This fork contains some not yet merged features of Pony ORM. Be careful while using it.
Changes against github.com/ponyorm/pony:
- Support of ORM migrations: branch
orm-migrationsof original repository is merged - Support of enums (ponyorm#392) with added support for IntEnum, which are stored int database as int, not as strings (see
enumbranch or commit 3098977f) - Support of inheritance,
_table_options and indecies in migrations: https://github.com/andgein/pony/tree/support-table-options-and-indecies-in-migrations
Pony is an advanced object-relational mapper. The most interesting feature of Pony is its ability to write queries to the database using Python generator expressions and lambdas. Pony analyzes the abstract syntax tree of the expression and translates it into a SQL query.
Here is an example query in Pony:
select(p for p in Product if p.name.startswith('A') and p.cost <= 1000)
Pony translates queries to SQL using a specific database dialect. Currently Pony works with SQLite, MySQL, PostgreSQL and Oracle databases.
By providing a Pythonic API, Pony facilitates fast app development. Pony is an easy-to-learn and easy-to-use library. It makes your work more productive and helps to save resources. Pony achieves this ease of use through the following:
- Compact entity definitions
- The concise query language
- Ability to work with Pony interactively in a Python interpreter
- Comprehensive error messages, showing the exact part where an error occurred in the query
- Displaying of the generated SQL in a readable format with indentation
All this helps the developer to focus on implementing the business logic of an application, instead of struggling with a mapper trying to understand how to get the data from the database.
See the example here
Pony ORM is Apache 2.0 licensed open source project. If you would like to support Pony ORM development, please consider:
Pony ORM also has the Entity-Relationship Diagram Editor which is a great tool for prototyping. You can create your database diagram online at https://editor.ponyorm.com, generate the database schema based on the diagram and start working with the database using declarative queries in seconds.
Documenation is available at https://docs.ponyorm.org The documentation source is avaliable at https://github.com/ponyorm/pony-doc. Please create new documentation related issues here or make a pull request with your improvements.
Pony ORM is released under the Apache 2.0 license.
Please post your questions on Stack Overflow. Meet the PonyORM team, chat with the community members, and get your questions answered on our community Telegram group. Join our newsletter at ponyorm.org. Reach us on Twitter.
Copyright (c) 2013-2019 Pony ORM. All rights reserved. info (at) ponyorm.org