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 2 months 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
- License: mit
- Created: 2018-09-28T11:02:44.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2025-03-07T11:28:18.000Z (4 months ago)
- Last Synced: 2025-04-05T05:33:12.346Z (3 months 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: 103 KB
- Stars: 13
- Watchers: 2
- Forks: 10
- Open Issues: 0
-
Metadata Files:
- Readme: README.rst
- License: LICENSE
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README
======================
example.flask.crud-app
======================
.. image:: https://raw.githubusercontent.com/macagua/example.flask.crud-app/master/docs/_static/flask-vertical.png
:class: image-inline
Building a CRUD application with Flask and SQLAlchemy
Requirements
============
Please execute the following commands:
::
$ sudo apt install -y python3-dev python3-pip python3-virtualenv
$ sudo apt install -y git
$ sudo apt install -y sqlite3
$ git clone https://github.com/macagua/example.flask.crud-app.git flask-crud-app
$ cd ./flask-crud-app
$ virtualenv --python /usr/bin/python3 venv
$ source ./venv/bin/activate
$ pip3 install -U pip
$ pip3 install -r requirements.txt
----
Running
=======
Please execute the following command:
::
$ python3 bookmanager.py
Open at your Web browser the following link http://127.0.0.1:5000/
.. image:: https://raw.githubusercontent.com/macagua/example.flask.crud-app/master/docs/_static/bookmanager.png
:class: image-inline
Display a **Book Manager** app, like the previous figure.
----
SQLAlchemy to SQL
=================
The following code is an example of how SQLAlchemy translates
the Python code to SQL code.
**db.session.commit()**
Insert the following books into the database:
::
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 the title of the book 'The Lord of Rings' to 'The Lord of the Rings':
::
UPDATE book
SET title='The Lord of the Rings'
WHERE title = 'The Lord of Rings';
COMMIT;
----
**Book.query.all()**
Search for all books:
::
SELECT * FROM book;
**Book.query.filter_by(title=old_title).first()**:
Search for the book with the title 'The Hobbie':
::
SELECT book.title
FROM book
WHERE book.title = 'The Hobbie'
LIMIT 1 OFFSET 0;
----
**db.session.delete(book)**:
Delete the book with the title 'The Children of Húrin':
::
DELETE FROM book
WHERE book.title = 'The Children of Húrin';
----
License
========
This project is licensed under the MIT License - see the `LICENSE <./LICENSE>`_ file for details.
----
References
==========
- `Building a CRUD application with Flask and SQLAlchemy `_.
- `SQLAlchemy Unified Tutorial `_.
- `Modifying and Querying Data — Flask-SQLAlchemy Documentation `_.