extending the example for filters in issue #4056
Fixes #3817
Merge pull request #37 from MartinodF/3817-patch

_primary_key_value not set when pk value is supplied (fixes #3817)
checkstyle fixes
checkstyle fixes
Merge branch '3.1/develop' into 3.2/develop
Fixing CS Issues. Uppercase Constants and Logical Operators
Allow custom primary key on User table when logging in
Merge pull request #42 from mvdnes/3.2/develop

Fixes #4222
Store PK if it has been set on a created model, fixes #4244
Update @copyright notices to 2012. Fixes #4396.
Merge branch 3.1/develop into 3.2/develop
Fixes #4406 - Make sure we check for NULL value before loading belongs to data.
The foreign key in the belongs_to relationship is now only set to the value's primary key if the value is an instance of ORM, otherwise the foreign key is set to NULL. Fixes #4420
Fixes #4423 and #4424 - Run validation before checking changed. Always run validation if additional validation is supplied.
Merge branch '3.1/develop' into 3.2/develop
Fixes #4406 - Make sure we check for NULL value before loading belongs to data.
Fixes #3587 - Select columns by name instead of doing select *
Merge branch 3.1/develop into 3.2/develop
handling external validation differently from merged model validation (fixes #4185)