删除problem中多余的代码

oj/urls.py

@@ -13,7 +13,7 @@ from group.views import (GroupAdminAPIView, GroupMemberAdminAPIView,
 
 from admin.views import AdminTemplateView
 
-from problem.views import TestCaseUploadAPIView, ProblemAdminAPIView
+from problem.views import TestCaseUploadAPIView, ProblemTagAdminAPIView, ProblemAdminAPIView
 from submission.views import SubmissionAPIView
 
 urlpatterns = [
@@ -49,6 +49,7 @@ urlpatterns = [
     url(r'^api/admin/group_join/$', JoinGroupAPIView.as_view(), name="group_join_admin_api"),
     url(r'^api/admin/problem/$', ProblemAdminAPIView.as_view(), name="problem_admin_api"),
     url(r'^api/admin/test_case_upload/$', TestCaseUploadAPIView.as_view(), name="test_case_upload_api"),
+    url(r'^api/admin/tag/$', ProblemTagAdminAPIView.as_view(), name="problem_tag_admin_api"),
     url(r'^problem/(?P<problem_id>\d+)/my_submissions/$', "submission.views.problem_my_submissions_list_page",
         name="problem_my_submissions_page"),
     url(r'^my_submission/(?P<submission_id>\w+)/$', "submission.views.my_submission", name="my_submission_page"),

problem/tests.py

@@ -39,6 +39,7 @@ class ProblemPageTest(TestCase):
         self.assertTemplateUsed(response, "utils/error.html")
 
 
+
 class ProblemAdminTest(APITestCase):
     def _create_data(self, problem_id, visible, tags):
         data = {"id": problem_id,
@@ -147,3 +148,19 @@ class ProblemAdminTest(APITestCase):
         data = {"problem_id": 1}
         response = self.client.get(self.url, data=data)
         self.assertEqual(response.data["code"], 0)
+
+
+class ProblemTagAdminAPITest(APITestCase):
+    def setUp(self):
+        self.client = APIClient()
+        self.url = reverse('problem_tag_admin_api')
+        self.user = User.objects.create(username="testx", admin_type=SUPER_ADMIN)
+        self.user.set_password("testxx")
+        self.user.save()
+        self.client.login(username="testx", password="testxx")
+        ProblemTag.objects.create(name="tag1")
+
+    # 以下是返回所有的问题的标签
+    def test_get_all_problem_tag_successfully(self):
+        self.assertEqual(self.client.get(self.url).data["code"], 0)
+

problem/views.py

@@ -28,6 +28,11 @@ def problem_page(request, problem_id):
     return render(request, "oj/problem/problem.html", {"problem": problem, "samples": json.loads(problem.samples)})
 
 
+class ProblemTagAdminAPIView(APIView):
+    def get(self, request):
+        return success_response(ProblemTagSerializer(ProblemTag.objects.all(), many=True).data)
+
+
 class ProblemAdminAPIView(APIView):
     def post(self, request):
         """