我正在尝试从 firebase 中的单个键中检索数据

Question

I am trying to retrieve data from a single key in firebase.

var ratingRef = firebase.database().ref("hollywood/");
ratingRef.orderByValue().on("value", function(data) {
    data.forEach(function(data) {
        var name = ("The " + data.val().name + " rating is " + data.val().director + data.val().year);
        var pic = data.val().src;
        alert(pic)
        var fame = $("#tame").attr("src", pic + "<div>")
        $("#test").append(name + " <br>");
    });
});

Answer 1

Try it out this way:

var ratingRef = firebase.database().ref("hollywood/").orderBy("value");
function checkrating(ratingRef){
  ratingRef.forEach(data => {
    var name = ("The " + data.val().name + " rating is " + data.val().director + data.val().year);
        var pic = data.val().src;
        alert(pic)
        var fame = $("#tame").attr("src", pic + "<div>")
        $("#test").append(name + " <br>");
  });
}
checkrating(ratingRef)

if this doesn't help, try explaining the problem further or telling us the error in your console