Idea: Passing lambda to tags_context and extra_context

[gogiel]

It would be nice to have a possibility to pass lambda to tags_context and extra_context to extract some information in runtime.
I think of two scenarios:

• passing lambda that returns Hash instance
• passing lambdas as Hash keys and calling them at runtime

[nateberkopec]

Hmmm, I'm having trouble of thinking of a scenario when this would actually be useful. When would you need to do this?

[phillbaker]

I was going to open an issue similar to this about a month ago, but subscribed to this issue instead 😀.

Just a couple of scenarios: you can attach tags by section of the application (ie customer-facing or admin-facing depending on the controller) or tags by type of error (maybe grouping the errors). Specifically, one common use case we have is grouping all network-related errors and separating them from application-level errors.

[nateberkopec]

Not a lot of action here, so we won't be implementing this. PRs welcome. Somewhat related to #479.

[ndbroadbent]

I just had this idea as well. My code currently runs a SQL query to add information about the user and their organization to the user_context. It would be great if I could set a lambda so that the SQL query only runs when there's actually an error. (Otherwise it runs on every single request.)