adding new methods to entities #143

jonaprieto opened this Issue Sep 14, 2015 · 1 comment


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Is there any way to add a method to entity after his definition in an appropriate way? Because I had tried it, but pony rise ImplementionError. I've found out, that I can add a method iff the method starts and ends with underscore like the following: Entity._newmethod_ and everything works like charm. But, I really want to call the method without the underscores. Or I am doing something wrong? Thanks.

Btw. I added the methods with a decorator, wrapped them with that.

Thanks authors.

@kozlovsky kozlovsky added this to the 0.6.2 milestone Sep 22, 2015
@kozlovsky kozlovsky self-assigned this Sep 22, 2015

This restriction is obsolete, I'll remove it. Now it will be possible to freely assign methods to entities. This will be part of the next release PonyORM 0.6.2

@kozlovsky kozlovsky closed this in 98fe051 Sep 22, 2015
@kozlovsky kozlovsky added a commit that referenced this issue Jan 11, 2016
@kozlovsky kozlovsky Pony ORM Release 0.6.2 (2015-01-11)
The documentation was moved from this repo to a separate one at
The compiled version can be found at

# New features

* Python 3.5 support
* #132, #145: raw_sql() function was added
* #126: Ability to use @db_session with generator functions
* #116: Add support to select by UUID
* Ability to get string SQL statement using the Query.get_sql() method
* New function delete(gen) and Query.delete(bulk=False)
* Now it is possible to override Entity.__init__() and declare custom entity methods

# Backward incompatible changes

* Normalizing table names for symmetric relationships
* Autostrip - automatically remove leading and trailing characters

# Bugfixes

* #87: Pony fails with pymysql installed as MySQLdb
* #118: Pony should reconnect if previous connection was created before process was forked
* #121: Unable to update value of unique attribute
* #122: AssertionError when changing part of a composite key
* #127: a workaround for incorrect pysqlite locking behavior
* #136: Cascade delete does not work correctly for one-to-one relationships
* #141, #143: remove restriction on adding new methods to entities
* #142: Entity.select_random() AssertionError
* #147: Add 'atom_expr' symbol handling for Python 3.5 grammar
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