firebase connect to database throwing invalid Database URL-CodePudding

I have a simply python app and I am trying to connect to Firebase, I downloaded my cert.json file and have a valid certificate that authenticates however when I try to create a reference to the database as according to the docs, it throws the following error:

File "C:\Python3\lib\site-packages\firebase_admin\db.py", line 69, in reference client = service.get_client(url) File "C:\Python3\lib\site-packages\firebase_admin\db.py", line 798, in get_client raise ValueError( ValueError: Invalid database URL: "None". Database URL must be a non-empty URL string.

I have added my code below:

import firebase_admin
import os
from firebase_admin import db
from firebase_admin import credentials

certfile = "firebase_cert.json"

credentials = credentials.Certificate(certfile)
database = firebase_admin.initialize_app(credentials)

ref = db.reference("/")
print(ref)

thanks in advance!

CodePudding user response：

As the Firebase documentation for initializing the Admin SDK in Python shows, you will need to specify the URL for your document in your application code:

# Fetch the service account key JSON file contents
cred = credentials.Certificate('path/to/serviceAccountKey.json')

# Initialize the app with a service account, granting admin privileges
firebase_admin.initialize_app(cred, {
    'databaseURL': 'https://databaseName.firebaseio.com' //