How to make screen aware data change of a json type in postgresql

Support
#1

Hi,
For cuba standard editor, when user click “cancel” and there are value changes of components have db property related , there will be warning that “data not saved”.

I have a json DB type which mapped to String type in the entity, and there are components related to each json key, which controlled by my code.

So when user click “cancel” , and one of the json key components has value changes, screen can’t know this and close without warning.

Is there some simpler way to make screen aware of the changes? I am thinking to add listeners for each components to mark the changes, but seems not smart。 Is there any smart way?

#2

Hi,
For CUBA data context, in order to know that the entity has been modified - you have to invoke setter of some entity’s persistent property. Automatically when UI component’s value changes, or from your code:

entity.setJsonProperty(newValue);

Also in old datasources you were able to mark entity as modified manually:

((DatasourceImplementation) entityDs).modified(entity);

As I see, this method was not implemented in new CUBA 7 API (in DataContext class).