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2024-03-23T09:48:57.664379Z
What's the best way to "raise" a 404 inside a request handler so that it gets picked up by the on-error handler? Should I throw an exception? or return a map? Code looks roughly like
(fn detail-view [ent-id]
(let [ent (get-from-db ent-id)]
....))(fn detail-view [ent-id]
(let [ent (get-or-404 ent-id)]
...))(fn detail-view [ent-id]
(if-let [ent-id (get-from-id ent-id)]
(do stuff)
{:error 404}) 2024-03-24T10:09:41.656959Z
Ok thanks!
2024-03-24T00:49:52.210529Z
You can return a map with :status 404, like
(defn detail-view [ent-id]
(if-let [ent (get-from-id ent-id)]
(do-stuff ent)
{:status 404
:headers {"content-type" "text/plain"}
:body "Not found"})) 2024-03-24T04:03:51.295769Z
actually I'm not 100% sure that'll trigger the on-error handler--it might only get triggered by reitit E.g. if the client requests a route that doesn't even exist. either way, if you're in a situation where you're returning a :status 404 or some other error, you can just call the on-error handler directly and use that as your ring response.