Populate Form Field from Post-Query Trigger

Question

I have a form with some fields like "start_date", "company_id", "previous_start_date", "previous_company_id". Out of these, the "previous" fields are unbound and the others are bound to "my_companies" table. All are in the same block on the form. I have a post-query trigger which runs a cursor to select "previous" values based on the "start_date" and "company_id". More than one "previous" values is retrieved each time. My problem is that my cursor writes back only one value into my form field. I ran the cursor as a pl/sql block in TOAD to test and it fetches all the records that I need. I'm not sure what I'm doing wrong in writing the values into form items. The form items are of type "custom" and display type is "text" (I'm creating the form in Oracle Designer). My cursor code is something like this:
declare
cursor previous_data_cur is 
        select company_id,start_date
           from my_companies
           where company_id = :myblock.company_id
           and start_date < :myblock.start_date;       
BEGIN 
    open previous_data_cur;
    LOOP
    fetch previous_data_cur into :myblock.prev_company_id, :myblock.prev_start_date;
    EXIT WHEN previous_data_cur%NOTFOUND;
    END LOOP;
    close previous_data_cur; 
END; Can anyone provide any pointers on what I could be doing wrong or what I should do to make this work?
Any help is greatly appreciated.

Answer 1

Do you have several previous date fields per record?
How are they named? Previous_date_1, previous_date_2,...?
Try this:
declare
cursor previous_data_cur is 
        select start_date
           from my_companies
           where company_id = :myblock.company_id
           and start_date < :myblock.start_date;
   l_previous_data previous_data_cur%ROWTYPE;       
   l_count NUMBER;
BEGIN 
   l_count := 1
   FOR l_previous_data IN previous_data_cur
   LOOP
       copy(l_previous_data.start_date, 'my_block.previous_start_date_'|| l_count);
    END LOOP;
END; Caution:
- number of retrieved records may not exceed number of previous_date fields.
- not tested