Question

我目前正在尝试获取/读取Firebase上数据库中存储的数据。由于某种原因，该请求运行了太多次，我不确定为什么会这样。（即使在我要写入相同数据的20-30个额外插槽的地方，也会发生这种情况）。 有人可以告诉我为什么会这样吗，我该怎么做？ 我的项目基本上是打印出一个Family Tree连接，该连接最终将用于前端。但是我正在处理大量的信息/数据。我目前仅在Javascript上运行此程序（尚无前端连接）。我正在使用webstorm作为IDE编写此代码。以下是我的代码：

export const displayFam = (user,position) => {
var relate = db.ref().child("Users").child(user).once("value", function(snapshot) {
    snapshot.forEach(function(item){
        var itemVal = item.val();

        if(itemVal.mother != null){
            displayFam(user,itemVal.mother);
            console.log(itemVal.Firstname + "'s mother is " + itemVal.mother);
        }
        else{
            console.log(itemVal.Firstname + " has no mother.");
        }
        if(itemVal.father != null){
            displayFam(user,itemVal.father);
            console.log(itemVal.Firstname + "'s father is " + itemVal.father);
        }
        else{
            console.log(itemVal.Firstname + " has no father.");
        }

    });
    console.log(snapshot.numChildren());
});

} 这是我的Firebase数据库上的当前数据，其中每个ID是一个用户：

{
"K469jg05DnZHqn8yzp1Ucghc12n2" : [ {
    "Firstname" : "Jonathan",
    "Lastname" : "Smith",
    "father" : 1,
    "gender" : "male",
    "mother" : 2
}, {
    "Firstname" : "Patrick",
    "Lastname" : "Smith",
    "gender" : "male",
    "mother" : 3
}, {
    "Firstname" : "Lisa",
    "Lastname" : "Smith",
    "gender" : "female"
}, {
    "Firstname" : "Amelia",
    "Lastname" : "Smith",
    "gender" : "female"
} ]
}

这是我输出的一部分：

Patrick's mother is 3
Patrick has no father.
Lisa has no mother.
Lisa has no father.
Amelia has no mother.
Amelia has no father.
Jonathan's mother is 2
Jonathan's father is 1
Patrick's mother is 3
Patrick has no father.
Lisa has no mother.
Lisa has no father.
Amelia has no mother.
Amelia has no father.
Jonathan's mother is 2
Jonathan's father is 1
Patrick's mother is 3
Patrick's mother is 3
Patrick has no father.
Lisa has no mother.
Lisa has no father.
Amelia has no mother.
Amelia has no father.
Jonathan's mother is 2
Jonathan's father is 1
Patrick's mother is 3

我希望只有这样：

Lisa has no mother.
Lisa has no father.
Amelia has no mother.
Amelia has no father.
Jonathan's mother is 2
Jonathan's father is 1
Patrick's mother is 3

我目前将所有内容输出到终端。

在写入Firebase数据时（无论是读取还是写入），它发送请求的次数太多了？

0 个答案: