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Added final project

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Mohammad Rameen 2025-09-14 10:57:37 +05:30
parent ae3377a907
commit 0eec7b0d7a
7 changed files with 162 additions and 0 deletions
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Visual Studio Code Projects/day-63-library-project-end/.DS_Store vendored Normal file
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Visual Studio Code Projects/day-63-library-project-end/instance/books.db Normal file
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Visual Studio Code Projects/day-63-library-project-end/main.py Normal file
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from flask import Flask, render_template, request, redirect, url_for
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column
from sqlalchemy import Integer, String, Float
'''
Red underlines? Install the required packages first:
Open the Terminal in PyCharm (bottom left).
On Windows type:
python -m pip install -r requirements.txt
On MacOS type:
pip3 install -r requirements.txt
This will install the packages from requirements.txt for this project.
'''
app = Flask(__name__)
# CREATE DATABASE
class Base(DeclarativeBase):
pass
app.config['SQLALCHEMY_DATABASE_URI'] = "sqlite:///books.db"
# Create the extension
db = SQLAlchemy(model_class=Base)
# initialise the app with the extension
db.init_app(app)
# CREATE TABLE
class Book(db.Model):
id: Mapped[int] = mapped_column(Integer, primary_key=True)
title: Mapped[str] = mapped_column(
String(250), unique=True, nullable=False)
author: Mapped[str] = mapped_column(String(250), nullable=False)
rating: Mapped[float] = mapped_column(Float, nullable=False)
# Create table schema in the database. Requires application context.
with app.app_context():
db.create_all()
@app.route('/')
def home():
# READ ALL RECORDS
# Construct a query to select from the database. Returns the rows in the database
result = db.session.execute(db.select(Book).order_by(Book.title))
# Use .scalars() to get the elements rather than entire rows from the database
all_books = result.scalars().all()
return render_template("index.html", books=all_books)
@app.route("/add", methods=["GET", "POST"])
def add():
if request.method == "POST":
# CREATE RECORD
new_book = Book(
title=request.form["title"],
author=request.form["author"],
rating=request.form["rating"]
)
db.session.add(new_book)
db.session.commit()
return redirect(url_for('home'))
return render_template("add.html")
@app.route("/edit", methods=["GET", "POST"])
def edit():
if request.method == "POST":
# UPDATE RECORD
book_id = request.form["id"]
book_to_update = db.get_or_404(Book, book_id)
book_to_update.rating = request.form["rating"]
db.session.commit()
return redirect(url_for('home'))
book_id = request.args.get('id')
book_selected = db.get_or_404(Book, book_id)
return render_template("edit_rating.html", book=book_selected)
@app.route("/delete")
def delete():
book_id = request.args.get('id')
# DELETE A RECORD BY ID
book_to_delete = db.get_or_404(Book, book_id)
# Alternative way to select the book to delete.
# book_to_delete = db.session.execute(db.select(Book).where(Book.id == book_id)).scalar()
db.session.delete(book_to_delete)
db.session.commit()
return redirect(url_for('home'))
if __name__ == "__main__":
app.run(debug=True)

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Visual Studio Code Projects/day-63-library-project-end/requirements.txt Normal file
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Flask==3.0.0
flask_sqlalchemy==3.1.1
SQLAlchemy==2.0.25

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Visual Studio Code Projects/day-63-library-project-end/templates/add.html Normal file
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Add Book</title>
</head>
<body>
<form action="{{ url_for('add') }}" method="POST">
<label>Book Name</label>
<input name="title" type="text" />
<label>Book Author</label>
<input name="author" type="text" />
<label>Rating</label>
<input name="rating" type="text" />
<button type="submit">Add Book</button>
</form>
</body>
</html>

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Visual Studio Code Projects/day-63-library-project-end/templates/edit_rating.html Normal file
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Edit Rating</title>
</head>
<body>
<form action="{{ url_for('edit') }}" method="POST">
<p>Book Name: {{book.title}}</p>
<p>Current Rating {{book.rating}}</p>
<input hidden="hidden" name="id" value="{{book.id}}" />
<input name="rating" type="text" placeholder="New Rating" />
<button type="submit">Change Rating</button>
</form>
</body>
</html>

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Visual Studio Code Projects/day-63-library-project-end/templates/index.html Normal file
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Library</title>
</head>
<body>
<h1>My Library</h1>
{% if books == []: %}
<p>Library is empty.</p>
{% endif %}
<ul>
{% for book in books %}
<li>
<a href="{{ url_for('delete', id=book.id) }}">Delete</a>
{{book.title}} - {{book.author}} - {{book.rating}}/10
<a href="{{ url_for('edit', id=book.id) }}">Edit Rating</a>
</li>
{% endfor %}
</ul>
<a href="{{ url_for('add') }}">Add New Book</a>
</body>
</html>