Column re-definition with kargs inconsistent in autoload scenario

[guest]

Since r221, it's been disallowed to override columns in autoloaded tables. However, it appears that in the case where a keyword argument is passed to the field definition, the duplicity is not checked, and the expected exception is not thrown.

Originally, I thought it was the key="attribute_name" parameter that was avoiding the exception, but it also appears even primary_key=True will avoid the exception.

A complete example written as a unit test is included with this ticket. In this example, the Person class initializes correctly (when it shouldn't), but the Animal class throws the expected exception.

[guest]

Unit test, modeled after test_autoload.py, demonstrating issue

[ged]

fixed in r268