https://github.com/macagua/example.flask.crud-app

Building a CRUD application with Flask and SQLAlchemy
https://github.com/macagua/example.flask.crud-app

flask flask-application flask-sqlalchemy flask-web python3

Last synced: about 1 month ago
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Building a CRUD application with Flask and SQLAlchemy

• Host: GitHub
• URL: https://github.com/macagua/example.flask.crud-app
• Owner: macagua
• Created: 2018-09-28T11:02:44.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2021-03-20T00:07:01.000Z (almost 4 years ago)
• Last Synced: 2023-03-11T01:11:42.056Z (almost 2 years ago)
• Topics: flask, flask-application, flask-sqlalchemy, flask-web, python3
• Language: Python
• Homepage: https://www.codementor.io/garethdwyer/building-a-crud-application-with-flask-and-sqlalchemy-dm3wv7yu2
• Size: 33.2 KB
• Stars: 14
• Watchers: 2
• Forks: 10
• Open Issues: 1
• Metadata Files:
  • Readme: README.rst

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README

        
==============

flask-crud-app

==============

Building a CRUD application with Flask and SQLAlchemy

Requeriments

============

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

Running

=======

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

SQLAlchemy to SQL

=================

**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';

Reference

=========

- https://www.codementor.io/garethdwyer/building-a-crud-application-with-flask-and-sqlalchemy-dm3wv7yu2

- https://docs.sqlalchemy.org/en/latest/orm/tutorial.html

- http://flask-sqlalchemy.pocoo.org/2.3/queries/