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.

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