How to keep the field value in the forms for one week

Question

I have an application that when the user logs on to it , it shows all the documents that are in the current dept.
the form has the following fields:
document no
sent date
assigned to
dep_LOV
and a check box
if a user clicks the check box and assignes the document to another dept by cliking the LOv then the assigned to field should be populated with the new value and the sent date should be today's date(sysdate). the requirment is that once the user assignes the documnet to certain depts (for example sales dept) the assigned to field and the sent date should show up in the form for one week and the user should be able to see that data in the form the next time she /he logs onto the application. the one week time is to make sure the documcnt has reached the assigned dept. after one week from today's date the updated assigned_to field and the document no should not display on the form. During the one week if the user logs on to the form again that particular document and the assigned to and sent to fields shoould be grayed out and shhould not be updatable. I will greatly appreciate any suggetion as of what to do to solve this problem. it is urgent. Pleade help

Answer 1

-> so you are saying that I should have a block level post_query trigger and put the where clause in it?
No. Post-query trigger runs AFTER the query has been executed, and it runs once for each row fetched. It is for other purposes, NOT for setting a where clause.
-> Plus i want to be able to gray out the field once populated with the sales dept.I have come up with the following code:
Your Set_item_instance_property is almost correct. And THAT line would go into the Post-Query trigger. This is what you might use:
<pre><font face = "Lucida Console, Courier New, Courier, Fixed" size = "1" color = "navy"> Set_item_instance_property ('docs.assigned_to',:system.trigger_record, Enabled,Property_False);</font></pre>
Please watch your use of underscore, dashes, commas and parentheses: _ - , ( )
The way to set your default where clause would be the following, and you should do it in the key-exeqry trigger, or someplace similar:
<pre><font face = "Lucida Console, Courier New, Courier, Fixed" size = "1" color = "navy"> set_block_property('DOCS', default_where,
'NVL(sent_date,sysdate) >= sysdate-7' );
Go_block('DOCS');
Execute_Query;</font></pre>
I used the NVL function so your select will show rows where sent_date is null OR sent_date has a value that is within 7 days prior to the current date.
What is the field :docs.assigned_to used for? If you want to include ONLY rows that are assigned to a particular person, then your where clause might be:
<pre><font face = "Lucida Console, Courier New, Courier, Fixed" size = "1" color = "navy"> 'assigned_to = :ctrl.assigned_to and NVL(sent_date,sysdate) >= sysdate-7' </font></pre>
and you should have a control block with the assigned_to field in it, where the user can enter a value before querying the DOCS block.