关系 - Parse 中的一对多

Question

解析服务器中的数据结构：

对象 - objectId:String, userPointer:Pointer, title:String, image:File, description:String, verified:Bool、comments:Relations（关系，这样当我点击评论时 class 它会加载关联的评论）

评论 - objectId:String, userPointer:Pointer, imagePointer:Pointer, comment:String

我正在尝试将评论保存到评论 class。同时我需要将关系添加到对象 Class ...................目的是当您查询关系时，您会得到与之关联的所有评论。

到目前为止我已经尝试过：

// Create the comment
    let myComment = PFObject(className:"Comments")
    myComment["comment"] = "kgvhgv"


    // Add a relation between the Post and Comment
    myComment["userPointer"] = PFObject(withoutDataWithClassName: "_User", objectId: "nnnnnnnnn")
    myComment["imagePointer"] = PFObject(withoutDataWithClassName: "Objects", objectId: "nnnnnnnnn")

    let query = PFQuery(className:"Objects")
    query.whereKey("objectId", equalTo: "tJP0kskNxQ")
    query.findObjectsInBackground { (objects, error) -> Void in

        if (error == nil) {

            for object in objects! {
                print(object)
                             var relation = object.relation(forKey: "comments")
                relation.add(myComment)

                relation.saveInBackground(block: { (success:Bool, error:Error?) -> Void in
                    if (success) {
                        print("Saved relation")
                        // The post has been added to the user's likes relation.
                    } else {
                        print(error)
                        // There was a problem, check error.description
                    }


                })
             }
        }
   }

    // This will save both myPost and myComment
    myComment.saveInBackground()

}

和

let object = PFObject(withoutDataWithClassName: "Objects", objectId: "nnnnnnnnn")


   var relation = object.relationForKey("comment")
relation.addObject(myComment)
m.saveInBackgroundWithBlock {
  (success: Bool, error: NSError?) -> Void in
  if (success) {
    // The post has been added to the user's likes relation.
  } else {
    // There was a problem, check error.description
  }
}

注释正确地保存了指针，但是关系没有。

我能找到的所有教程都与保存与用户的关系有关，但这不是我想要的。

非常感谢帮助。

Answer 1

.....原来解决方法是把

var relation = object.relationForKey("comment")
relation.addObject(myComment)

在 saveInBackGround 块内！

关系 - Parse 中的一对多

Relations - One to many in Parse

relational-database

parse-platform

swift