Railway•15mo ago

Deployment Issue: ModuleNotFoundError for Flask with Poetry-based Project

Hello, I'm having trouble deploying a Flask app on Railway using Poetry for dependency management. Despite having Flask listed in my pyproject.toml file, the deployment logs keep showing a ModuleNotFoundError for Flask. I've verified that Flask is correctly specified in my pyproject.toml. Has anyone encountered this issue when deploying with Poetry on Railway? Any guidance would be much appreciated. Thank you!

10 Replies

Percy•15mo ago

Project ID: 1fdaefcc-07e9-4a72-870a-ccc581cf5b25

caleb4536•15mo ago

1fdaefcc-07e9-4a72-870a-ccc581cf5b25

Brody•15mo ago

do you happen to also have a requirements.txt file?

furi.mu•15mo ago

Please share what you're filling out in pyproject.toml.

caleb4536•15mo ago

Hey Brody and Furimu, Thanks for getting back so quick! @Brody : Yep, was using poetry with a pyproject.toml before. Switched over to a requirements.txt now for the Railway deploy. @furimu : About the pyproject.toml - it had the usual stuff, dependencies and all. But since I'm on requirements.txt now, not sure if that matters anymore. Still, if you wanna see it, just let me know. Got the app up on Railway, but hitting an endpoint doesn’t give any response. Kinda stumped here. Here is my procfile:

web: gunicorn app:app

web: gunicorn app:app

and my app.py

from flask import Flask, jsonify
# import oss

app = Flask(__name__)

@app.route('/test', methods=['GET'])
def test():
    return "Hello, World!"

if __name__ == "__main__":
    app.run()

from flask import Flask, jsonify
# import oss

app = Flask(__name__)

@app.route('/test', methods=['GET'])
def test():
    return "Hello, World!"

if __name__ == "__main__":
    app.run()

and the command I'm using to call the server curl -X GET <url>/test Thanks a ton for the help!

Brody•15mo ago

what is the url? btw, what i was getting at was that railway checks for a requirements.txt before it checks for a pyproject.toml, and will use whatever it finds first so im gussing it found the requirements.txt file and it didnt have flask in it it may be a typo, but just thought id mentioned it, you said procfile but that file requires a capital P

furi.mu•15mo ago

If it's a Module not found error, it's not Procfile's fault. @CalebPlease share what you're filling out in requirements.txt

Brody•15mo ago

would you happen to be using ai to answer these questions?

furi.mu•15mo ago

no, sorry i use deepl

Brody•15mo ago

okay then please translate and read the persons message you are replying to

Gaming

Programming

Deployment Issue: ModuleNotFoundError for Flask with Poetry-based Project