Create Model with command line

If $cleanValidationRules is true, the validation rules for the field that is not contained in the passed data will be removed before validation.

But it does not seems to work if you don't call validate() by yourself.
If you call insert() or update() or save(), the $cleanValidationRules value will be changed automatically.
I'm not sure this is a bug or not.

Anyway, it is a feature in Model, not in the Validation library.

Yes, i think it is a bug too. I tried and get the same result also. There would be no use to put $cleanValidationRules in model if it gets replaced automatically on calling model insert/update/save. The only way it would works if we capture the validation error on validate() then stop executing next line.
Is there any other workaround?