Serializing course contents

e-learning/educa/courses/api/permissions.py

@@ -1,7 +1,7 @@
 from rest_framework.permissions import BasePermission
 
 
-class isEnrolled(BasePermission):
+class IsEnrolled(BasePermission):
 
     def has_object_permission(self, request, view, obj):
         return obj.students.filter(id=request.user.id).exists()

e-learning/educa/courses/api/serializers.py

@@ -1,6 +1,6 @@
 from rest_framework import serializers
 
-from ..models import Course, Module, Subject
+from ..models import Content, Course, Module, Subject
 
 
 class SubjectSerializer(serializers.ModelSerializer):
@@ -24,3 +24,34 @@ class Meta:
         model = Course
         fields = ['id', 'subject', 'title', 'slug',
                   'overview', 'created', 'owner', 'modules']
+
+
+class ItemRelatedField(serializers.RelatedField):
+
+    def to_representation(self, value):
+        return value.render()
+
+
+class ContentSerializer(serializers.ModelSerializer):
+    item = ItemRelatedField(read_only=True)
+
+    class Meta:
+        model = Content
+        fields = ['order', 'item']
+
+
+class ModuleWithContentsSerializer(serializers.ModelSerializer):
+    contents = ContentSerializer(many=True)
+
+    class Meta:
+        model = Module
+        fields = ('order', 'title', 'description', 'contents')
+
+
+class CourseWithContentsSerializer(serializers.ModelSerializer):
+    modules = ModuleWithContentsSerializer(many=True)
+
+    class Meta:
+        model = Course
+        fields = ('id', 'subject', 'title', 'slug',
+                  'overview', 'created', 'owner', 'modules')

e-learning/educa/courses/api/views.py

@@ -7,7 +7,9 @@
 from rest_framework.views import APIView
 
 from ..models import Course, Subject
-from .serializers import CourseSerializer, SubjectSerializer
+from .permissions import IsEnrolled
+from .serializers import (CourseSerializer, CourseWithContentsSerializer,
+                          SubjectSerializer)
 
 
 class SubjectListView(generics.ListAPIView):
@@ -41,3 +43,10 @@ def enroll(self, request, pk, format=None):
         course = self.get_object()
         course.students.add(request.user)
         return Response({'enrolled': True})
+
+    @detail_route(methods=['get'],
+    serializer_class=CourseWithContentsSerializer,
+    authentication_classes=[BasicAuthentication],
+    permission_classes=[IsAuthenticated,IsEnrolled])
+    def content(self, request, *args, **kwargs):
+        return self.retrieve(request, *args, **kwargs)