ios - 将键和值添加到 Firebase 中 JSON 树中的所有子节点

Question

我想将键和值添加到 Firebase 中的所有子项 ("rate":0)。

这是我的 JSON 树。我如何能够遍历 JSON 树并将 "rate":0 设置为所有这些:

我尝试用 Pyrebase 来做，但很痛苦。

Answer 1

尝试:-

  FIRDatabase.database().reference().child("Snuses").observeSingleEvent(of: .value, with: {(toBeAppendedSnap) in


        if let snapDict = toBeAppendedSnap.value as? [String:AnyObject]{

            for each in snapDict{

                let eachKey = each.key

                if let eachValue = each.value as? NSMutableDictionary{

                     eachValue.setObject("0", forKey: "rate" as NSCopying)
                     FIRDatabase.database().reference().child("Snuses/\(eachKey)").setValue(eachValue, withCompletionBlock: { (err, ref) in
                        print("Updated")
                     })
                }
            }
        }
    })

或者:-

    FIRDatabase.database().reference().child("Snuses").observeSingleEvent(of: .value, with: {(toBeAppendedSnap) in


        if let snapDict = toBeAppendedSnap.value as? [String:AnyObject]{

            for each in snapDict{

                FIRDatabase.database().reference().child("Snuses/\(each.key)").updateChildValues(["rate" : "0"])

            }
        }
    })