如何将参数传递给GraphQL？我尝试了下面的代码，但得到错误Undefined name 'tenant_id'.\nTry correcting the name to one that is defined, or defining the name.

Gql查询

mixin GqlQuery {
  static String getTenancyListQuery = '''
  query{
   tenancy($tenant_id: String!) {    // error in this line
    id
    invoices{
      id
      }
    }
  }
  ''';
}

回购协议

@override
  Future<List<TenancyListResponse>?> getTenancyList() async {
    try {
      final result = await _client.query(QueryOptions(
          document: gql(GqlQuery.getTenancyListQuery),
          variables: const {"tenant_id": 9, "page": 1}));

      return result.data?['tenancy']
          .map((e) => TenancyListResponse.fromJson(e))
          .cast<TenancyListResponse>()
          .toList();
    } catch (e) {
      debugPrint("Exception $e");
      rethrow;
    }
  }