Node asset amount (#2192)

* [Bugfix] 修复错误

* [Update] 优化用户api

apps/users/models/user.py

@@ -142,6 +142,18 @@ class User(AbstractUser):
             return True
         return False
 
+    @property
+    def groups_display(self):
+        return ' '.join(self.groups.all().values_list('name', flat=True))
+
+    @property
+    def role_display(self):
+        return self.get_role_display()
+
+    @property
+    def source_display(self):
+        return self.get_source_display()
+
     @property
     def is_expired(self):
         if self.date_expired and self.date_expired < timezone.now():