[update] 修改remote apps的serializer

apps/perms/serializers/remote_app_permission.py

@@ -1,6 +1,7 @@
 #  coding: utf-8
 #
 from rest_framework import serializers
+from django.db.models import Count
 
 from common.serializers import AdaptedBulkListSerializer
 from orgs.mixins.serializers import BulkOrgResourceModelSerializer
@@ -25,10 +26,21 @@ class RemoteAppPermissionSerializer(BulkOrgResourceModelSerializer):
         ]
         m2m_fields = [
             'users', 'user_groups', 'remote_apps', 'system_users',
+            'users_amount', 'user_groups_amount', 'remote_apps_amount',
+            'system_users_amount'
         ]
         fields = small_fields + m2m_fields
         read_only_fields = ['created_by', 'date_created']
 
+    @classmethod
+    def setup_eager_loading(cls, queryset):
+        """ Perform necessary eager loading of data. """
+        queryset = queryset.annotate(
+            users_amount=Count('users'), user_groups_amount=Count('user_groups'),
+            remote_apps_amount=Count('remote_apps'),  system_users_amount=Count('system_users')
+        )
+        return queryset
+
 
 class RemoteAppPermissionUpdateUserSerializer(serializers.ModelSerializer):
     class Meta: