Add a GET API endpoint for program enrollments.

openedx/core/lib/api/view_utils.py

@@ -15,6 +15,7 @@ from rest_framework.mixins import RetrieveModelMixin, UpdateModelMixin
 from rest_framework.permissions import IsAuthenticated
 from rest_framework.request import clone_request
 from rest_framework.response import Response
+from rest_framework.views import APIView
 from six import text_type, iteritems
 
 from openedx.core.lib.api.authentication import OAuth2AuthenticationAllowInactiveUser
@@ -304,3 +305,36 @@ class LazySequence(Sequence):
                 self.iterable,
                 self.est_len,
             )
+
+
+class PaginatedAPIView(APIView):
+    """
+    An `APIView` class enhanced with the pagination methods of `GenericAPIView`.
+    """
+    # pylint: disable=attribute-defined-outside-init
+    @property
+    def paginator(self):
+        """
+        The paginator instance associated with the view, or `None`.
+        """
+        if not hasattr(self, '_paginator'):
+            if self.pagination_class is None:
+                self._paginator = None
+            else:
+                self._paginator = self.pagination_class()
+        return self._paginator
+
+    def paginate_queryset(self, queryset):
+        """
+        Return a single page of results, or `None` if pagination is disabled.
+        """
+        if self.paginator is None:
+            return None
+        return self.paginator.paginate_queryset(queryset, self.request, view=self)
+
+    def get_paginated_response(self, data):
+        """
+        Return a paginated style `Response` object for the given output data.
+        """
+        assert self.paginator is not None
+        return self.paginator.get_paginated_response(data)