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')
});firestore update map
let initialData = {
name: 'Frank',
age: 12,
favorites: {
food: 'Pizza',
color: 'Blue',
subject: 'recess'
}
};
let updateNested = db.collection('users').doc('Frank').update({
age: 13,
'favorites.color': 'Red'
});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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