Firestore increment field
const userRef = db.collection('documents').doc('document_id');
const increment = firebase.firestore.FieldValue.increment(1);
userRef.update({ FieldToIncrease: increment });Firestore increment field
const userRef = db.collection('documents').doc('document_id');
const increment = firebase.firestore.FieldValue.increment(1);
userRef.update({ FieldToIncrease: increment });firestore set a document
let data = {
name: 'Los Angeles',
state: 'CA',
country: 'USA'
};
// Add a new document in collection "cities" with ID 'LA'
let setDoc = db.collection('cities').doc('LA').set(data);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 cloud function update documents
import * as functions from 'firebase-functions';
import * as admin from 'firebase-admin';
admin.initializeApp();
export const setProductsToExpired = functions.https.onRequest(async(request, response) => {
const expiredProducts = await admin.firestore()
.collection('products')
.where('timestamp','<=', admin.firestore.Timestamp.now())
.get();
const batch = admin.firestore().batch();
expiredProducts.forEach(doc => {
batch.update(doc.ref,'expired',true);
});
await batch.commit();
//Successful operation
response.send("200");
});firestore create document with auto id
// Add a new document with a generated id.
db.collection("cities").add({
name: "Tokyo",
country: "Japan"
})
.then(function(docRef) {
console.log("Document written with ID: ", docRef.id);
})
.catch(function(error) {
console.error("Error adding document: ", error);
});
---------------------------
//If you want to specify id then use .set()
// e.x /
db.collection("cities").doc("TYO").set({
name: "Tokyo",
country: "Japan"
})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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