Added GraphQL backend using Django Graphene

{{cookiecutter.project_slug}}/config/settings/base.py

@@ -85,6 +85,7 @@ THIRD_PARTY_APPS = [
     {%- if cookiecutter.use_celery == 'y' -%}
     "django_celery_beat",
     {%- endif %}
+    "graphene_django",
 ]
 
 LOCAL_APPS = [
@@ -325,5 +326,47 @@ STATICFILES_FINDERS += ["compressor.finders.CompressorFinder"]
 # https://github.com/ottoyiu/django-cors-headers#cors_origin_allow_all
 CORS_ORIGIN_ALLOW_ALL = True
 {%- endif %}
+
+# DJANGO REST FRAMEWORK
+# ------------------------------------------------------------------------------
+# http://www.django-rest-framework.org/
+REST_FRAMEWORK = {
+    "DEFAULT_PERMISSION_CLASSES": (
+        "rest_framework.permissions.IsAuthenticated",
+    ),
+    "DEFAULT_AUTHENTICATION_CLASSES": (
+        "rest_framework.authentication.SessionAuthentication",
+        "rest_framework.authentication.BasicAuthentication",
+        "oauth2_provider.contrib.rest_framework.OAuth2Authentication",
+        "rest_framework_jwt.authentication.JSONWebTokenAuthentication",
+    ),
+    "DEFAULT_RENDERER_CLASSES": (
+        "rest_framework.renderers.JSONRenderer",
+        "rest_framework.renderers.BrowsableAPIRenderer",
+        "rest_framework.renderers.AdminRenderer",
+    ),
+    "DEFAULT_PAGINATION_CLASS": "rest_framework.pagination.LimitOffsetPagination",
+    "PAGE_SIZE": 100,
+    "COERCE_DECIMAL_TO_STRING": False,
+    "DEFAULT_VERSIONING_CLASS": "rest_framework.versioning.URLPathVersioning",
+    # NOTE: See: https://www.django-rest-framework.org/community/3.10-announcement/#continuing-to-use-coreapi
+    "DEFAULT_SCHEMA_CLASS": "rest_framework.schemas.coreapi.AutoSchema",
+}
+
+# Graphene Setup
+# ------------------------------------------------------------------------------
+# See: http://docs.graphene-python.org/projects/django/en/latest/tutorial-plain/#update-settings
+GRAPHENE = {
+    "SCHEMA": "{{ cookiecutter.project_slug }}.graphql.schema.schema",
+    'SCHEMA_OUTPUT': 'frontend/src/apollo/schema.json',
+    'SCHEMA_INDENT': 2,
+    "MIDDLEWARE": [
+        "graphene_django.debug.DjangoDebugMiddleware",
+    ]
+}
+# NOTE: As Graphene schema gets larger, it needs more room to run the recursive graphql queries
+# See: https://github.com/graphql-python/graphene/issues/663
+GRAPHENE_RECURSION_LIMIT = env.int("GRAPHENE_RECURSION_LIMIT", default=3500)
+
 # Your stuff...
 # ------------------------------------------------------------------------------

{{cookiecutter.project_slug}}/config/urls.py

@@ -2,9 +2,12 @@ from django.conf import settings
 from django.urls import include, path, re_path
 from django.conf.urls.static import static
 from django.contrib import admin
+from django.views.decorators.csrf import csrf_exempt
 from django.views.generic import TemplateView
 from django.views import defaults as default_views
 
+from graphene_file_upload.django import FileUploadGraphQLView
+from rest_framework.documentation import include_docs_urls
 from rest_framework.routers import DefaultRouter
 
 
@@ -14,16 +17,22 @@ router = DefaultRouter(trailing_slash=False)
 urlpatterns = [
     path("", TemplateView.as_view(template_name="pages/home.html"), name="home"),
     re_path(r'^app/(?P<route>.*)$', TemplateView.as_view(template_name="index.html"), name='app'),
+
+    # APIs
     path("api/", include(router.urls)),
-    path(
-        "about/", TemplateView.as_view(template_name="pages/about.html"), name="about"
-    ),
-    # Django Admin, use {% raw %}{% url 'admin:index' %}{% endraw %}
-    path(settings.ADMIN_URL, admin.site.urls),
-    # User management
+    path("api-docs/", include_docs_urls(title="{{ cookiecutter.project_name }} REST API", public=False)),
+    path("graphql/", csrf_exempt(FileUploadGraphQLView.as_view(graphiql=True, pretty=True))),
+
+    # User management from django-all-auth
+    path("about/", TemplateView.as_view(template_name="pages/about.html"), name="about"),
     path("users/", include("{{ cookiecutter.project_slug }}.users.urls", namespace="users")),
     path("accounts/", include("allauth.urls")),
+
+    # Django Admin, use {% raw %}{% url 'admin:index' %}{% endraw %}
+    path(settings.ADMIN_URL, admin.site.urls),
+
     # Your stuff: custom urls includes go here
+
 ] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
 
 if settings.DEBUG:

{{cookiecutter.project_slug}}/requirements/base.txt

@@ -29,6 +29,11 @@ django-compressor==2.3  # https://github.com/django-compressor/django-compressor
 {%- endif %}
 django-redis==4.10.0  # https://github.com/niwinz/django-redis
 
+# GraphQL
+graphene-django==2.6.0 # http://docs.graphene-python.org/projects/django/en/latest/
+graphene-django-optimizer==0.6.0  # https://github.com/tfoxy/graphene-django-optimizer
+graphene-file-upload==1.2.2  # https://github.com/lmcgartland/graphene-file-upload
+
 # Django REST Framework
 djangorestframework==3.10.3  # https://github.com/encode/django-rest-framework
 coreapi==2.3.3  # https://github.com/core-api/python-client

{{cookiecutter.project_slug}}/{{cookiecutter.project_slug}}/graphql/conversions.py

@@ -0,0 +1,66 @@
+# -*- coding: utf-8 -*-
+from django.contrib.postgres.fields import ArrayField, JSONField
+from django.db.models import FileField
+from django.forms import Field
+
+from django_filters import Filter
+from graphene import Float, Int, JSONString, List, String
+from graphene_django.converter import convert_django_field
+from graphene_django.forms.converter import convert_form_field
+
+
+# NOTE: This needs to be done before importing from queries
+# SEE: https://github.com/graphql-python/graphene-django/issues/18
+@convert_django_field.register(ArrayField)
+def convert_array_to_list(field, registry=None):
+    return List(of_type=String, description=field.help_text, required=not field.null)
+
+
+@convert_django_field.register(JSONField)
+def convert_jsonb_to_string(field, registry=None):
+    return JSONString(description=field.help_text, required=not field.null)
+
+
+@convert_django_field.register(FileField)
+def convert_file_to_string(field, registry=None):
+    return String(description=field.help_text, required=not field.null)
+
+
+def generate_list_filter_class(inner_type):
+    """
+    Returns a Filter class that will resolve into a List(`inner_type`) graphene
+    type.
+
+    This allows us to do things like use `__in` filters that accept graphene
+    lists instead of a comma delimited value string that's interpolated into
+    a list by django_filters.BaseCSVFilter (which is used to define
+    django_filters.BaseInFilter)
+    """
+
+    form_field = type(
+        "List{}FormField".format(inner_type.__name__),
+        (Field,),
+        {},
+    )
+    filter_class = type(
+        "{}ListFilter".format(inner_type.__name__),
+        (Filter,),
+        {
+            "field_class": form_field,
+            "__doc__": (
+                "{0}ListFilter is a small extension of a raw django_filters.Filter "
+                "that allows us to express graphql List({0}) arguments using FilterSets."
+                "Note that the given values are passed directly into queryset filters."
+            ).format(inner_type.__name__),
+        },
+    )
+    convert_form_field.register(form_field)(
+        lambda x: List(inner_type, required=x.required)
+    )
+
+    return filter_class
+
+
+FloatListFilter = generate_list_filter_class(Float)
+IntListFilter = generate_list_filter_class(Int)
+StringListFilter = generate_list_filter_class(String)

{{cookiecutter.project_slug}}/{{cookiecutter.project_slug}}/graphql/mutation.py

@@ -0,0 +1,7 @@
+# -*- coding: utf-8 -*-
+from graphene import Field, ObjectType
+from graphene_django.debug import DjangoDebug
+
+
+class Mutation(ObjectType):
+    debug = Field(DjangoDebug, name='__debug')

{{cookiecutter.project_slug}}/{{cookiecutter.project_slug}}/graphql/query.py

@@ -0,0 +1,7 @@
+# -*- coding: utf-8 -*-
+from graphene import Field, ObjectType
+from graphene_django.debug import DjangoDebug
+
+
+class Query(ObjectType):
+    debug = Field(DjangoDebug, name='__debug')

{{cookiecutter.project_slug}}/{{cookiecutter.project_slug}}/graphql/schema.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+import sys
+
+from django.conf import settings
+
+from graphene import Schema
+
+# NOTE: Conversions need to happen before importing from queries/mutations
+from . import conversions  # NOQA
+from . import mutation, query
+
+
+# NOTE: As Graphene schema gets larger, it needs more room to run the recursive graphql queries
+# See: https://github.com/graphql-python/graphene/issues/663
+sys.setrecursionlimit(settings.GRAPHENE_RECURSION_LIMIT)
+
+
+schema = Schema(query=query.Query, mutation=mutation.Mutation)