Building a CRUD application with Flask and SQLAlchemy
Please execute the following commands:
::
$ sudo apt-get install git python3-virtualenv python3-pip sqlitebrowser
$ git clone https://github.com/macagua/flask-crud-app.git
$ cd ./flask-crud-app
$ virtualenv --python=/usr/bin/python3 venv
$ source ./venv/bin/activate
$ pip3 install -r requirements.txt
Please execute the following command:
::
$ python3 bookmanager.py
* Serving Flask app "bookmanager" (lazy loading)
* Environment: production
WARNING: Do not use the development server in a production environment.
Use a production WSGI server instead.
* Debug mode: on
* Running on http://0.0.0.0:8087/ (Press CTRL+C to quit)
* Restarting with stat
* Debugger is active!
* Debugger PIN: 245-060-649
127.0.0.1 - - [04/Jul/2019 14:21:17] "GET / HTTP/1.1" 200 -
127.0.0.1 - - [04/Jul/2019 14:21:18] "GET /favicon.ico HTTP/1.1" 404 -
Open at your Web browser the following link http://127.0.0.1:8087
.. image:: https://raw.githubusercontent.com/macagua/flask-crud-app/master/docs/_static/bookmanager.png :class: image-inline
db.session.commit()::
INSERT INTO book (title) VALUES ('The Hobbie');
INSERT INTO book (title) VALUES ('The Lord of Rings');
INSERT INTO book (title) VALUES ('The Silmarillion');
INSERT INTO book (title) VALUES ('The Children of Húrin');
COMMIT;
UPDATE book
SET title='The Lord of the Rings'
WHERE title = 'The Lord of Rings';
COMMIT;
Book.query.all()::
SELECT * FROM book;
Book.query.filter_by(title=oldtitle).first()::
SELECT book.title
FROM book
WHERE book.title = 'The Hobbie'
LIMIT 1 OFFSET 0;
db.session.delete(book)::
DELETE FROM book
WHERE book.title = 'The Children of Húrin';
