Question

7

Firebase search by child value

rated 0 times [ 13] [ 6] / answers: 1 / hits: 98146 / 8 Years ago, mon, november 7, 2016, 12:00:00

I have the following structure on my Firebase database:

I would like to search for a user by name, last name or email but as I don't have the user key in the level above I don't know how I can achieve this. I'm doing and administrator session so it wouldn't have access to the user key.

I have tried:

let usersRef = firebase.database().ref('users');

usersRef.orderByValue().on("value", function(snapshot) {

    console.log(snapshot.val());

    snapshot.forEach(function(data) {

        console.log(data.key);

    });

});

But it brings all the users on the database. Any ideas?

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daquanmilesw

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answered 8 Years ago brendan · Accepted Answer

You can use equalTo() to find any child by value. In your case by name:

ref.child('users').orderByChild('name').equalTo('John Doe').on(value, function(snapshot) {

    console.log(snapshot.val());

    snapshot.forEach(function(data) {

        console.log(data.key);

    });

});

The purpose of orderByChild() is to define the field you want to filter/search for. equalTo() can get an string, int and boolean value.

Also can be used with auto generated keys (pushKey) too.

You can find all the documentation here