Python Forum

I'm working from a basic skeleton code to build up this app but i have been facing issues just trying to initially run the app. after installing flask and flask-sqlalchemy when i type python3 app.py, the app starts with this

"Serving Flask app "app" (lazy loading)

Environment: production WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
Debug mode: on
Restarting with stat
Debugger is active!
Debugger PIN: 147-926-310
Running on http://127.0.0.1:3000/ (Press CTRL+C to quit)" then when clicking the link i run into this issue:"
but when i click on the link the build gets a error:
"werkzeug.routing.BuildError: Could not build url for endpoint 'contacts'. Did you mean 'static' instead?"


i also noticed im not getting flask-SQLAlchemy loaded even though i have installed it using pip3 install -U Flask-SQLAlchemy
and it was successful.

From the information you provided I can't really tell, if you could post part of the code where you do the 'routing' as well, that would be great. Also a full error traceback is always helpful.

Regarding the flask_sqlalchemy lib, make sure that your IDE is using the same python interpreter as the one you've installed the library in.

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well it seems that im getting this error in VSCode:
"{
"resource": "/C:/Python38/lib/site-packages/flask_sqlalchemy/__init__.py",
"owner": "_generated_diagnostic_collection_name_#2",
"severity": 4,
"message": "Import \"flask_sqlalchemy.model\" could not be resolved",
"source": "Pylance (reportMissingImports)",
"startLineNumber": 22,
"startColumn": 6,
"endLineNumber": 22,
"endColumn": 28
}
i did use the terminal in vscode to make sure i had installed flask and flask-sqlachemy, but for some reason i get this error in the code.

this is th main app.py file:

from flask import Flask, redirect, url_for, render_template, request, flash
from models import db, Contact

# Flask
app = Flask(__name__)
app.config['SECRET_KEY'] = '847rc0ruprguew09grywe8457398un9xfnhf7h302-3ru1430ntq=4r84230t723ct3'
app.config['DEBUG'] = True

# Database
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///book.sqlite'
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
app.config['DEBUG'] = True
db.init_app(app)
db.create_all()


@app.route("/")
def index():
    '''
    Home page
    '''
    return redirect(url_for('contacts'))


'''
Create new contact
'''


'''
Delete contact
'''


'''
Edit contact
'''


'''
Show alls contacts
'''


'''
Search contacts
'''



if __name__ == "__main__":
    app.run(port=3000)

Error:
Exception has occurred: ModuleNotFoundError
No module named 'flask_sqlalchemy'

Well you are redirecting from index to contacts endpoint, but I don't see the contacts endpoint defined anywhere

This was the skeleton project i received from the employer to work on and i have not done anything to it and i though it should have run for me to working on it.

(Oct-01-2020, 08:02 PM)mlieqo Wrote: [ -> ]Well you are redirecting from index to contacts endpoint, but I don't see the contacts endpoint defined anywhere

where would i find this endpoint "contacts" and where should it be defined?
between the static folder, templates, and web folders.
but what really stands out to me is the issue with flask_sqlalchemy not being imported with the errors just states Import "flask_sqlalchemy" could not be resolved Pylance (reportMIssingImports)

well I supose it should be right below this part

'''
Show alls contacts
'''

you should probably read up on flask, here is a quickstart - https://flask.palletsprojects.com/en/1.1.x/quickstart/

I can't really help you with the import error as I do not use Pylance, but I would bet that you have multiple interpreters, so you should check that.

(Oct-01-2020, 08:02 PM)mlieqo Wrote: [ -> ]Well you are redirecting from index to contacts endpoint, but I don't see the contacts endpoint defined anywhere

contacts.html is located in the templates folder within the web subfolder