diff --git a/apps/courses/views.py b/apps/courses/views.py
index 70ecc3d..9df1e24 100644
--- a/apps/courses/views.py
+++ b/apps/courses/views.py
@@ -73,7 +73,9 @@ def get(self, request, course_id):
         if request.user.is_authenticated():
             if UserFavorite.objects.filter(user=request.user, fav_id=course.id, fav_type=1):
                 has_fav_course = True
-            if UserFavorite.objects.filter(user=request.user, fav_id=course.course_org.id, fav_type=2):
+            if UserFavorite.objects.filter(
+                user=request.user, fav_id=course.course_org_id, fav_type=2
+            ):
                 has_fav_org = True
 
         return render(request, 'course-detail.html', {
diff --git a/apps/organization/views.py b/apps/organization/views.py
index 33c830d..1f29f74 100644
--- a/apps/organization/views.py
+++ b/apps/organization/views.py
@@ -275,7 +275,7 @@ def get(self, request, teacher_id):
             has_teacher_faved = True
 
         has_org_faved = False
-        if UserFavorite.objects.filter(user=request.user, fav_type=2, fav_id=teacher.org.id):
+        if UserFavorite.objects.filter(user=request.user, fav_type=2, fav_id=teacher.org_id):
             has_org_faved = True
 
         return render(request, 'teacher-detail.html', {
diff --git a/apps/users/views.py b/apps/users/views.py
index a6dd5dc..5222431 100644
--- a/apps/users/views.py
+++ b/apps/users/views.py
@@ -94,8 +94,10 @@ def post(self, request):
         register_form = RegisterForm(request.POST)
         if register_form.is_valid():
             email = request.POST.get('email', '')
-            if UserProfile.objects.filter(email=email):
-                return render(request, 'register.html', {'register_form': register_form, 'msg': '用户已经存在！'})
+            if UserProfile.objects.filter(email=email).exists():
+                return render(
+                    request, 'register.html', {'register_form': register_form, 'msg': '用户已经存在！'}
+                )
             password = request.POST.get('password', '')
 
             user_profile = UserProfile()
@@ -122,7 +124,7 @@ class ActiveUserView(View):
     def get(self, request, active_code):
         # 为什么用 filter ？ 因为用户可能注册了好多次，一个 email 对应了好多个 code
         all_records = EmailVerifyRecord.objects.filter(code=active_code)
-        if all_records:
+        if all_records.exists():
             for records in all_records:
                 email = records.email
                 user = UserProfile.objects.get(email=email)
@@ -152,7 +154,7 @@ class ResetView(View):
     def get(self, request, active_code):
         # 如果第二次进来，链接就失效
         all_records = EmailVerifyRecord.objects.filter(code=active_code)
-        if all_records:
+        if all_records.exists():
             for records in all_records:
                 email = records.email
                 return render(request, 'password_reset.html', {'email': email})
@@ -249,7 +251,7 @@ def get(self, request):
         email = request.GET.get('email', '')
 
         res = dict()
-        if UserProfile.objects.filter(email=email):
+        if UserProfile.objects.filter(email=email).exists():
             res['email'] = '邮箱已注册'
             return HttpResponse(json.dumps(res), content_type='application/json')
         send_register_email(email, 'update_email')
@@ -266,7 +268,7 @@ def post(self, request):
 
         existed_records = EmailVerifyRecord.objects.filter(email=email, code=code, send_type='update_email')
         res = dict()
-        if existed_records:
+        if existed_records.exists():
             user = request.user
             user.email = email
             user.save()