Question: Usage of add_filter

[janklimo]

We have the following snippet in our initializer:

Airbrake.add_filter do |notice|
  if notice[:context] && notice[:context][:userAgent]
    notice.ignore! if notice[:context][:userAgent].match(/BLEXBot/)
  end
end

However, errors originating from BLEXBot keep appearing in Airbrake. Can you see any problem in the way we use it? Many thanks.

[kyrylo]

There's no need to check for notice[:context] because it's always present. So far I cannot see anything wrong in your snippet. Could you contact our support and link to the error which has this user agent?

[janklimo]

Will do, thank you.

[kyrylo]

Thanks! So what happens is that notice[:context][:userAgent] is always nil in that filter.

I am going to reopen this issue because I consider this to be a bug. Library filters should be added before all user filters, which is not happening as of now.

To workaround the issue, you could craft the following filter:

Airbrake.add_filter do |notice|
  if notice.stash[:rack_request]
    notice.ignore! if notice.stash[:rack_request].user_agent.match(/BLEXBot/)
  end
end