RAP show messages in popup

[felix_grab]

Hello,

I am trying to create a clean core RAP application, which is changing data from purchase orders. Since the business objects are not released for use in private cloud scenarios, but only for the public cloud, I am relying on the old Bapis. These Bapi calls are wrapped in a tier 2 software component and are called in testmode inside of the transactional phase and without testrun in the save phase.

Since we offer a function to change the data for multiple rows at the same time, the error messages which are shown in the default error message popup are not really helpful. This is because the error message popup has no connection between the error messages from the Bapi and which line of my list report is causing the problem.

Therefore I already created an own message database table, in which I am storing the return information of the Bapis together with the keys of my list report. My list report information is also already connected to the messages using associations in my CDS views. And using an additional CDS view I am already calculating the worst return message, which is available for my list report row. So I could already create a field, which is showing this as a processing icon:

The only thing what is missing is, that I want to click on the icon and want to display all the messages for the corresponding row. So basically showing all data using an assocation in a popup. Currently I have no idea how to do this only using metadata extensions. Does somebody have an idea how this is possible?

Greetings

Felix