I am adding localisation to my Flask app with Flask-Babel, and I cannot seem to change the language. I followed all the Babel instructions for creating the po/mo files - I don't believe my issue is related to the translation data... its that I don't know how to change languages... which seems like it would/should be obvious.
My debugging shows that babel.localeselector is not being called. My implementation calls refresh(), which I think should call babel.localeselector (somehow... because I don't see how it works, as the refresh() command seems to just delete some keys from the app context... I don't know how that triggers the call to babel.localeselector)
app = Flask(__name__)
babel = Babel(app)
@babel.localeselector
def get_locale():
# if a user is logged in, use the locale from the user settings
user = User.get_by_id(session['user_id'])
if user is not None: return user.lang
return 'en'
and, when the user logs in, this function is called,
from flask_babel import refresh
def login(user_id):
# Gets called when user successfully logs in
refresh()
I have confirmed refresh() is being called.
But the language is not changed.
UPDATED: Also tried this,
from flask import current_app
from common.models import User
from flask_babel import refresh
def login(user_id):
# Gets called when user successfully logs in
user = User.get_by_id(user_id)
current_app.config['BABEL_DEFAULT_LOCALE'] = user.lang
refresh()
Figured out the problem. I was using,
import gettext
_ = gettext.gettext
instead of,
from flask_babel import gettext as _