Firestore Python API: Quickstart Reference Guide

pip install firebase-admin

pip install google-cloud-firestore

import firebase_adminfrom firebase_admin import credentialsfrom firebase_admin import firestorePROJECT_ID = ...cred = credentials.Certificate('firebase-adminsdk.json')# cred = credentials.ApplicationDefault()default_app = firebase_admin.initialize_app(cred, {  'projectId': PROJECT_ID,})firestore_client = firestore.client()

from google.cloud import firestore# firestore_client = firestore.Client()firestore_client = firestore.Client.from_service_account_json('firestore.json')

doc_ref = firestore_client.collection('user').document()

doc_ref = firestore_client.collection('user').document('desmond')

user_ref = firestore_client.collection('user').document('desmond')claim_ref = user_ref.collection('claim').document()

doc_ref = firestore_client.collection('user').document('desmond')data = {    'name': Desmond,    'age': 40}doc_ref.set(data)

doc_ref = firestore_client.collection('user').document('desmond')data = {    'friends': ['Jack', 'Mei Ru']}doc_ref.update(data)

data = {    'friends': firestore.DELETE_FIELD}doc_ref.update(data)

doc_ref = firestore_client.collection('user').document('desmond')doc_ref.delete()

doc_ref = firestore_client.collection('user').document('desmond')doc = doc_ref.get()if doc.exists:    print(doc.id, doc.get('name'), doc.to_dict())

user_ref = firestore_client.collection('user')query = user_ref \    .where('country', '==', 'Malaysia') \    .where('age', '>=', 21)docs = query.stream()for doc in docs:    print(doc.id, doc.get('name'), doc.to_dict())

row_count = len(list(docs))

doc = next(docs, None)if doc:    print(doc.id, doc.get('name'), doc.to_dict())

query = user_ref.where('country', '==', 'Malaysia').order_by('age')

query = user_ref.where('country', '==', 'Malaysia').order_by('age', direction=firestore.Query.DESCENDING)

batch = firestore_client.batch()number_ref = firestore_client.collection('number')for i in range(10):    data = {        'sequence': i    }    number_ref = collection_ref.document()    batch.set(number_ref, data)batch.commit()

transaction = firestore_client.transaction()user_ref = firestore_client.collection('user').document('desmond')@firestore.transactionaldef update_user_transaction(transaction, user_ref):    doc = user_ref.get(transaction=transaction)    transaction.update(user_ref, {        'name_uppercase': doc.get('name').upper()        })update_user_transaction(transaction, user_ref)

from google.cloud.firestore_v1 import Incrementuser_ref = firestore_client.collection('user').document('desmond')user_ref.update({'like_count': Increment(1)})

import datetimefrom google.cloud.firestore_v1 import SERVER_TIMESTAMPuser_ref = firestore_client.collection('user').document('desmond')user_ref.set({    'created': SERVER_TIMESTAMP,    'local_created': datetime.datetime.now(),    'name': 'Desmond'    })