Carpentry

Lean models for Python.

This is an implementation of "models" similar to those you see in most ORMs / forms definition systems, but with the main goal of keeping things as simple as possible.

No metaclasses or descriptors are involved; no hackish code messing up with standard Python objects functionality either.

Documentation

Documentation is hosted by Read The Docs: http://carpentry.readthedocs.org/

Example model definition

from carpentry.base import BaseObject
from carpentry.common_fields import StringField, IntegerField

class MyModel(BaseObject):
    first_name = StringField()
	last_name = StringField()
	age = IntegerField()

Then, you can use it like this:

>>> obj = MyModel()

>>> obj.first_name = 'Hello'

>>> obj.age = 20

>>> obj.age = 'invalid'
TypeError: ...

And prepare it for serialization (via json, msgpack, ..):

>>> obj.serialize()
{
    'first_name': 'Hello',
	'last_name': '',
	'age': 20,
}