_regex.match(line):
-                current_section, seperator, lead = line.partition(':')
-                sections[current_section] = lead.strip()
-            else:
-                sections[current_section] += '\n' + line
-
-        # TODO: SCHEMA_COERCE_METHOD_NAMES appears here and in `SchemaGenerator.get_keys`
-        coerce_method_names = api_settings.SCHEMA_COERCE_METHOD_NAMES
-        if header in sections:
-            return sections[header].strip()
-        if header in coerce_method_names:
-            if coerce_method_names[header] in sections:
-                return sections[coerce_method_names[header]].strip()
-        return sections[''].strip()
-
     def get_path_fields(self, path, method):
         """
         Return a list of `coreapi.Field` instances corresponding to any
diff --git a/rest_framework/schemas/inspectors.py b/rest_framework/schemas/inspectors.py
index 86fcdc435..3b7e7f963 100644
--- a/rest_framework/schemas/inspectors.py
+++ b/rest_framework/schemas/inspectors.py
@@ -3,9 +3,13 @@ inspectors.py   # Per-endpoint view introspection
 
 See schemas.__init__.py for package overview.
 """
+import re
 from weakref import WeakKeyDictionary
 
+from django.utils.encoding import smart_text
+
 from rest_framework.settings import api_settings
+from rest_framework.utils import formatting
 
 
 class ViewInspector:
@@ -15,6 +19,9 @@ class ViewInspector:
     Provide subclass for per-view schema generation
     """
 
+    # Used in _get_description_section()
+    header_regex = re.compile('^[a-zA-Z][0-9A-Za-z_]*:')
+
     def __init__(self):
         self.instance_schemas = WeakKeyDictionary()
 
@@ -62,6 +69,45 @@ class ViewInspector:
     def view(self):
         self._view = None
 
+    def get_description(self, path, method):
+        """
+        Determine a path description.
+
+        This will be based on the method docstring if one exists,
+        or else the class docstring.
+        """
+        view = self.view
+
+        method_name = getattr(view, 'action', method.lower())
+        method_docstring = getattr(view, method_name, None).__doc__
+        if method_docstring:
+            # An explicit docstring on the method or action.
+            return self._get_description_section(view, method.lower(), formatting.dedent(smart_text(method_docstring)))
+        else:
+            return self._get_description_section(view, getattr(view, 'action', method.lower()),
+                                                 view.get_view_description())
+
+    def _get_description_section(self, view, header, description):
+        lines = [line for line in description.splitlines()]
+        current_section = ''
+        sections = {'': ''}
+
+        for line in lines:
+            if self.header_regex.match(line):
+                current_section, separator, lead = line.partition(':')
+                sections[current_section] = lead.strip()
+            else:
+                sections[current_section] += '\n' + line
+
+        # TODO: SCHEMA_COERCE_METHOD_NAMES appears here and in `SchemaGenerator.get_keys`
+        coerce_method_names = api_settings.SCHEMA_COERCE_METHOD_NAMES
+        if header in sections:
+            return sections[header].strip()
+        if header in coerce_method_names:
+            if coerce_method_names[header] in sections:
+                return sections[coerce_method_names[header]].strip()
+        return sections[''].strip()
+
 
 class DefaultSchema(ViewInspector):
     """Allows overriding AutoSchema using DEFAULT_SCHEMA_CLASS setting"""
diff --git a/rest_framework/schemas/openapi.py b/rest_framework/schemas/openapi.py
index 0d45e27cf..e33759e81 100644
--- a/rest_framework/schemas/openapi.py
+++ b/rest_framework/schemas/openapi.py
@@ -17,8 +17,6 @@ from .generators import BaseSchemaGenerator
 from .inspectors import ViewInspector
 from .utils import get_pk_description, is_list_view
 
-# Generator
-
 
 class SchemaGenerator(BaseSchemaGenerator):
 
@@ -94,6 +92,7 @@ class AutoSchema(ViewInspector):
         operation = {}
 
         operation['operationId'] = self._get_operation_id(path, method)
+        operation['description'] = self.get_description(path, method)
 
         parameters = []
         parameters += self._get_path_parameters(path, method)
diff --git a/tests/schemas/test_openapi.py b/tests/schemas/test_openapi.py
index fc22c32ab..5a56bae87 100644
--- a/tests/schemas/test_openapi.py
+++ b/tests/schemas/test_openapi.py
@@ -77,7 +77,7 @@ class TestOperationIntrospection(TestCase):
         method = 'GET'
 
         view = create_view(
-            views.ExampleListView,
+            views.DocStringExampleListView,
             method,
             create_request(path)
         )
@@ -86,7 +86,8 @@ class TestOperationIntrospection(TestCase):
 
         operation = inspector.get_operation(path, method)
         assert operation == {
-            'operationId': 'listExamples',
+            'operationId': 'listDocStringExamples',
+            'description': 'A description of my GET operation.',
             'parameters': [],
             'responses': {
                 '200': {
@@ -108,23 +109,38 @@ class TestOperationIntrospection(TestCase):
         method = 'GET'
 
         view = create_view(
-            views.ExampleDetailView,
+            views.DocStringExampleDetailView,
             method,
             create_request(path)
         )
         inspector = AutoSchema()
         inspector.view = view
 
-        parameters = inspector._get_path_parameters(path, method)
-        assert parameters == [{
-            'description': '',
-            'in': 'path',
-            'name': 'id',
-            'required': True,
-            'schema': {
-                'type': 'string',
+        operation = inspector.get_operation(path, method)
+        assert operation == {
+            'operationId': 'RetrieveDocStringExampleDetail',
+            'description': 'A description of my GET operation.',
+            'parameters': [{
+                'description': '',
+                'in': 'path',
+                'name': 'id',
+                'required': True,
+                'schema': {
+                    'type': 'string',
+                },
+            }],
+            'responses': {
+                '200': {
+                    'description': '',
+                    'content': {
+                        'application/json': {
+                            'schema': {
+                            },
+                        },
+                    },
+                },
             },
-        }]
+        }
 
     def test_request_body(self):
         path = '/'
diff --git a/tests/schemas/views.py b/tests/schemas/views.py
index 6b83e5bde..f8d143e71 100644
--- a/tests/schemas/views.py
+++ b/tests/schemas/views.py
@@ -29,6 +29,30 @@ class ExampleDetailView(APIView):
         pass
 
 
+class DocStringExampleListView(APIView):
+    """
+    get: A description of my GET operation.
+    post: A description of my POST operation.
+    """
+    permission_classes = [permissions.IsAuthenticatedOrReadOnly]
+
+    def get(self, *args, **kwargs):
+        pass
+
+    def post(self, request, *args, **kwargs):
+        pass
+
+
+class DocStringExampleDetailView(APIView):
+    permission_classes = [permissions.IsAuthenticatedOrReadOnly]
+
+    def get(self, *args, **kwargs):
+        """
+        A description of my GET operation.
+        """
+        pass
+
+
 # Generics.
 class ExampleSerializer(serializers.Serializer):
     date = serializers.DateField()

From 0d3d548aa52c92c57bb919c2965b723aee6b903f Mon Sep 17 00:00:00 2001
From: Yann Savary <ysavary@users.noreply.github.com>
Date: Wed, 6 Nov 2019 21:54:12 +0100
Subject: [PATCH 6/6] OpenAPI: Fixed generation when title or version not
 provided. (#6912)

---
 docs/api-guide/schemas.md            |  2 +-
 rest_framework/schemas/generators.py |  2 +-
 rest_framework/schemas/openapi.py    |  5 +++--
 tests/schemas/test_openapi.py        | 13 +++++++++++++
 4 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/docs/api-guide/schemas.md b/docs/api-guide/schemas.md
index ec5366d8e..e33a2a611 100644
--- a/docs/api-guide/schemas.md
+++ b/docs/api-guide/schemas.md
@@ -73,7 +73,7 @@ The `get_schema_view()` helper takes the following keyword arguments:
 
 * `title`: May be used to provide a descriptive title for the schema definition.
 * `description`: Longer descriptive text.
-* `version`: The version of the API. Defaults to `0.1.0`.
+* `version`: The version of the API.
 * `url`: May be used to pass a canonical base URL for the schema.
 
         schema_view = get_schema_view(
diff --git a/rest_framework/schemas/generators.py b/rest_framework/schemas/generators.py
index 77e92eeb8..4b6d82a14 100644
--- a/rest_framework/schemas/generators.py
+++ b/rest_framework/schemas/generators.py
@@ -151,7 +151,7 @@ class BaseSchemaGenerator(object):
     # Set by 'SCHEMA_COERCE_PATH_PK'.
     coerce_path_pk = None
 
-    def __init__(self, title=None, url=None, description=None, patterns=None, urlconf=None, version=''):
+    def __init__(self, title=None, url=None, description=None, patterns=None, urlconf=None, version=None):
         if url and not url.endswith('/'):
             url += '/'
 
diff --git a/rest_framework/schemas/openapi.py b/rest_framework/schemas/openapi.py
index e33759e81..134df5043 100644
--- a/rest_framework/schemas/openapi.py
+++ b/rest_framework/schemas/openapi.py
@@ -21,9 +21,10 @@ from .utils import get_pk_description, is_list_view
 class SchemaGenerator(BaseSchemaGenerator):
 
     def get_info(self):
+        # Title and version are required by openapi specification 3.x
         info = {
-            'title': self.title,
-            'version': self.version,
+            'title': self.title or '',
+            'version': self.version or ''
         }
 
         if self.description is not None:
diff --git a/tests/schemas/test_openapi.py b/tests/schemas/test_openapi.py
index 5a56bae87..622f78cdd 100644
--- a/tests/schemas/test_openapi.py
+++ b/tests/schemas/test_openapi.py
@@ -704,3 +704,16 @@ class TestGenerator(TestCase):
         assert schema['info']['title'] == 'My title'
         assert schema['info']['version'] == '1.2.3'
         assert schema['info']['description'] == 'My description'
+
+    def test_schema_information_empty(self):
+        """Construction of the top level dictionary."""
+        patterns = [
+            url(r'^example/?$', views.ExampleListView.as_view()),
+        ]
+        generator = SchemaGenerator(patterns=patterns)
+
+        request = create_request('/')
+        schema = generator.get_schema(request=request)
+
+        assert schema['info']['title'] == ''
+        assert schema['info']['version'] == ''