Add tags when exception occurs

SDKs
1

It would be convenient to collect additional information and add it to the reported event when exception occurs. I found a solution here: https://github.com/getsentry/sentry-javascript/issues/2219

I tried to add this code to beforeSend:

    beforeSend(event, hint) {
      event.tags = event.tags || {};
      event.tags['stateUrl'] = getStateUrl();
      return event;
    }

But tag does not show in “Tags” tab of the event. How should I do that?

2

Hi! Is this a difficult question or noone needs this?

3

From looking at your code I can’t tell why the tag was not added.
If that function is assigned to the beforeSend call back, it should add the value.

Did you walk through with a debugger to make sure it’s invoked?

4

Thanks for your answer! Yes, I added console.log to see that event.tags[‘stateUrl’] was successfully changed:

Sentry.init({
dsn: ‘https://…’,
beforeSend(event, hint) {
event.tags = event.tags || {};
event.tags[‘stateUrl’] = getStateUrl();
console.log(event.tags[‘stateUrl’]);
return event;
}
});

Error is reported, but there is no custom tag on Tags tab. Maybe I am looking in the wrong place?
https://sentry.io/share/issue/4eaf7fdaaf35499e9f5f1558935782cf/

5

Hi! I found out that maximum length of tag is 200, but I am trying to pass state of my application, which is 300-1000 long if base64 encoded.

So I tried to try to pass information through breadcrumbs. I tried two ways: logging to console and addBreadcrumb, but none of them appears in resulting breadcrumbs. What is the correct way to pass state in event?

  Sentry.init({
    dsn: 'https://xxx@sentry.io/xxx',
    beforeSend(event, hint) {
        Sentry.addBreadcrumb({
          category: 'state',
          message: urlNoParams() + '?state=' + state2url(),
          level: Sentry.Severity.Info
        });
        console.error('State url:', urlNoParams() + '?state=' + state2url());
        return event;
    }
  });