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sdetweil trigger control, help needed
I am synchronizing a custom object with a remote system. I developed a trigger to do this.
the trigger runs great, and the remote system updates as expected..
changes on the remote side update the record as well.
but.. I need to differentiate between the two systems updating the same object.
to stop trigger recursion.
I have a flag field on the record, and the remote api sets this field to true.
the trigger fires and checks the field.. if set, do NOT send updates.. as we are processing because of inbound updates
changing_object__c c = Trigger.new[i];
if(c.isApi__c==false)
however, when the SF UI changes the record, I DO want to send updates..
how can I tell (before update) which source caused the change?
thanks..
Sam
thank you for kicking me to think about this again.. I had the control right there and missed it..
in the trigger I ask if the control field is checked.. if checked I exit the trigger as these changes are initiated by the remote system.
I didn't think thru that while still IN the trigger, BEFORE the changes are committed, I could change the flag ..
works perfectly.. and I don't need any fancy save intercept..
So the trigger logic that works is
trigger(before update) (remote side does not insert records)
if incoming pending change (in memory) control field checked=false (ui initiated change)
process update and send to remote system
else
set control field checked = false
(object updated on storage occurs here)
Sam
All Answers
There are a couple ways you could do this.
This is probably the easiest.
In SF UI, you could simply override the Save action button with a small VF/Extension. It would manually set the isApi__c = false than perform the normal SAVE DML.
So only the UI SAVE action would be setting the API to false, all other DML operations would remain the same (remoate WS Updates, etc).
thanks.. not much SF UI experience.. I don't see the Save button definition anywhere
and am not sure how to 'override' it..
searching I found saveUrl and retURL and an example
{window.parent.location.href = "{!URLFOR($Action.Problem__c.Edit , Problem__c.Id ,
[saveURL=URLFOR("/apex/testjazzconnect",Problem__c.Id,null,true), retURL=URLFOR($Request.retURL,Problem__c.Id,null, true)] ,true)}"
}
but I get "Invalid target parameter for function URLFOR" in the second URLFOR()
I'm not a browser wizard, and so don't know the context and states where page linking goes on.
sam
and if I take out the retUrl=....
then the button works, and I get the default edit page, and pressing Save takes me to the
first URLFor() target page..
and I can get retURL to work now..
but
1. I don't see how to invoke the default 'save' function.. my page gets called and......??
I wasn't passed the original save button action link.. so???
my thought was I use the passed in object ID to get an object, and set the field I want
(in addition to whatever editing was done, which is invisible to my apex page)
I don't know where those changes are stored(buffered).. I certainly don't have them.
unless retURL is supposed to be set to the original save action.. but I don't know how to get that.
2. if the user direct edits a field, and doesn't push 'edit', then this override doesn't work..
Sam
still need help
Well there is a much easier way. Define a static variable on a class, and set that variable to true in your trigger and check against it. As long as you're within the same transaction scope, that static variable will maintain its value.
thank you for kicking me to think about this again.. I had the control right there and missed it..
in the trigger I ask if the control field is checked.. if checked I exit the trigger as these changes are initiated by the remote system.
I didn't think thru that while still IN the trigger, BEFORE the changes are committed, I could change the flag ..
works perfectly.. and I don't need any fancy save intercept..
So the trigger logic that works is
trigger(before update) (remote side does not insert records)
if incoming pending change (in memory) control field checked=false (ui initiated change)
process update and send to remote system
else
set control field checked = false
(object updated on storage occurs here)
Sam