microsoft/debugpy

debubpy + autoreload not working with FlaskForm

morindo opened this issue · 1 comments

morindo commented

Greetings, I'm not sure if this issue is related to debugpy or FlaskForm implementation but here's the problem.

I'm using VS Code + debugpy extension to debug my Flask/Python code and I've also activated the autoReload feature to enable code reload. When I debug my Flask app there is no problem when I change code and refresh my page, it takes all the changes without the need to restart my app. But when I change a FlaskForm, the code is not autoReload and I get the following message in my VS Code (Python Debugger) Debug Console saying that debugpy was not able to reload the code due to a NoneType class.

VS Code Debug Console

code reload: Start reloading module: "app.routes.pages.strategies.forms" ... 
code reload: Type of: _unbound_fields (old: <class 'list'> != new: <class 'NoneType'>) changed... Skipping.
code reload: Type of: _wtforms_meta (old: <class 'type'> != new: <class 'NoneType'>) changed... Skipping.
code reload: reload finished without applying any change

forms.py

from flask_wtf import FlaskForm
from wtforms import (
    StringField,
)
from wtforms.validators import DataRequired, Length


class StrategyForm(FlaskForm):
    name = StringField(
        "Name",
        validators=[DataRequired(), Length(min=3, max=40)],
        render_kw={"placeholder": "Strategy Name"},
    )

launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Python Debugger: Flask",
            "type": "debugpy",
            "request": "launch",
            "module": "flask",
            "env": {
                "FLASK_APP": "app",
                "FLASK_DEBUG": "1",
                "FLASK_ENV": "development"
            },
            "autoReload": {
                "enable": true
            },
            "args": [
                "run",
                "--no-debugger",
                "--no-reload"
            ],
            "jinja": true,
            "justMyCode": true
        }
    ]
}

Is this issue related to debugpy or FlaskForm?

Thank you very very much!

Environment data

  • debugpy version: 1.8.2
  • OS and version: Windows 11
  • Python version (& distribution if applicable, e.g. Anaconda): Python 3.1
  • Using VS Code or Visual Studio: VS Code
  • Flask-WTF version: 1.2.1
  • Flask version: 3.0.3

Expected behavior

I think that VS Code should be able to auto reload changes when a FlaskForm is modified and saved.

rchiodo commented

Thanks for the issue but it looks like changing a type is not suppported. The code detecting that is here:

https://github.com/fabioz/PyDev.Debugger/blob/54f8db469c2d8c31635db7cc59a10bc8dab76057/_pydevd_bundle/pydevd_reload.py#L293

@fabioz might know more but I don't believe you can change everything and get the reload to work.

  • ❤️1