My functions seens to work fine, but when i have that redirect the user to the homepage (redirect("/")) the application crash and show the error message: 500 internal server error and I don't know if I'm wrong in the function (def index()) or in the redirect("/"). How may i solve this?? Thanks in advance. Here is my fully code (i don't even know how to publish a code here sorry):
import os
from cs50 import SQL
from flask import Flask, flash, jsonify, redirect, render_template, request, session
from flask_session import Session
from tempfile import mkdtemp
from werkzeug.exceptions import default_exceptions, HTTPException, InternalServerError
from werkzeug.security import check_password_hash, generate_password_hash
from helpers import apology, login_required, lookup, usd
# Configure application
app = Flask(__name__)
# Ensure templates are auto-reloaded
app.config["TEMPLATES_AUTO_RELOAD"] = True
# Ensure responses aren't cached
@app.after_request
def after_request(response):
response.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
response.headers["Expires"] = 0
response.headers["Pragma"] = "no-cache"
return response
# Custom filter
app.jinja_env.filters["usd"] = usd
# Configure session to use filesystem (instead of signed cookies)
app.config["SESSION_FILE_DIR"] = mkdtemp()
app.config["SESSION_PERMANENT"] = False
app.config["SESSION_TYPE"] = "filesystem"
Session(app)
# Configure CS50 Library to use SQLite database
db = SQL("sqlite:///finance.db")
# Make sure API key is set
if not os.environ.get("API_KEY"):
raise RuntimeError("API_KEY not set")
@app.route("/")
@login_required
def index():
"""Show portfolio of stocks"""
user = db.execute("SELECT * FROM users WHERE id = :id",id=session["user_id"])[0]["cash"]
user = round(user, 2)
transactions = db.execute("SELECT * FROM portifolio WHERE id = :id", id=session["user_id"])
# save in list
stocks = []
# get all data and put in dict
for trans in transactions:
symbol = trans["stock"]
shares = trans["shares"]
stock_data = lookup(symbol)
temp_dict = {
"symbol": symbol,
"name": stock_data["name"],
"shares": shares,
"price": round(stock_data["price"], 2),
"total": round(stock_data["price"] * shares, 2)
}
stocks.append(temp_dict)
# get users current wealth
total_money = round(user + sum([stock["total"] for stock in stocks]), 2)
return render_template("index.html", stocks=stocks, money=total_money, user=user)
@app.route("/buy", methods=["GET", "POST"])
@login_required
def buy():
"""Buy shares of stock"""
if request.method == "POST":
symbol = request.form.get("symbol")
shares = request.form.get("shares")
quote = lookup(symbol)
user_id = session["user_id"]
if quote == None:
return apology("invalid symbol", 400)
if not isinstance(shares, int):
return apology("input is not a positive integer", 400)
if shares <= 0:
return apology("can't buy a negative number of shares or 0 share", 400)
rows = db.execute("SELECT cash FROM users WHERE id = :user_id", user_id=user_id)
total_cash = rows[0]["cash"]
price = quote["price"]
cost = price * shares
if cost > total_cash:
return apology("you don't have enough funds")
db.execute("UPDATE users SET cash = cash - :price WHERE id = :user_id", price=cost, user_id=user_id)
db.execute("INSERT INTO transactions (user_id, symbol, shares, price) VALUES(:user_id, :symbol, :shares, :price)", user_id=user_id, symbol=symbol, shares=shares, price=price)
flash("Bought!")
return redirect("/")
else:
return render_template("buy.html")
@app.route("/history")
@login_required
def history():
"""Show history of transactions"""
user_id=session["user_id"]
transactions = db.execute("SELECT symbol, shares, price_per_share, created_at FROM transactions WHERE user_id = :user_id ORDER BY created_at ASC", user_id=user_id)
return render_template("history.html", transactions=transactions)
@app.route("/login", methods=["GET", "POST"])
def login():
"""Log user in"""
# Forget any user_id
session.clear()
# User reached route via POST (as by submitting a form via POST)
if request.method == "POST":
# Ensure username was submitted
if not request.form.get("username"):
return apology("must provide username", 403)
# Ensure password was submitted
elif not request.form.get("password"):
return apology("must provide password", 403)
# Query database for username
rows = db.execute("SELECT * FROM users WHERE username = :username",
username=request.form.get("username"))
# Ensure username exists and password is correct
if len(rows) != 1 or not check_password_hash(rows[0]["hash"], request.form.get("password")):
return apology("invalid username and/or password", 403)
# Remember which user has logged in
session["user_id"] = rows[0]["id"]
# Redirect user to home page
return redirect("/")
# User reached route via GET (as by clicking a link or via redirect)
else:
return render_template("login.html")
@app.route("/logout")
def logout():
"""Log user out"""
# Forget any user_id
session.clear()
# Redirect user to login form
return redirect("/")
@app.route("/quote", methods=["GET", "POST"])
@login_required
def quote():
"""Get stock quote."""
symbol = request.form.get("symbol")
if request.method == "POST":
quote = lookup(symbol)
if quote == None:
return apology("invalid symbol", 400)
return render_template("quoted.html", quote=quote)
else:
return render_template("quote.html")
@app.route("/register", methods=["GET", "POST"])
def register():
"""Register user"""
if request.method == 'POST':
username = request.form.get('username')
password = generate_password_hash(request.form.get('password'))
confirmation = request.form.get("confirmation")
if not username:
return apology("must provide username", 400)
elif not request.form.get("password"):
return apology("must provide password", 400)
elif not confirmation:
return apology("must provide equal password", 400)
elif request.form.get("password") != confirmation:
return apology("passwords do not match", 400)
double_username= db.execute("SELECT username FROM users where username = :username", username=username)
if double_username:
return apology("username already taken", 400)
row = db.execute("INSERT INTO users (username, hash) VALUES(:username, :hash)", username=username, hash=password)
session["user_id"] = row
flash("Registered!")
return redirect("/")
else:
return render_template("register.html")
@app.route("/sell", methods=["GET", "POST"])
@login_required
def sell():
"""Sell shares of stock"""
if request.method == "POST":
symbol = request.form.get = ("symbol")
shares = request.form.get("shares")
user_id=session["user_id"]
quote = lookup(symbol)
if quote == None:
return apology("invalid symbol", 400)
if quote == None:
return apology("invalid symbol", 400)
if not isinstance(shares, int):
return apology("input is not a positive integer", 400)
if shares <= 0:
return apology("can't have a negative number of shares or 0 share", 400)
stock = db.execute("SELECT SUM(shares) as total_shares FROM transactions WHERE user_id = :user_id AND symbol = :symbol GROUP BY symbol", user_id=user_id, symbol=symbol)
if len(stock) != 1 or stock[0]["total_shares"] <= 0 or stock[0]["total_shares"] < shares:
return apology("can't sell a negative number of shares or 0 share or more than you own", 400)
rows = db.execute("SELECT cash FROM users WHERE id = :user_id", user_id=user_id)
total_cash = rows[0]["cash"]
price = quote["price"]
cost = price * shares
db.execute("UPDATE users SET cash = cash + :price WHERE id = :user_id", price=cost, user_id=user_id)
db.execute("INSERT INTO transactions (user_id, symbol, shares, price) VALUES(:user_id, :symbol, :shares, :price)", user_id=user_id, symbol=symbol, shares=-shares, price=price)
flash("Sold!")
return redirect("/")
else:
stocks = db.execute("SELECT symbol, SUM(shares) as total_shares FROM transactions WHERE user_id = :user_id GROUP BY symbol HAVING total_shares > 0", user_id=user_id)
return render_template("sell.html", stocks=stocks)
def errorhandler(e):
"""Handle error"""
if not isinstance(e, HTTPException):
e = InternalServerError()
return apology(e.name, e.code)
# Listen for errors
for code in default_exceptions:
app.errorhandler(code)(errorhandler)
~/finance/ $ export API_KEY=pk_1d9ce2d967864e6cb4696426a0902311
~/finance/ $ flask run
* Serving Flask app "application.py" (lazy loading)
* Environment: development
* Debug mode: off
* Running on https://b32edcbd-c7d9-46fc-883b-2d754eec3461-ide.cs50.xyz:8080/ (Press CTRL+C to quit)
* Restarting with stat
INFO:werkzeug:192.168.228.165 - - [01/May/2020 16:18:33] "GET / HTTP/1.0" 302 -
INFO:werkzeug:192.168.143.107 - - [01/May/2020 16:18:33] "GET /login HTTP/1.0" 200 -
INFO:werkzeug:192.168.143.107 - - [01/May/2020 16:18:34] "GET /static/styles.css HTTP/1.0" 200 -
INFO:werkzeug:192.168.143.107 - - [01/May/2020 16:18:45] "GET /register HTTP/1.0" 200 -
INFO:werkzeug:192.168.143.107 - - [01/May/2020 16:18:45] "GET /static/styles.css HTTP/1.0" 200 -
DEBUG:cs50:INSERT INTO users (username, hash) VALUES('top', 'pbkdf2:sha256:150000$yU2ahu9E$49206c3e7959c998b394c9cecc0f6a507c1fbf18565fbed2796b626574d34ade')
INFO:werkzeug:192.168.143.107 - - [01/May/2020 16:18:51] "POST /register HTTP/1.0" 302 -
DEBUG:cs50:SELECT * FROM users WHERE id = 3
DEBUG:cs50:SELECT * FROM portifolio WHERE id = 3
ERROR:application:Exception on / [GET]
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 2446, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1951, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1820, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise
raise value
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1949, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1935, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/home/ubuntu/finance/helpers.py", line 34, in decorated_function
return f(*args, **kwargs)
File "/home/ubuntu/finance/application.py", line 74, in index
return render_template("index.html", stocks=stocks, money=total_money, user=user)
File "/usr/local/lib/python3.7/site-packages/flask/templating.py", line 140, in render_template
ctx.app,
File "/usr/local/lib/python3.7/site-packages/flask/templating.py", line 120, in _render
rv = template.render(context)
File "/usr/local/lib/python3.7/site-packages/jinja2/environment.py", line 1090, in render
self.environment.handle_exception()
File "/usr/local/lib/python3.7/site-packages/jinja2/environment.py", line 832, in handle_exception
reraise(*rewrite_traceback_stack(source=source))
File "/usr/local/lib/python3.7/site-packages/jinja2/_compat.py", line 28, in reraise
raise value.with_traceback(tb)
File "/home/ubuntu/finance/templates/index.html", line 1, in top-level template code
{% extends "layout.html" %}
File "/home/ubuntu/finance/templates/layout.html", line 63, in top-level template code
{% block main %}{% endblock %}
File "/home/ubuntu/finance/templates/index.html", line 22, in block "main"
<td>{{ cash_remaining | usd }}</td>
File "/home/ubuntu/finance/helpers.py", line 63, in usd
return f"${value:,.2f}"
TypeError: unsupported format string passed to Undefined.__format__
INFO:werkzeug:192.168.143.107 - - [01/May/2020 16:18:51] "GET / HTTP/1.0" 500 -
INFO:werkzeug:192.168.143.107 - - [01/May/2020 16:18:51] "GET /static/styles.css HTTP/1.0" 200 -
this is the prompt at the moment
{}button in the format bar; and 2) add the traceback information that appears in the flask terminal.