Question

我有一个解析对象，我保存到LDS，我想通过1个密钥和另一个密钥下的条目来搜索它。

关键：这很好。

checkQuery.whereKeyExists("File-rZVgZNpNuB")

包含的密钥：这不起作用。

checkQuery.whereKey("seachKey", contains: "myItem0000000000")

控制台正在打印：

 -[__NSArrayM length]: unrecognized selector sent to instance 0x7c09bbb0

我猜是因为mySearchString是“searchKey”字段中的一个对象，它返回一个NSMutable数组。一旦我有了对象，它很容易从数组中获取数据但我需要在“searchKey”字段中搜索该字符串以找到该对象。由于各种原因，我不能只使用“myItem0000000000”键保存对象。也许我可以在保存对象时将其添加为第三个键，但这看起来有点乱。

就在那里，如果我通过SQL Lite查看对象，我可以看到它。

{"className":"downloadedAudio","__complete":true,"__operations":[{"ACL":{"*":{"read":true},"rZVgZNpNuB":{"write":true,"read":true}},"File-rZVgZNpNuB":{"__op":"Add","objects":[{"url":"https:\/\/parse-server-nextbreath-s3-bucket.s3.amazonaws.com\/b5d2110dce0b50dc3a1c620731fad66e_The%20Name%20of%20the%20Wind%2024-92.mp3","name":"b5d2110dce0b50dc3a1c620731fad66e_The Name of the Wind 24-92.mp3","__type":"File"}]},"__uuid":"77AE38AF-1ADB-4795-9BB0-5A5AB7205E28","__updatedAt":{"iso":"2017-03-03T21:28:19.637Z","__type":"Date"},"searchKey":{"__op":"Add","objects":["myItem0000000000"]}}],"isDeletingEventually":0}

----编辑---- 搜索：

        let searchKey = "File-\(PFUser.current()!.objectId!)"
        let checkQuery = PFQuery(className: "downloadedAudio")
        checkQuery.whereKeyExists(searchKey)
        //checkQuery.whereKeyExists(item.name)
        //checkQuery.whereKey("seachKey", contains: item.name)
        checkQuery.fromLocalDatastore()
        checkQuery.getFirstObjectInBackground(block: { (object, error) in
            if object != nil {
                // object?.unpinInBackground()
                object?.unpinInBackground(block: { (success, error) in
                    if success {

保存：

let query = PFQuery(className: "Part")
query.whereKey("objectId", equalTo: selectedObjectId)
query.getFirstObjectInBackground { (object, error) in
    if error != nil || object == nil {
       // ---- 
    } else {

        let searchKey = "File-\(PFUser.current()!.objectId!)"
        downloadedAudio.add(object?.object(forKey: "partAudio") as! PFFile, forKey: file)
        downloadedAudio.add(object?.object(forKey: "partName") as! String, forKey: searchKey)
        let downloadedFile = object?.object(forKey: "partAudio") as! PFFile
        downloadedFile.getDataInBackground({ (data, error) in

Answer 1

我相信您收到了该错误，因为"File-rZVgZNpNuB"是无效密钥。请记住，密钥只能以小写字母开头。

Swift - 解析查询whereKey包含

1 个答案: