We have custom workspace created and implemented one of the functionality similar to OOB Group and Group members. (Custom tables - Bid Group and Bid Group members). Whenever we try to add bid group members into bid group using edit button, we have Business rule on insert into the bid group members to validate that participant is part of any other bid group and abort the insert operation. But we have to display one single message for all errors, eg., if admin tries to add 4 members and out of 4, 3 are failed in validation.it should populate only one aggregate error message in the banner.
Please help me out to implement aggregated error message. Thanks in advance
