Question

以前工作的代码现在失败了......

我从我的应用中提取了以下几行以显示问题

PFQuery *query = [PFQuery queryWithClassName:@"EBInspection"];
[query setLimit:1000];
[query whereKey:@"ParentID" equalTo:@"OdP1ZnYHib"];
NSLog(@"Count = %i", [query findObjects].count);

这些行在EBInspection表中找到34个匹配的行，但是有86行，我已使用Parse仪表板确认并设置了查询。我还编写了以下代码来测试所有行，它返回86 !!

PFQuery *query = [PFQuery queryWithClassName:@"EBInspection"];
[query setLimit:1000];
[query setSkip:2000];
int nIns = 0;
for (PFObject *obj in [query findObjects]) {
    if ([obj[@"ParentID"] isEqualToString:@"OdP1ZnYHib"]) nIns += 1;
}
NSLog(@"count= %i",nIns);

确实很奇怪。看起来某种数据损坏会混淆查询。任何建议都非常感谢。

Answer 1

使用countObjectsInBackgroundWithBlock代替findObjects，然后自行计算结果。请尝试以下

目标-C

PFQuery *query = [PFQuery queryWithClassName:@"GameScore"];
[query whereKey:@"playername" equalTo:@"Sean Plott"];
[query countObjectsInBackgroundWithBlock:^(int count, NSError *error) {
  if (!error) {
    // The count request succeeded. Log the count
    NSLog(@"Sean has played %d games", count);
  } else {
    // The request failed
  }
}];

夫特

var query = PFQuery(className:"GameScore")
query.whereKey("playerName", equalTo:"Sean Plott")
query.countObjectsInBackgroundWithBlock {
  (count: Int32, error: NSError?) -> Void in
  if error == nil {
    print("Sean has played \(count) games")
  }
}

有关计数操作的更多信息see my detailed explanation here

解析查询不返回所有行

1 个答案: