August 16, 2022

Video for lesson 20 of OpenXava course

This new lesson is also about validations. The validations we have seen until now are processed when the entity is modified, but sometimes it's useful or it's required to process the validation before the removal of the entity, and to use the validation to cancel the entity removal.
We are going to modify the application to reject the removal of an order if it has an invoice associated. 
Watch the video.

Video for lesson 20: Validation on remove

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