flaskapp.py

from flask import Flask, render_template, request, redirect, url_for, flash
app = Flask(__name__)
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from database_setup import Base, Restaurant, MenuItem

engine = create_engine('sqlite:///restaurantmenu.db')
Base.metadata.bind = engine

DBSession = sessionmaker(bind=engine)
session = DBSession()


@app.route('/')
@app.route('/restaurants/<int:restaurant_id>/')
def restaurantMenu(restaurant_id):
	restaurant = session.query(Restaurant).filter_by(id = restaurant_id).one() 
	items = session.query(MenuItem).filter_by(restaurant_id = restaurant.id) 
	return render_template('menu.html',restaurant= restaurant , items = items)


@app.route('/restaurant/<int:restaurant_id>/new/', methods=['GET', 'POST'])
def newMenuItem(restaurant_id):
    if request.method == 'POST':
        newItem = MenuItem(
            name=request.form['name'], restaurant_id=restaurant_id)
        session.add(newItem)
        session.commit()
        flash("new menu item createad!")
        return redirect(url_for('restaurantMenu', restaurant_id=restaurant_id))
    else:
        return render_template('newmenu.html', restaurant_id=restaurant_id)

@app.route('/restaurant/<int:restaurant_id>/<int:menu_id>/edit',
           methods=['GET', 'POST'])
def editMenuItem(restaurant_id, menu_id):
    editedItem = session.query(MenuItem).filter_by(id=menu_id).one()
    if request.method == 'POST':
        if request.form['name']:
            editedItem.name = request.form['name']
        session.add(editedItem)
        session.commit()
        flash("item is edited")
        return redirect(url_for('restaurantMenu', restaurant_id=restaurant_id))
    else:
        # USE THE RENDER_TEMPLATE FUNCTION BELOW TO SEE THE VARIABLES YOU
        # SHOULD USE IN YOUR EDITMENUITEM TEMPLATE
        return render_template('editmenuitem.html', restaurant_id=restaurant_id, menu_id=menu_id, item=editedItem)

@app.route('/restaurant/<int:restaurant_id>/<int:menu_id>/delete' ,methods=['GET', 'POST'])
def deleteMenuItem(restaurant_id, menu_id):
    deleted = session.query(MenuItem).filter_by(id=menu_id).one()
    if request.method == 'POST':
    	session.delete(deleted)
    	session.commit()
    	flash("item is deleted")
    	return redirect(url_for('restaurantMenu', restaurant_id = restaurant_id))
    else:
    	return render_template('deletemenuitem.html' , item = deleted)


if __name__ == '__main__':
    app.debug = True
    app.secret_key = 'super_secret_key'
    app.run(host='0.0.0.0', port=5000)