Flask 2.3.0 removed `before_first_request` decorator

[mikhail-tokarev]

as new Flask version was released on 25 April (https://flask.palletsprojects.com/en/2.3.x/changes/#version-2-3-0) the Flask example is not valid anymore.

What the best way to use rollbar with the latest Flask?

[danielmorell]

Hi @mikhail-tokarev, thank you for pointing that out.

Here is a pretty simple setup that will capture errors in a Flask v2.3 app.

from pathlib import Path
from flask import Flask
import rollbar
from rollbar.contrib.flask import report_exception
from flask import got_request_exception

app = Flask(__name__)

with app.app_context() as ctx:
    rollbar.init(
        '<access_token>',
        '<env>',
        # Other configs
    )

    got_request_exception.connect(report_exception, ctx.app)

@app.index("/")
def index():
    not_a_real_function()  # This should cause an error.
    return "<h1>Hello, World!</h1>

I will circle back and make sure our examples get updated.