Hello everyone, I want to ask you something about our project.
Inside our project , to register a person to an activity, we collect the id of that person and the id of the activity he participated in. However, when doing this, I want to show a warning message to end users if this participant has previously participated in an activity with the same activityid . Or how many times has this Id repeated inside this form? is it possible? Please also find a picture froım our participation form attached.