javascript - 如何从对象 [Firebase 唯一键] 中检索数据

Question

This is the data that i want to retrieve

How can I retrieve the data without knowing the unique ID?

        var query = firebase.database().ref("/Venue").orderByKey();
    query.on("value", function (snapshot) {
            snapshot.forEach(function (childSnapshot) {
                var key = childSnapshot.key;
                var childData = childSnapshot.val();
                console.log(childData);                                                                                         
            });
        });

Answer 1

使用 Object.values 来提供帮助。它返回对象属性值的数组

由于 .Data 只有一个属性，您可以轻松获取它的值，它将位于索引 0 处

var query = firebase.database().ref("/Venue").orderByKey();
query.on("value", function (snapshot) {
    snapshot.forEach(function (childSnapshot) {
        var key = childSnapshot.key;
        var childData = childSnapshot.val();
        console.log(Object.values(childData.Data)[0]); // change
    });
});