javascript - 从 firebase 和唯一键检索数据

Question

我将从 Firebase 数据库检索数据。这是我的数据库的架构

datatable-18f93
  -L5pD-jh_Xpqq6bq2eDS
    text: "HELEO"
  -L5pDT-IpB4BsFMiABv_
    text: "HELEO"
  -L5pPwXnuTsSXN9pXpJ5
    text: "popopo"

我创建了一个获取路由来获取数据

router
  .route("/")
  .get(function (req, res, err) {
    console.log("test", req.body)

    // Get a database reference to our posts
    var db = admin.database();
    var ref = db.ref("/");

    // Attach an asynchronous callback to read the data at our posts reference
    ref.on("value", function (snapshot) {
      console.log(snapshot.val())
      res.send(snapshot.val());

    }, function (errorObject) {
      console.log("The read failed: " + errorObject.code);
    });
  });

这条路线还打印唯一的 key

{ '-L5pD-jh_Xpqq6bq2eDS': { text: 'HELEO' },
  '-L5pDT-IpB4BsFMiABv_': { text: 'HELEO' },
  '-L5pPwXnuTsSXN9pXpJ5': { text: 'popopo' } }

我想要的只是没有id的对象。我怎样才能得到那个？ 这是一个例子

{ text: 'HELEO' },
{ text: 'HELEO' },
{ text: 'popopo' }

Answer 1

您需要循环遍历快照并将 obj 元素插入新数组

ref.once("value", function (snapshot) {
    var list = [];
    snapshot.forEach(function(elem) {
        list.push(elem.val());
    });
    res.send(list);
}, function (errorObject) {
  console.log("The read failed: " + errorObject.code);
});