Questions tagged [flask]
The flask tag has no usage guidance.
118
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do not get the chance to fill out any input and select fields
Everytime I run flask run and go to the website, I cant see any of the input fields. Instead, I get the message 'must contain a number'.What am I doing wrong?
{% extends "layout.html" %}
{% ...
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1
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17
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Lecture 9, how to get default value from `flask.request.get` after submitting a form?
In Lecture 9, we learnt about Flask. Prof David taught us in the first couple sections by creating a Python file called app.py, and two similar HTML files that have different code in their bodies, ...
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25
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Problem 9: Finance - flask run error
When I enter flask run in the command line it appears to give the normal response but when I click on the link provided in the terminal, it opens a page in firefox titled:
"problem loading page&...
0
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1
answer
77
views
Check50 PSET9 Finance Failing Throughout
First post here...seems I'm coming unstuck at the pointy end of the course. Hahaha!
My code doesn't seem to be passing Check50 through Quotes/Buy/Sell - although the functionality seems to be fine ...
- 3
0
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2
answers
67
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TypeError: 'NoneType' object is not subscriptable in PSET9, but working manually
I am working on pset9 Finance. I have implemented the functionality for purchasing stocks, and it works well when I manually test it. However, when I run the CS50's check50 validation, it returns an ...
- 21
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11
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PSET9/Finance Blocked by login/register issue
Attached the issue that I'm getting and I don't understand what I did in my code that was wrong.
Here's register function. Am I missing something here...?
def register():
"""...
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0
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153
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Harvard's CS50 course keeps saying my finance (pset 9) code is shooting status cod. What am I doing wrong?
import os, werkzeug, datetime
from cs50 import SQL
from flask import Flask, flash, redirect, render_template, request, session
from flask_session import Session
from tempfile import mkdtemp
from ...
- 1
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91
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Pset9 Check50: buy handles valid purchase
I'm almost done with Finance but my solution doesn't pass the last tests of Check50. I'm stuck on the buy function. Check50 outputs the following: "buy handles valid purchase expected to find &...
- 1
0
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1
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282
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CS50 2023 Finance Check50 issue
There is no way to get rid of the following check50 error:
:( logging in as registered user succeeds
application raised an exception (see the log for more details)
I found through googling that in ...
0
votes
1
answer
67
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Finance app - object is not subscriptable
I have problems with pset 9 finance.
Since days I try to figure out what is wrong with my code for the sell route.
I know that there a handfull of similar questions on StackExchange/StackOverflow but ...
- 5
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36
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In 'Finance' how do I get the page to load?
I have not been able to get any page to load for the Finance problem (even without me messing about with it!). I tried deleting everything and starting again like so:
$ wget https://cdn.cs50.net/2021/...
- 1
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1
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74
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PSET9 FINANCE SQLITE "no such column exists" while multiplying two columns to update a third
In the Index function on APP.PY of my finance code, I'm getting "RuntimeError: no such column: total_per_share" even though I'm using "AS" to create this column -- please advise.
@...
- 53
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2
answers
4k
views
AttributeError: 'function' object has no attribute 'method'
Hey guys I've been working on my final project. I keep running into this error
When I run flask, this error occurs
File "/home/ubuntu/project/app.py", line 88, in login
if request.method == &...
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1
answer
152
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Flask/Python PSET9 Finance -- Using PRINT() to debug
Having some problems with INDEX that I figure printing variable content to console will help me solve. BUT no matter what I try, print(variable) doesn't result in anything at all on the console/...
- 53
0
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1
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252
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Lab9 -- Buttons to delete DB entries don't work
Can anyone please tell me why my "Remove Entry" from DB buttons don't work?
I included the python.app code below the HTML:
<!DOCTYPE html>
<html lang="en">
...
- 53
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1
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55
views
Should I deploy flask app for the final project?
I’m working on a final project, which is a web application using Flask. For it to be graded, should I deploy it on Heroku or only submit my source files. I’m not familiar with Heroku, and from what I ...
- 113
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2
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110
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Is there a way in jinja to display a block in a specific page?
I have a layout.html page with a <footer> that I want to display in almost all pages using {% extends "layout.html %}. Only in the user profile page the footer will be different. How can I ...
- 123
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1
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693
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Flask Filter Search/List in Python
I created a country list on the python search page section, the data is sent to the Html table with jinja syntax “ The Html table also has a JavaScript function it functions correctly no help with ...
- 67
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1
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936
views
jinja code not working inside html file
I am using flask for the first time and jinja code is being displayed on the webpage.
this is my html file:
<!DOCTYPE html>
<html lang="en">
<head>
...
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1
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868
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PSET9 / can't check until a frown turns upside down
I am getting this message in the following checks
:| sell page has all required elements/
:| sell handles invalid number of shares
:| sell handles valid sale
I guess the problem is in by sell or buy ...
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0
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106
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ADD EXTRA CASH IN FINANCE
Trying to add extra cash to my pset finance. I have made as you can see below in the picture, that is adding an extra part of code to the index function(), but I'm just getting a 404 answer. Why is it ...
- 1
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1
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2k
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Check if query returns empty value
I am trying to check using (IF / ELSE) if my query returns any value. What is the simplest way to do this?
Thanks
result = db.execute("SELECT * FROM home WHERE id = ? AND name = ?", str(conn)...
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1
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259
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Runtime Error Unsupported Value in pset9 Finance
I'm doing Pset09 "Finance" and I have been stuck in the "index" function for quite a while. I tried to use the already existing "trans" table but I am getting an error. ...
- 3
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1
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2k
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Calling a javascript function from flask
For my final project, I am creating a flask web mapping application, which with user input displays different things on a map.
At the moment, when they input a place name via a form, my python ...
- 103
1
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1
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136
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pset9 // register function not registering user
I am having this problem with my register function in pset9 when i register on the web app it says error 500 internal server error and when i check my terminal it says:
return self.view_functions[rule....
- 27
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341
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What's wrong with my register function? (Pset9 - Finance)
Here's my register function in application.py:
@app.route("/register", methods=["GET", "POST"])
def register():
"""Register user"""
...
- 1
0
votes
2
answers
519
views
CS50 IDE gives error for flask run
I was able to run flask run till yesterday. But today it is not working, it has been giving errors for SQL and I have been able to code today. It gives me this error continuously.
ERROR: Error on ...
- 1
0
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1
answer
725
views
Generate dynamic datefields from selected dropdown value sent to another route in Flask
EDIT
With the good help of @DinoCoderSaurus, I realised that I overlooked adding a POST method to the datainput form and the routes also lacked GET and POST methods.
Adding those modifications helped ...
- 11
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1
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197
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Can't update shopping cart for more than one item, works fine for a single item, otherwise only the first one gets updated
I am trying to update the quantity of the products in the shopping cart by changing the number in the dropdown. If the cart has two or more items then only the first one works and the qty doesn't ...
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1
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170
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Blocked on C$50 Finance suggested personal touch feature - adapting index page to enable transactions in situ
Dug into the docs and trawled all the usual online sources but starting to suspect that I'm trying to solve this in a way that's impossible!
This is how I've edited the index page to allow user input ...
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1
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83
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Final Project: Problem to UPDATE table (Flask and SQLite) - RuntimeError ("unsupported value: {}".format(value))
I'm working on a project tracking web app, in which users can create and categorise their own projects. There are more options, but a project can mainly be categorised as active or paid/finished. Any ...
- 3
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730
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Problem with endblock tag in finance. "endblock" tag unknown
{% extends "layout.html" %}
{% block title %}
Quote
{% endblock %}
{% block main %}
<form action="/quote" method="post">
<div class="form-...
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3k
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raise JSONDecodeError("Expecting value", s, err.value) from None json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
@app.route('/api/<string:isbn>', methods = ['GET'])
def isbn(isbn):
#import api from Goodreads (stats)
book_data = db.execute("SELECT * FROM books WHERE isbn=:isbn",{'isbn':isbn})....
- 1
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0
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29
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Final Project: dynamic page creation to show just 10 SQL entries per page
I'm developing a web-page for my CS50's Final Project for contacting japanese students around Argentina. The only official japanese exam takes place in Buenos Aires, and there are no many good places ...
1
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2
answers
3k
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Finance: UNIQUE constraint failed: users.username
I've been struggling with this for days. Ignore the '1234' hardcoded into the "insert into" line, just using that to isolate problems. The problem I'm facing is with the username being ...
0
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1
answer
498
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RuntimeError: missing value for placeholder (:name)
all! I'm doing the final project, and I have a form whose contents I'm trying to submit to a database.
My python code is:
@app.route("/Contact.html", methods=["GET", "POST"])
def Contact():
if ...
- 1
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0
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19
views
Join table seems showing an error
I tried this statement on the adminer postgreSql database online database query tool and works but when i try to code it into my FLASK app showing nothing.
lists = db.execute("SELECT b.isbn,b.author,...
- 1
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1
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93
views
Nesting SQL queries in Flask (final project)
I've been trying to only insert new ids if they weren't inserted before in my database, but the problem I've been having is that I couldn't get the nested queries to work in Python Flask. Whatever I ...
2
votes
1
answer
2k
views
Flask Sessions Not Working
I'm using VS Code and following along Brian's Flask class in Web50.
I have copied his notes program word for word, and somehow I get different results. I've downloaded Flask and Sessions, so that's ...
- 23
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0
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54
views
Trying to flask run the task session on the CS50 web Lecture DATABASE issue
I had a great time learning about HTML and CSS. Then came this intimidating flask feature. I was able to create a session["username"] to login and logout. I'm trying to use session to create a todo ...
0
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1
answer
85
views
Internal Error Served if user doesn't own any shares or sell all his shares in Finance
When i sell all the shares i own or even in the case of a new registered user who doesn't own any shares; it doesn't redirect to "/" i.e the main index page but serves me an internal error. It works ...
0
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1
answer
275
views
Unsure of what my DATABASE_URL is
I am using windows 10 (64-bit) and am following the course "Web Programming with python and Javascript" in CS50, in which i wanted to use my computer as a local host to store the table content. I am ...
- 101
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116
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Deleting SQL dynamically with Flask
I want to delete a specific row in my database but I don't know how to do it.
On my HTML I have this:
<div class="cases">
{% for row in rows %}
<div class="card border-success mb-...
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0
answers
2k
views
(psycopg2.errors.UndefinedTable) relation "users" does not exist
when i try to load up regster.html i get this error
"sqlalchemy.exc.ProgrammingError: (psycopg2.errors.UndefinedTable) relation "users" does not exist
LINE 1: INSERT INTO users(username,password) ...
- 101
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690
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CS50W: "flask.cli.NoAppException" Can anyone explain this?
flask.cli.NoAppException: While importing "application", an ImportError was raised: Traceback (most recent call last): File "c:\users\hp\appdata\local\programs\python\python38\lib\site-packages\flask\...
- 1
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1
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2k
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error while trying to update database using python and sqlalchemy
While I was trying to run create.py file having the following code:
import os
from flask import Flask, render_template, request
from models import *
app = Flask(__name__)
app.config["...
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160
views
How to ensure proper database url in environment variable?
I am trying to run the code from lecture3 and I am having trouble ensuring the database url is properly set using the environment variable. Here's the code:
db_url = 'postgresql+psycopg2://{username}:...
- 101
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1
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476
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Can't access 127.0.0.1 and 0.0.0.0 in CS50 IDE
I am on my final project and i have a simple flask app and and index html template. There are no errors in my app, however when i run flask, flask run, it says Running on http://127.0.0.1:5000/ (Press ...
- 41
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1
answer
513
views
Error in Flask application
Internal Server Error
The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.
below is the code in ...
0
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1
answer
44
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finance: how to build an "active" table
I wish to know how to build a table (in HTML) where the row expand with the row I input on it.
For a static table I've used:
<table style="width:100%">
<tr>
<th>Symbol</...
- 153