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Python3 で Cloud Firestore のデータを作成 (Create)

Last updated at Posted at 2020-01-24

ライブラリーのインストール

sudo pip install --upgrade firebase-admin
firestore_create.py
#! /usr/bin/python
#
import sys
import datetime
import firebase_admin
from firebase_admin import credentials
from firebase_admin import firestore


# ------------------------------------------------------------------
def add_data_proc(db,key,name,population):
	sys.stderr.write("key = " + key + "\n")
	doc_ref = db.collection('cities').document(key)
	doc_ref.set({
		'name': name,
		'population': population,
		'date_mod': datetime.datetime.utcnow()
	})
#
# ------------------------------------------------------------------
sys.stderr.write("*** 開始 ***\n")
try:
	cred = credentials.ApplicationDefault()
	firebase_admin.initialize_app(cred, {
		'projectId': 'my-project-2020-01-22',
		})

	db = firestore.client()
#
	add_data_proc(db,'t0921','宇都宮', 38921)
	add_data_proc(db,'t0922','小山', 56417)
	add_data_proc(db,'t0923','佐野', 92385)
	add_data_proc(db,'t0924','足利', 39546)
	add_data_proc(db,'t0925','日光', 18492)
#

except Exception as ee:
	sys.stderr.write("*** error *** in firestore.Client ***\n")
	sys.stderr.write(str(ee) + "\n")
#
sys.stderr.write("*** 終了 ***\n")
# ------------------------------------------------------------------

実行コマンド

export GOOGLE_APPLICATION_CREDENTIALS="***.json"
./firestore_create.py

次のバージョンで確認しました。

$ python --version
Python 3.8.6

プロジェクトがないと次のようなエラーが出ます。

*** error *** in firestore.Client ***
404 The project project-jan25-2020 does not exist or it does not contain an active Cloud Datastore or Cloud Firestore database.
 Please visit http://console.cloud.google.com to create a project or https://console.cloud.google.com/datastore/setup?project=project-jan25-2020 to add a Cloud Datastore or Cloud Firestore database.
 Note that Cloud Datastore or Cloud Firestore always have an associated App Engine app and this app must not be disabled.

次のようなエラーが出たら API を有効にする必要があります。

*** error *** in firestore.Client ***
400 The Cloud Firestore API is not available for Datastore Mode projects.

次のようなエラーが出たら、CREDENTIALS の json ファイルを作り直します。

*** error *** in firestore.Client ***
403 Missing or insufficient permissions.

実行がうまく行くと、次のようなデータが作成されます。

firestore_dec16.png

CREDENTIALS の json ファイルは、次の方法でも作成できます。

gcloud beta auth application-default login
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