firestore update array
let washingtonRef = db.collection('cities').doc('DC');
// Atomically add a new region to the "regions" array field.
let arrUnion = washingtonRef.update({
regions: admin.firestore.FieldValue.arrayUnion('greater_virginia')
});
// Atomically remove a region from the "regions" array field.
let arrRm = washingtonRef.update({
regions: admin.firestore.FieldValue.arrayRemove('east_coast')
});document.set() firebasefirestore java
var washingtonRef = db.collection("cities").doc("DC");
// Atomically add a new region to the "regions" array field.
washingtonRef.update({
regions: firebase.firestore.FieldValue.arrayUnion("greater_virginia")
});
// Atomically remove a region from the "regions" array field.
washingtonRef.update({
regions: firebase.firestore.FieldValue.arrayRemove("east_coast")
});Copyright © 2021 Codeinu
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