Validation also needs to know if row is checked.

Question

I have a tabular form. It displays a list of product names, and there is a flag as to whether the name is primary or not. Each chemical needs to have exactly one primary name. So I want a validation that will give an error if the user tries to delete the last primary name. So basically I need to count the primary names, and subtract the ones that are checked when the user clicks the delete button. I thought that the following might work, but it goes off even if the user tries to delete a non-primary name.
declare primaryNames number;
begin
primaryNames := 0;
for i in 1.. htmldb_application.G_F05.COUNT loop
     if htmldb_application.G_F05(i) = 1 then
          primaryNames := primaryNames + 1;
     end if;
END LOOP;
for i in 1.. htmldb_application.G_F01.COUNT loop
     if htmldb_application.G_F05(i) = 1 then
          primaryNames := primaryNames - 1;
     end if;
END LOOP;
if  primaryNames < 1 then
     return 'Need at least one primary name.';
end if;
return null;
end;Any suggestions?
3.2

Answer 1

Okay, I got it now. declare primaryNames number;
     v_rowno number;
begin
primaryNames := 0;
for i in 1.. htmldb_application.G_F05.COUNT loop
     if htmldb_application.G_F05(i) = 1 then
          primaryNames := primaryNames + 1;
     end if;
END LOOP;
for i in 1.. htmldb_application.G_F01.COUNT loop
     v_rowno := a;ex_application.g_f01(i);
     if htmldb_application.G_F05(v_rowno) = 1 then
          primaryNames := primaryNames - 1;
     end if;
END LOOP;
if  primaryNames < 1 then
     return 'Need at least one primary name.';
end if;
return null;
end;With help from http://stackoverflow.com/questions/9367759/apex-tabular-form-with-row-selector-how-to-set-value-of-column-in-selected-ro