add building crud app with flask tutorial

Author: x4nth055

README.md

@@ -100,8 +100,6 @@ This is a repository of all the tutorials of [The Python Code](https://www.thepy
     - [How to Get the Size of Directories in Python](https://www.thepythoncode.com/article/get-directory-size-in-bytes-using-python). ([code](general/calculate-directory-size))
     - [How to Get Geographic Locations in Python](https://www.thepythoncode.com/article/get-geolocation-in-python). ([code](general/geolocation))
     - [How to Assembly, Disassembly and Emulate Machine Code using Python](https://www.thepythoncode.com/article/arm-x86-64-assembly-disassembly-and-emulation-in-python). ([code](general/assembly-code))
-    - [Detecting Fraudulent Transactions in a Streaming Application using Kafka in Python](https://www.thepythoncode.com/article/detect-fraudulent-transactions-with-apache-kafka-in-python). ([code](general/detect-fraudulent-transactions))
-    - [Asynchronous Tasks with Celery in Python](https://www.thepythoncode.com/article/async-tasks-with-celery-redis-and-flask-in-python). ([code](https://github.com/bassemmarji/flask_sync_async))
     - [How to Change Text Color in Python](https://www.thepythoncode.com/article/change-text-color-in-python). ([code](general/printing-in-colors))
     - [How to Create a Watchdog in Python](https://www.thepythoncode.com/article/create-a-watchdog-in-python). ([code](general/directory-watcher))
     - [How to Convert Pandas Dataframes to HTML Tables in Python](https://www.thepythoncode.com/article/convert-pandas-dataframe-to-html-table-python). ([code](general/dataframe-to-html))
@@ -199,4 +197,9 @@ This is a repository of all the tutorials of [The Python Code](https://www.thepy
     - [How to Add Audio to Video in Python](https://www.thepythoncode.com/article/add-audio-to-video-in-python). ([code](python-for-multimedia/add-audio-to-video))
     - [How to Compress Images in Python](https://www.thepythoncode.com/article/compress-images-in-python). ([code](python-for-multimedia/compress-image))
 
+- ### [Web Programming]()
+    - [Detecting Fraudulent Transactions in a Streaming Application using Kafka in Python](https://www.thepythoncode.com/article/detect-fraudulent-transactions-with-apache-kafka-in-python). ([code](general/detect-fraudulent-transactions))
+    - [Asynchronous Tasks with Celery in Python](https://www.thepythoncode.com/article/async-tasks-with-celery-redis-and-flask-in-python). ([code](https://github.com/bassemmarji/flask_sync_async))
+    - [How to Build a CRUD App with Flask and SQLAlchemy in Python](https://www.thepythoncode.com/article/building-crud-app-with-flask-and-sqlalchemy). ([code](web-programming/bookshop-crud-app-flask))
+
 For any feedback, please consider pulling requests.

web-programming/bookshop-crud-app-flask/LICENSE

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2022 Ezzeddin Abdullah
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

web-programming/bookshop-crud-app-flask/README.md

@@ -0,0 +1 @@
+# [How to Build a CRUD App with Flask and SQLAlchemy in Python](https://www.thepythoncode.com/article/building-crud-app-with-flask-and-sqlalchemy)

web-programming/bookshop-crud-app-flask/app/__init__.py

@@ -0,0 +1,14 @@
+from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
+from config import config
+
+db = SQLAlchemy()
+
+
+def create_app(config_name):
+    app = Flask(__name__)
+    app.config.from_object(config[config_name])
+    config[config_name].init_app(app)
+
+    db.init_app(app)
+    return app

web-programming/bookshop-crud-app-flask/app/models.py

@@ -0,0 +1,17 @@
+from . import db
+
+
+class Book(db.Model):
+    __tablename__ = 'books'
+    isbn = db.Column(db.Integer, primary_key=True)
+    author = db.Column(db.String(100), nullable=False)
+    title = db.Column(db.String(100), nullable=False)
+    price = db.Column(db.Float)
+
+    def to_json(self):
+        return {
+            'isbn': self.isbn,
+            'author': self.author,
+            'title': self.title,
+            'price': self.price
+        }

web-programming/bookshop-crud-app-flask/app/routes.py

@@ -0,0 +1,59 @@
+import os
+from . import create_app
+from .models import Book
+from . import db
+from flask import jsonify, request, abort
+
+app = create_app(os.getenv('FLASK_CONFIG') or 'default')
+
+
+@app.route("/book/list", methods=["GET"])
+def get_books():
+    books = Book.query.all()
+    return jsonify([book.to_json() for book in books])
+
+
+@app.route("/book/<int:isbn>", methods=["GET"])
+def get_book(isbn):
+    book = Book.query.get(isbn)
+    if book is None:
+        abort(404)
+    return jsonify(book.to_json())
+
+
+@app.route("/book/<int:isbn>", methods=["DELETE"])
+def delete_book(isbn):
+    book = Book.query.get(isbn)
+    if book is None:
+        abort(404)
+    db.session.delete(book)
+    db.session.commit()
+    return jsonify({'result': True})
+
+
+@app.route('/book', methods=['POST'])
+def create_book():
+    if not request.json:
+        abort(400)
+    book = Book(
+        title=request.json.get('title'),
+        author=request.json.get('author'),
+        price=request.json.get('price')
+    )
+    db.session.add(book)
+    db.session.commit()
+    return jsonify(book.to_json()), 201
+
+
+@app.route('/book/<int:isbn>', methods=['PUT'])
+def update_book(isbn):
+    if not request.json:
+        abort(400)
+    book = Book.query.get(isbn)
+    if book is None:
+        abort(404)
+    book.title = request.json.get('title', book.title)
+    book.author = request.json.get('author', book.author)
+    book.price = request.json.get('price', book.price)
+    db.session.commit()
+    return jsonify(book.to_json())

web-programming/bookshop-crud-app-flask/bookshop.py

@@ -0,0 +1,8 @@
+from app import db
+from app.routes import app
+from app.models import Book
+
+
+@app.shell_context_processor
+def make_shell_context():
+    return dict(db=db, Book=Book)

web-programming/bookshop-crud-app-flask/config.py

@@ -0,0 +1,31 @@
+import os
+
+
+class Config:
+    SQLALCHEMY_TRACK_MODIFICATIONS = False
+
+    @staticmethod
+    def init_app(app):
+        pass
+
+
+class DevelopmentConfig(Config):
+    DEBUG = True
+    SQLALCHEMY_DATABASE_URI = os.getenv("DEV_DATABASE_URL")
+
+
+class TestingConfig(Config):
+    TESTING = True
+    SQLALCHEMY_DATABASE_URI = os.getenv("TEST_DATABASE_URL")
+
+
+class ProductionConfig(Config):
+    SQLALCHEMY_DATABASE_URI = os.getenv("DATABASE_URL")
+
+
+config = {
+    'development': DevelopmentConfig,
+    'testing': TestingConfig,
+    'production': ProductionConfig,
+    'default': DevelopmentConfig
+}