如何以正确的方式获取所有数据firebase实时数据库JavaScript



我使用node.js,从firebase实时数据库中获取数据。问题是我得到的数据是这样的:

用于数据获取代码!JS

import firebaseApp from '../config.js';
import { getDatabase, ref, onValue } from "firebase/database";

const userRef = ref(database, "Users");
onValue(userRef, (snapshot) => {
if (snapshot.exists) {
const data = snapshot.val();
console.log(data); // data printed to console
}
}, {
onlyOnce: true
});

控制台输出

{

"random-user-id-1": {
"name": "Jhon Doe",
"profile": "profilelink",
"email": "example@email.com"
},

"random-user-id-2": {
"name": "Cr7",
"profile": "profilelink",
"email": "example@email.com"
},
// and more...
}

我想将此数据显示为对象数组。预期输出示例

[
{
"name": "Jhon Doe",
"profile": "profilelink",
"email": "example@email.com"
},

{
"name": "Cr7",
"profile": "profilelink",
"email": "example@email.com"
}
// and more........ ^_~
]
任何帮助我们都将不胜感激!请随时询问与我的问题或问题有关的任何疑问

谢谢:(

您似乎只需要dict中的值,您可以通过以下方式转换数据:

const lst = {

"random-user-id-1": {
"name": "Jhon Doe",
"profile": "profilelink",
"email": "example@email.com"
},

"random-user-id-2": {
"name": "Cr7",
"profile": "profilelink",
"email": "example@email.com"
},
}
const expectedFormatRes = Object.values(lst);

console.log(expectedFormatRes);

Gil的答案的替代方案是使用Firebase的内置。forEach操作:

if (snapshot.exists) {
let values = [];
snapshot.forEach((child) => {
value.push(child.val());
})
console.log(values);
}

虽然时间更长,但它的优点是它保持了数据库返回数据的顺序,当您在查询中指定orderBy...子句时,这一顺序就变得相关了。。