Question
Flask custom module import working locally fine, errors with app platform
- Posted on April 9, 2024
- FlaskDigitalOcean App Platform
Asked by Hadi
I have a flask app with the following structure
orthocms
-orthocms.py
-helper.py
orthocms/app
--__init__.py
--forms.py
--models.py
I define helper as the following to use globally without the need for importing it into every page
from app import app
import helper
@app.context_processor
def inject_user():
return dict(helper=helper)
When I test the app locally, I can safely use helper.* functions in templates, however, after deploying with app platform I get the following error
{{ helper.format_date(p.birth_date) }}
jinja2.exceptions.UndefinedError: 'helper' is undefined
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Hi there,
It’s generally a good practice to use absolute imports to avoid such issues. What you can try doing is to modify the import statement in
orthocms.pyto reflect the full path:I’m assuming here that
orthocmsis a package, andhelperis a module in that package.If this still does not work, as a debugging step, you can temporarily import
helperdirectly in the template or view where it’s used to see if that resolves the issue. If it does, the problem is likely with how the context is passed or with the import path.Let me know how it goes!
Best,
Bobby