Querying array from Firebase (React Native) [duplicate]

问题

This question already has an answer here:

Firebase query if child of child contains a value (1 answer)

Closed 1 year ago.

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.

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

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)

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

Thanks.

回答1:

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());
  });
});

try this method and review more here

来源：https://stackoverflow.com/questions/56659730/querying-array-from-firebase-react-native