从Firebase查询阵列(React Native) [英] Querying array from Firebase (React Native)

问题描述

我是React-native和Firebase的新手，我正在构建一个应用程序.我偶然发现了在Firebase中使用数组"的问题(我知道Firebase无法与数组一起使用)，但是我想知道是否有某种方法可以检索此数据.

I'm new to react-native and firebase, and I am building an app. I stumble upon a problem using "array" in firebase (i know that firebase doesn't work with array), but I want to know if there is some way to retrieve this data.

这是我在服务器中拥有的数据，我想获取所有带有产品"id"(红色)的购买商品

This is the data I have in the server, and I want to get all the purchases that have the product "id" (in red)

我尝试使用下面的代码和一些变体，但未成功，返回null

I tried to use the code below and some variants but no success, returns null

firebase.database().ref('purchases').orderByChild("products/id")
.equalTo("-Lgida0VKuZZ6V7K0LkH").on('value', function (rawPurchases)

我想知道是否有一种获取此信息的方法.

I want to know if there is a way to get this information.

谢谢.

推荐答案

var scoresRef = firebase.database().ref("purchases");
scoresRef.orderByChild("products").on("value", function(snapshot) {
  snapshot.forEach(function(data) {
    console.log("The " + data.id + " data is " + data.val());
  });
});

尝试此方法并查看更多

try this method and review more here

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