ft(upgrade):pagination support for articles

- add function in list all views to paginate articles
- import paginator from django framework

[DELIVERS #160617682]

ft(maintain):add a defaults pagination class to settings

authors/apps/articles/views.py

@@ -7,13 +7,12 @@
 from authors.apps.articles.serializers import ArticleSerializer
 from rest_framework.exceptions import PermissionDenied
 from .models import Article
-from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
 from rest_framework import serializers
 from django.core.exceptions import ObjectDoesNotExist
 
 
 class ArticleAPIView(generics.ListCreateAPIView):
-    """create an article, list all articles """
+    """create an article, list all articles paginated to 5 per page"""
     queryset = Article.objects.all()
     permission_classes = (IsAuthenticatedOrReadOnly,)
     renderer_classes = (ArticleJSONRenderer,)
@@ -28,9 +27,9 @@ def create(self, request, *args, **kwargs):
         return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
 
     def perform_create(self, serializer):
-        serializer.save(author=self.request.user)
+        serializer.save(author=self.request.user)   
+
 
-
 class ArticleAPIDetailsView(generics.RetrieveUpdateDestroyAPIView):
     """retreive, update and delete an article """
     permission_classes = (IsAuthenticatedOrReadOnly,)

authors/settings/defaults.py

@@ -154,6 +154,8 @@
 REST_FRAMEWORK = {
     'EXCEPTION_HANDLER': 'authors.apps.core.exceptions.core_exception_handler',
     'NON_FIELD_ERRORS_KEY': 'error',
+    'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
+    'PAGE_SIZE': 5,
 
     'DEFAULT_AUTHENTICATION_CLASSES': (
         'authors.apps.authentication.backends.JWTAuthentication',