app.py

import os
from forms import AddForm, DelForm
from flask import Flask, render_template, redirect, url_for
from flask_sqlalchemy import SQLAlchemy
from flask_migrate import Migrate

app = Flask(__name__)
app.config['SECRET_KEY'] = 'mykey'

basedir = os.path.abspath(os.path.dirname(__file__))
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///' + os.path.join(basedir, 'data.sqlite')
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False

db = SQLAlchemy(app)
Migrate(app, db)


##################################################
class Puppy(db.Model):
    __tablename__ = 'puppies'
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.Text)

    def __init__(self, name):
        self.name = name

    def __str__(self):
        return f'Puppy name: {self.name}'


##################################################

@app.route('/')
def index():
    return render_template('index.html')


@app.route('/add', methods=['GET', 'POST'])
def add_pup():
    form = AddForm()
    if form.validate_on_submit():
        name = form.name.data
        new_pup = Puppy(name)
        db.session.add(new_pup)
        db.session.commit()
        return redirect(url_for('list_pup'))
    return render_template('add.html', form=form)


@app.route('/list')
def list_pup():
    puppies = Puppy.query.all()
    return render_template('list.html', pup_all=puppies)


@app.route('/delete', methods=['GET', 'POST'])
def del_pup():
    form = DelForm()
    if form.validate_on_submit():
        pup_id = form.id.data
        pup = Puppy.query.get(pup_id)
        db.session.delete(pup)
        db.session.commit()
        return redirect(url_for('list_pup'))
    return render_template('delete.html', form=form)


##########################################################


if __name__ == '__main__':
    app.run()