- Now field validators must be callable objects. Before that validators had a validate method that is not longer used to perform a validation.
- Fields default callables can now optionally receive the model as argument
- Added the inspection module which provides the inspect function that can be used to access the public api of models.Model instances and classes.
- Moved the Model.to_dict functionality to dict(model).
- The Model.validation_errors method now is an interable of field name and validaton error pairs.
- Removed the Field subfix for all Booby fields. Now use the module as namespace: fields.String.
- Added an is_valid property to Model.
- The Model instances now are iterables of field name, value pairs.
- When passed a callable object as a field default then the default value for this field in a model instance will be the return value of the given callable.
- Added the :func:`models.Model.validation_errors` method to get a dict of field name and error message pairs for all invalid model fields.