How to detect changes in firebase child with python?

Question

I have some troubles with this application. What I need is that If I detect a change in the database (FIREBASE) particularly in \'sala\' and \'ventilacion\' nodes the functi

Answer 1

I know this post is 2 years old but hope this helps. Try using firebase_admin module.

Use this command - pip install firebase-admin

I too had a requirement where I needed to check for changes made to the Firebase database. I referred here

Following is a sample code based on your question which you can refer from and try it out.

import firebase_admin
from firebase_admin import credentials
from firebase_admin import db


cred = credentials.Certificate("path/to/serviceAccountKey.json")
firebase_admin.initialize_app(cred, {
    'databaseURL': 'https://example.firebaseio.com',
    'databaseAuthVariableOverride': None
})


def ignore_first_call(fn):
    called = False

    def wrapper(*args, **kwargs):
        nonlocal called
        if called:
            return fn(*args, **kwargs)
        else:
            called = True
            return None

    return wrapper


@ignore_first_call
def listener(event):
    print(event.event_type)  # can be 'put' or 'patch'
    print(event.path)  # relative to the reference, it seems
    print(event.data)  # new data at /reference/event.path. None if deleted

    node = str(event.path).split('/')[-2] #you can slice the path according to your requirement
    property = str(event.path).split('/')[-1] 
    value = event.data
    if (node=='sala'):
        #do something
    elif (node=='ventilacion'):
        #do something
    else:
        #do something else


db.reference('/').listen(listener)