Added 'get_schema_view()' shortcut

docs/api-guide/schemas.md

@@ -102,15 +102,20 @@ REST framework includes functionality for auto-generating a schema,
 or allows you to specify one explicitly. There are a few different ways to
 add a schema to your API, depending on exactly what you need.
 
-## Using DefaultRouter
+## The get_schema_view shortcut
 
-If you're using `DefaultRouter` then you can include an auto-generated schema,
-simply by adding a `schema_title` argument to the router.
+The simplest way to include a schema in your project is to use the
+`get_schema_view()` function.
 
-    router = DefaultRouter(schema_title='Server Monitoring API')
+    schema_view = get_schema_view(title="Server Monitoring API")
 
-The schema will be included at the root URL, `/`, and presented to clients
-that include the Core JSON media type in their `Accept` header.
+    urlpatterns = [
+        url('^$', schema_view),
+        ...
+    ]
+
+Once the view has been added, you'll be able to make API requests to retrieve
+the auto-generated schema definition.
 
     $ http http://127.0.0.1:8000/ Accept:application/vnd.coreapi+json
     HTTP/1.0 200 OK
@@ -125,48 +130,43 @@ that include the Core JSON media type in their `Accept` header.
         ...
     }
 
-This is a great zero-configuration option for when you want to get up and
-running really quickly.
+The arguments to `get_schema_view()` are:
 
-The other available options to `DefaultRouter` are:
+#### `title`
 
-#### schema_renderers
+May be used to provide a descriptive title for the schema definition.
 
-May be used to pass the set of renderer classes that can be used to render schema output.
+#### `url`
+
+May be used to pass a canonical URL for the schema.
+
+    schema_view = get_schema_view(
+        title='Server Monitoring API',
+        url='https://www.example.org/api/'
+    )
+
+#### `renderer_classes`
+
+May be used to pass the set of renderer classes that can be used to render the API root endpoint.
 
     from rest_framework.renderers import CoreJSONRenderer
     from my_custom_package import APIBlueprintRenderer
 
-    router = DefaultRouter(schema_title='Server Monitoring API', schema_renderers=[
-        CoreJSONRenderer, APIBlueprintRenderer
-    ])
-
-#### schema_url
-
-May be used to pass the root URL for the schema. This can either be used to ensure that
-the schema URLs include a canonical hostname and schema, or to ensure that all the
-schema URLs include a path prefix.
-
-    router = DefaultRouter(
-        schema_title='Server Monitoring API',
-        schema_url='https://www.example.org/api/'
+    schema_view = get_schema_view(
+        title='Server Monitoring API',
+        url='https://www.example.org/api/',
+        renderer_classes=[CoreJSONRenderer, APIBlueprintRenderer]
     )
 
-If you want more flexibility over the schema output then you'll need to consider
-using `SchemaGenerator` instead.
+## Using an explicit schema view
 
-#### root_renderers
-
-May be used to pass the set of renderer classes that can be used to render the API root endpoint.
-
-## Using SchemaGenerator
-
-The most common way to add a schema to your API is to use the `SchemaGenerator`
-class to auto-generate the `Document` instance, and to return that from a view.
+If you need a little more control than the `get_schema_view()` shortcut gives you,
+then you can use the `SchemaGenerator` class directly to auto-generate the
+`Document` instance, and to return that from a view.
 
 This option gives you the flexibility of setting up the schema endpoint
-with whatever behavior you want. For example, you can apply different
-permission, throttling or authentication policies to the schema endpoint.
+with whatever behaviour you want. For example, you can apply different
+permission, throttling, or authentication policies to the schema endpoint.
 
 Here's an example of using `SchemaGenerator` together with a view to
 return the schema.
@@ -176,12 +176,13 @@ return the schema.
     from rest_framework.decorators import api_view, renderer_classes
     from rest_framework import renderers, response, schemas
 
+    generator = schemas.SchemaGenerator(title='Bookings API')
 
     @api_view()
     @renderer_classes([renderers.CoreJSONRenderer])
     def schema_view(request):
-        generator = schemas.SchemaGenerator(title='Bookings API')
-        return response.Response(generator.get_schema())
+        schema = generator.get_schema(request)
+        return response.Response(schema)
 
 **urls.py:**
 

docs/tutorial/7-schemas-and-client-libraries.md

@@ -33,10 +33,17 @@ API schema.
 
     $ pip install coreapi
 
-We can now include a schema for our API, by adding a `schema_title` argument to
-the router instantiation.
+We can now include a schema for our API, by including an autogenerated schema
+view in our URL configuration.
 
-    router = DefaultRouter(schema_title='Pastebin API')
+    from rest_framework.schemas import get_schema_view
+
+    schema_view = get_schema_view(title='Pastebin API')
+
+    urlpatterns = [
+        url('^schema/$', schema_view),
+        ...
+    ]
 
 If you visit the API root endpoint in a browser you should now see `corejson`
 representation become available as an option.
@@ -46,7 +53,7 @@ representation become available as an option.
 We can also request the schema from the command line, by specifying the desired
 content type in the `Accept` header.
 
-    $ http http://127.0.0.1:8000/ Accept:application/vnd.coreapi+json
+    $ http http://127.0.0.1:8000/schema/ Accept:application/vnd.coreapi+json
     HTTP/1.0 200 OK
     Allow: GET, HEAD, OPTIONS
     Content-Type: application/vnd.coreapi+json
@@ -91,8 +98,8 @@ Now check that it is available on the command line...
 
 First we'll load the API schema using the command line client.
 
-    $ coreapi get http://127.0.0.1:8000/
-    <Pastebin API "http://127.0.0.1:8000/">
+    $ coreapi get http://127.0.0.1:8000/schema/
+    <Pastebin API "http://127.0.0.1:8000/schema/">
         snippets: {
             highlight(pk)
             list()
@@ -150,7 +157,7 @@ Now if we fetch the schema again, we should be able to see the full
 set of available interactions.
 
     $ coreapi reload
-    Pastebin API "http://127.0.0.1:8000/">
+    Pastebin API "http://127.0.0.1:8000/schema/">
         snippets: {
             create(code, [title], [linenos], [language], [style])
             destroy(pk)

rest_framework/schemas.py

@@ -6,11 +6,13 @@ from django.contrib.admindocs.views import simplify_regex
 from django.utils import six
 from django.utils.encoding import force_text
 
-from rest_framework import exceptions, serializers
+from rest_framework import exceptions, renderers, serializers
 from rest_framework.compat import (
     RegexURLPattern, RegexURLResolver, coreapi, uritemplate, urlparse
 )
 from rest_framework.request import clone_request
+from rest_framework.response import Response
+from rest_framework.settings import api_settings
 from rest_framework.views import APIView
 
 
@@ -92,9 +94,8 @@ class EndpointInspector(object):
         if patterns is None:
             if urlconf is None:
                 # Use the default Django URL conf
-                urls = import_module(settings.ROOT_URLCONF)
-                patterns = urls.urlpatterns
-            else:
+                urlconf = settings.ROOT_URLCONF
+
             # Load the given URLconf module
             if isinstance(urlconf, six.string_types):
                 urls = import_module(urlconf)
@@ -189,7 +190,8 @@ class SchemaGenerator(object):
         if url and not url.endswith('/'):
             url += '/'
 
-        self.endpoint_inspector = self.endpoint_inspector_cls(patterns, urlconf)
+        self.patterns = patterns
+        self.urlconf = urlconf
         self.title = title
         self.url = url
         self.endpoints = None
@@ -199,7 +201,8 @@ class SchemaGenerator(object):
         Generate a `coreapi.Document` representing the API schema.
         """
         if self.endpoints is None:
-            self.endpoints = self.endpoint_inspector.get_api_endpoints()
+            inspector = self.endpoint_inspector_cls(self.patterns, self.urlconf)
+            self.endpoints = inspector.get_api_endpoints()
 
         links = self.get_links(request)
         if not links:
@@ -425,3 +428,30 @@ class SchemaGenerator(object):
 
         # Default action, eg "/users/", "/users/{pk}/"
         return named_path_components + [action]
+
+
+def get_schema_view(title=None, url=None, renderer_classes=None):
+    """
+    Return a schema view.
+    """
+    generator = SchemaGenerator(title=title, url=url)
+    if renderer_classes is None:
+        if renderers.BrowsableAPIRenderer in api_settings.DEFAULT_RENDERER_CLASSES:
+            rclasses = [renderers.CoreJSONRenderer, renderers.BrowsableAPIRenderer]
+        else:
+            rclasses = [renderers.CoreJSONRenderer]
+    else:
+        rclasses = renderer_classes
+
+    class SchemaView(APIView):
+        _ignore_model_permissions = True
+        exclude_from_schema = True
+        renderer_classes = rclasses
+
+        def get(self, request, *args, **kwargs):
+            schema = generator.get_schema(request)
+            if schema is None:
+                raise exceptions.PermissionDenied()
+            return Response(schema)
+
+    return SchemaView.as_view()