Validation after onBeforeUpdate()

[GerhardLiebenberg]

EditableSaver validates the attribute before beforeUpdate() is performed.

After beforeUpdate() was performed, EditableSaver only checks for new errors, without first performing any validation again.

This means that new errors introduced via code in beforeUpdate() are not discovered, unless the beforeUpdate() function explicitly performs $editSaver->model->validate() at the end.

If this is the desired functionality, then maybe this point should just be stressed in the documentation.