diff --git a/access/urls.py b/access/urls.py
index d13a251..39dafea 100644
--- a/access/urls.py
+++ b/access/urls.py
@@ -3,7 +3,7 @@ from access import views
 
 urlpatterns = [
     url(r'teachers/$', views.TeacherListView.as_view()),
-    url(r'info/$', views.InfoUserView.as_view()),
+    url(r'detail/$', views.DetailUserView.as_view()),
     url(r'detail/([0-9]{1,99})/$', views.DetailUserView.as_view()),
     url(r'guard/(?P<pk>[0-9]{1,99})/(?P<page>.+)/$', views.UserGuardView.as_view()),
     url(r'find/$', views.FindUserView.as_view()),
diff --git a/access/views.py b/access/views.py
index beee77e..6c33ce1 100644
--- a/access/views.py
+++ b/access/views.py
@@ -31,16 +31,6 @@ class CheckUserView(APIView):
         return Response(False, status=self.status_code)
 
 
-class InfoUserView(APIView):
-    renderer_classes = (JSONRenderer,)
-    status_code = 200
-
-    def get(self, request):
-        if request.user.is_authenticated():
-            return Response(UserSelfSerializer(request.user).data, status=self.status_code)
-        return Response('anonymous', status=self.status_code)
-
-
 class FindUserView(APIView):
     renderer_classes = (JSONRenderer,)
     status_code = 200
@@ -77,8 +67,16 @@ class DetailUserView(APIView):
     permission_classes = (IsAuthenticated,)
 
     @staticmethod
-    def get(request, pk):
-        if request.user.is_superuser or request.user.is_staff or request.user.id == int(pk):
+    def get(request, pk=None):
+        if pk is None:
+            if request.user.is_authenticated():
+                serialized_user = UserSelfSerializer(request.user).data
+                serialized_user['is_i'] = True
+                return Response(serialized_user, status=200)
+            return Response('anonymous', status=200)
+
+        if request.user.is_authenticated() and request.user.is_superuser \
+                or request.user.is_staff or request.user.id == int(pk):
 
             try:
                 user = get_user_model().objects.get(id=pk)
diff --git a/courses/views.py b/courses/views.py
index 25a1e8c..db85ea3 100644
--- a/courses/views.py
+++ b/courses/views.py
@@ -86,7 +86,9 @@ class VertexDetail(APIView):
         progress = vertex.course.progress_set.filter(user=request.user)
         try:
             if progress.exists():
-                res['next'] = MiniVertexSerializer(vertex.get_next(progress[0].get_template())).data
+                next_vertex = vertex.get_next(progress[0].get_template())
+                if next_vertex:
+                    res['next'] = MiniVertexSerializer(next_vertex).data
                 res['is_in_progress'] = vertex in progress[0].get_objects_in_progress()
             else:
                 res['next'] = MiniVertexSerializer(vertex.get_next(vertex.course.route)).data
diff --git a/maps/models.py b/maps/models.py
index 1d2ed60..6a90a4e 100644
--- a/maps/models.py
+++ b/maps/models.py
@@ -43,7 +43,8 @@ class CourseMap(models.Model):
 
     def get_next(self, vertex):
         pivot = self.pivotvertex_set.get(vertex=vertex)
-        return self.pivotvertex_set.filter(sort__gt=pivot.sort).exclude(vertex__content_type__model='topic').first().vertex
+        pivots = self.pivotvertex_set.filter(sort__gt=pivot.sort).exclude(vertex__content_type__model='topic')
+        return pivots.first().vertex if pivots.exists() else None
 
     @transaction_decorator
     def add_vertex(self, vertex, sort):