Documented how to add DJA to installed apps (#963)

This setting is now needed for browsable api and openapi schema.
There might be more features coming needing this and it is also
common practice to do this for django apps.

Co-authored-by: Alan Crosswell <[email protected]>

Author: sliverc

README.rst

@@ -100,8 +100,7 @@ Generally Python and Django series are supported till the official end of life.
 Installation
 ------------
 
-From PyPI
-^^^^^^^^^
+Install using ``pip``...
 
 ::
 
@@ -112,8 +111,7 @@ From PyPI
     $ pip install djangorestframework-jsonapi['openapi']
 
 
-From Source
-^^^^^^^^^^^
+or from source...
 
 ::
 
@@ -122,6 +120,18 @@ From Source
     $ pip install -e .
 
 
+and add ``rest_framework_json_api`` to your ``INSTALLED_APPS`` setting below ``rest_framework``.
+
+::
+
+    INSTALLED_APPS = [
+        ...
+        'rest_framework',
+        'rest_framework_json_api',
+        ...
+    ]
+
+
 Running the example app
 ^^^^^^^^^^^^^^^^^^^^^^^
 

docs/getting-started.md

@@ -61,19 +61,29 @@ Generally Python and Django series are supported till the official end of life.
 
 ## Installation
 
-From PyPI
+Install using `pip`...
 
     pip install djangorestframework-jsonapi
     # for optional package integrations
     pip install djangorestframework-jsonapi['django-filter']
     pip install djangorestframework-jsonapi['django-polymorphic']
     pip install djangorestframework-jsonapi['openapi']
 
-From Source
+or from source...
 
     git clone https://github.com/django-json-api/django-rest-framework-json-api.git
     cd django-rest-framework-json-api && pip install -e .
 
+
+and add `rest_framework_json_api` to your `INSTALLED_APPS` setting below `rest_framework`.
+
+    INSTALLED_APPS = [
+        ...
+        'rest_framework',
+        'rest_framework_json_api',
+        ...
+    ]
+
 ## Running the example app
 
 	git clone https://github.com/django-json-api/django-rest-framework-json-api.git

docs/usage.md

@@ -998,7 +998,7 @@ The `prefetch_related` case will issue 4 queries, but they will be small and fas
 
 ## Generating an OpenAPI Specification (OAS) 3.0 schema document
 
-DRF >= 3.12 has a [new OAS schema functionality](https://www.django-rest-framework.org/api-guide/schemas/) to generate an
+DRF has a [OAS schema functionality](https://www.django-rest-framework.org/api-guide/schemas/) to generate an
 [OAS 3.0 schema](https://www.openapis.org/) as a YAML or JSON file.
 
 DJA extends DRF's schema support to generate an OAS schema in the JSON:API format.