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Apex Callout
Since apex callouts are asynchronous, can I have a trigger that will prevent a record from being saved if the return value of the callout meets a certain criteria?
An example being:
When a record is being saved, the trigger calls out to a web service using the value in one of the fields on that record. If the web service returns 0 I want the record to not be allowed to be saved. If the record returns a 1 I want the record to be saved.
Anyone have experience with matters such as this?
Hey Rs,
You can write a trigger and do the call in loop like
//Do your callout
//Check for result here
if(Account tr : Trigger.new) {
//condition satisfies
insert tr;
else {
//Here adding error message when condition matches using label
tr.addError(label.AccountTriggerErrorMessage);
}
You can create an error message for the trigger on detail page using custom labels
Here is the link too
http://abhithetechknight.blogspot.in/2013/09/custom-error-message-on-standard-edit.html
Abhi,
I appreciate your response. I am a little confused though. From what I have been researching, all callouts are annotated with @future which means that the callout method will run after the trigger has long finished. Otherwise, the record save would be held up waiting for the response from the service.