How to display the error messages while doing a preview quote in a custom page

[doyeli]

Problem:

We need help in capturing the error messages thrown by Avatax while doing a preview quote. We have extended zqu.QuotePreviewController to customise the preview quote page but we were unable to notify the users in case if there are any errors. Basically, we are trying to achieve the same thing as in Quote detail page.

[doyeli · Accepted solution]

Solution:

Customer had the following custom method in their custom class :

public void previewQuoteBillingResult(){

// Force the quote to recalculate to get the quote metrics

try {

zqu.zQuoteUtil.ZBillingResult previewResult = zqu.QuoteRecalculateController.JR_recalculate(quote.Id);

} catch (Exception ex) {

  appendErrorMessage(ex.getMessage());

}

}

The reason the previewQuote error was not getting displayed because customer was trying to catch an exception instead of looking into the result directly. It was required to capture the message from previewResult and display it on the custom page

The problem was resolved by updating the code like below:

public void previewQuoteBillingResult(){
// Force the quote to recalculate to get the quote metrics
zqu.zQuoteUtil.ZBillingResult previewResult = zqu.QuoteRecalculateController.JR_recalculate(quote.Id);
if(String.isNotEmpty(previewResult.message)){
appendErrorMessage(previewResult.message);
}
}