I would like to substitute the templates-folder associated with my Blueprint and originally registered with that Blueprint to my Flask app. I have tried the following:
from flask import current_app as app
bp = Blueprint('myblueprint', __name__, template_folder='templates/en', url_prefix='/<lang_code>')
@bp.before_request
def verify_language():
# check if there are any parameters in the url and get lang_code
url_params = request.view_args
lang = (url_params and url_params.pop('lang_code', None)) or None
# if lang_code is given, make sure it is valid
if lang in ['en', 'fi']:
if lang == 'fi':
app.blueprints["myblueprint"].template_folder = 'templates/fi'
else:
app.blueprints["myblueprint"].template_folder = 'templates/en'
g.lang_code = lang
else:
return jsonify({"error": "Invalid Parameters (lang_code)"})
@bp.url_defaults
def add_language_code(endpoint, values):
values.setdefault('lang_code', g.lang_code)
I have similar .html-files with identical names under the "templates/en" and "templates/fi" folder, with the obvious exception that the site text has been translated to two different languages.
This works for one time when I enter my site, but then it stops working. So, once I enter my site and change the url-prefix lang_code to be "fi", I see my finnish site, but substituting "en" in the url does not show me the English site anymore.
I think this has to do with Flask adding the Blueprint templates folders to the app's search path, and then finding the first match for the "X.html" that I have in my
return render_template('X.html')
Is there a way to really substitute the Blueprint template folder registered to the app i.e. remove the first one while adding the other?
