如何遍历我从snapshot.val()接收的数据并将其推入基于键的数组 [英] How to loop through the data I receive from snapshot.val() and push it to an array based on keys
问题描述
我想根据用户键遍历从snapshot.val()
接收到的数据,并将其推入数组.我尝试在像这样的for..in循环的帮助下完成此任务,
I want to loop through the data I receive from snapshot.val()
based on user keys and push them into an array. I tried doing it with the help of for..in loop like this,
firebase.database().ref('\interests').child("I would like to dine with").on('value', (snapshot) => {
var data = snapshot.val();
if(snapshot.exists()){
for(let key in data){
console.log("data[key]",data[key]);
this.intVal.push(data[key]);
console.log("intVal",this.intVal);
}
}
})
但是我得到的是这样的东西
But I'm getting something like this,
如果您注意到,我的第一个数组在一个用户键下包含1个对象,而我的第二个数组在其用户键下包含3个对象.如何将每个值推入单独的数组中?
If you notice, my first array contains 1 object under a user key and my second array contains 3 objects under their user keys. How can I push every single value in a separate array?
任何帮助将不胜感激!谢谢
Any help would be much appreciated! Thanks
推荐答案
有一个 DataSnapshot.forEach()
方法正是为此目的:
There is a DataSnapshot.forEach()
method precisely for this purpose:
firebase.database().ref('\interests').child("I would like to dine with").on('value', (snapshot) => {
snapshot.forEach((child) => {
console.log(child.key, child.val());
this.intVal.push(child.val());
console.log("intVal",this.intVal);
});
}
})
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