Question

当我执行仅请求指针的某些选定字段的查询时，收到的响应不包括指针类型和类名。

示例：

PFQuery * query = [PFQuery queryWithClassName:@"ClassA"];
[query includeKey:@"column1"]; // This is a pointer with classname : ClassB
[query selectKeys:@[@"column1.subColumn1",@"column1.subColumn2"]];

结果是

"column1": {
        "createdAt": "2015-10-29T19:46:17.167Z",
        "subColumn1": "Some Value1",
        "subColumn2": "Some Value2",
        "objectId": "iCK9CpgKAh",
        "updatedAt": "2015-11-16T14:30:11.312Z"
      },

但是，如果我不只是选择一些字段，并包含所有子列字段，它将起作用：

PFQuery * query = [PFQuery queryWithClassName:@"ClassA"];
[query includeKey:@"column1"]; // This will select all fields inside column1

结果：

"column1": {
        "__type": "Pointer",
        "className": "ClassB",
        "createdAt": "2015-10-29T19:46:17.167Z",
        "subColumn1": "Some Value1",
        "subColumn2": "Some Value2",
        "subColumn3": "Some Value3",
        "objectId": "iCK9CpgKAh",
        "updatedAt": "2015-11-16T14:30:11.312Z"
      },

当我们使用PFSubclassing时会产生问题，因为指针列不被视为指针，而是被视为NSDictionary。

例如：

PFClassA和PFClassB是解析子类。

@interface PFClassB : PFObject<PFSubclassing>
@property (copy) NSString * subColumn1;
@property (copy) NSString * subColumn2;
@property (copy) NSString * subColumn2;
@end

@interface PFClassA : PFObject<PFSubclassing>
@property (strong) PFClassB * column1;
@end

当我们执行查询时，只需选择PFClassB的2个字段，如上面的查询， column1的结果将是字典，而不是PFClassB。

有解决方法吗？

感谢。

嵌套选择查询缺少指针和className - Parse.com

0 个答案: