https://github.com/shosca/sqlalchemy-hilo

HiLo generators for SQLAlchemy
https://github.com/shosca/sqlalchemy-hilo

Last synced: 8 days ago
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HiLo generators for SQLAlchemy

• Host: GitHub
• URL: https://github.com/shosca/sqlalchemy-hilo
• Owner: shosca
• License: other
• Created: 2016-11-14T13:38:53.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2016-11-19T23:45:06.000Z (almost 8 years ago)
• Last Synced: 2024-09-23T06:36:29.882Z (about 2 months ago)
• Language: Python
• Homepage:
• Size: 3.91 KB
• Stars: 4
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.rst
  • License: LICENSE

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README

        
SQLAlchemy HiLo PK Generator

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

There are two flavors of the HiLo generator, ``HiLoGenerator`` and

``RowPerTableHiLoGenerator``. ``HiLoGenerator`` will create a single

column table to keep track of the ``hi`` value:

.. code:: sql

    CREATE TABLE single_hilo (

        next_hi BIGINT NOT NULL

    )

``RowPerTableHiLoGenerator`` will create a two column table to keep

track of the ``hi`` value per table per row:

.. code:: sql

    CREATE TABLE row_per_table_hilo (

            table_name VARCHAR(255) NOT NULL,

            next_hi BIGINT NOT NULL,

            PRIMARY KEY (table_name)

    )

You can use them in your models like any other ``Sequence``:

.. code:: python

    class Entity(Base):

        id = Column(BigInteger(), HiLoGenerator(), primary_key=True)

        ...

or

.. code:: python

    class Entity(Base):

        id = Column(BigInteger(), RowPerTableHiLoGenerator(), primary_key=True)

        ...