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alert cancel button gives non oracle exception [message #489968]

Thu, 20 January 2011 06:38

ma04
Messages: 15
Registered: October 2009
Location: swindon, uk

Junior Member

hi gents

i've created an alert with 2 buttons and the code for cancel button is as follows:

...
if alert_id = alert_button2
then
raise form_trigger_failure;
end if;
...

this code is in a pll and when called from a form it displays a non oracle exception message.

any ideas how to do nothing when the user presses cancel on alert pop-up?

apart from using null instead of raising the above exception?

regards

MA

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Re: alert cancel button gives non oracle exception [message #489971 is a reply to message #489968]

Thu, 20 January 2011 07:02

Maaher
Messages: 7065
Registered: December 2001

Senior Member

Why don't you work from the other way:

if show_alert(alert_id) = alert_button1 then
   <do something>
end if;

MHE

[Updated on: Thu, 20 January 2011 07:03]

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Re: alert cancel button gives non oracle exception [message #489972 is a reply to message #489968]

Thu, 20 January 2011 07:03

cookiemonster
Messages: 13963
Registered: September 2008
Location: Rainy Manchester

Senior Member

Is there a problem with using null? That is the standard way of denoting doing nothing.

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Re: alert cancel button gives non oracle exception [message #489974 is a reply to message #489972]

Thu, 20 January 2011 07:15

ma04
Messages: 15
Registered: October 2009
Location: swindon, uk

Junior Member

the sequence of things is :

1. call to library procedure to display alert
2. some other calls to other bd procedures.

if user selects cancel then i don't want the form to anything and stop there hence raising forms_trigger_failure

what happens is that the later code in (2) is executed regardless of which button is pressed.

i only want do (2) if ok is pressed.

it's not feasible to change the library procedure to do something when alert_button1 is pressed.

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Re: alert cancel button gives non oracle exception [message #489975 is a reply to message #489974]

Thu, 20 January 2011 07:26

cookiemonster
Messages: 13963
Registered: September 2008
Location: Rainy Manchester

Senior Member

Forms_trigger_failure causes an error by design. If you want to stop it you either need to catch it with an exception handler or not raise it in the first place.

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Re: alert cancel button gives non oracle exception [message #489978 is a reply to message #489975]

Thu, 20 January 2011 08:01

Maaher
Messages: 7065
Registered: December 2001

Senior Member

So, you've abandoned procedural programming and went for an extra exit point in your procedure? I still stand by my first answer: evaluate the alert return and if it is "alter_button1" then you perform the (2). Exactly like you want it to behave. But if you are reluctant to that approach, have you considered "return"? I'm not a huge fan of it but it does the trick, no?

MHE

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