How to add custom validation to ensure unique value for one of the childView's Properties in custom plugin?

Question

I have a custom plugin which has a table with rows. I have Add button to add a row. While adding I want to ensure uniqueness of a property value. By default childView.Properties.Add has IsRequired = false/true but there is nothing to check if the value is unique.

Please can someone help me on this?

Answer 1

The following link helped me. https://websterian.com/2018/10/10/sitecore-commerce-adding-an-entirely-new-entity-part-1-commerce-engine-and-business-tools/

Have a look at validationError in DoActionAddBrandBlock.cs.