id_for raises more specific errors when they exist

Author: eizengan

CHANGELOG.md

@@ -1,6 +1,7 @@
 ### 3.1.1 (Next)
 
 * [#581](https://github.com/slack-ruby/slack-ruby-client/pull/581): Migrate Danger to use danger-pr-comment workflow - [@dblock](https://github.com/dblock).
+* [#583](https://github.com/slack-ruby/slack-ruby-client/pull/583): Not found errors raised by id_for use more specific error classes when they exist - [@eizengan](https://github.com/eizengan).
 * Your contribution here.
 
 ### 3.1.0 (2025/11/15)

lib/slack/web/api/mixins/ids.id.rb

@@ -15,7 +15,9 @@ def id_for(key:, name:, prefix:, enum_method:, list_method:, options: {})
               end
             end
 
-            raise Slack::Web::Api::Errors::SlackError, "#{key}_not_found"
+            error_message = "#{key}_not_found"
+            error_class = Slack::Web::Api::Errors::ERROR_CLASSES[error_message] || Slack::Web::Api::Errors::SlackError
+            raise error_class, error_message
           end
         end
       end

spec/slack/web/api/mixins/conversations_spec.rb

@@ -59,7 +59,7 @@
 
     it 'fails with an exception' do
       expect { conversations.conversations_id(channel: '#invalid') }.to(
-        raise_error(Slack::Web::Api::Errors::SlackError, 'channel_not_found')
+        raise_error(Slack::Web::Api::Errors::ChannelNotFound, 'channel_not_found')
       )
     end
 

spec/slack/web/api/mixins/users_spec.rb

@@ -46,7 +46,7 @@
 
     it 'fails with an exception' do
       expect { users.users_id(user: '@foo') }.to(
-        raise_error(Slack::Web::Api::Errors::SlackError, 'user_not_found')
+        raise_error(Slack::Web::Api::Errors::UserNotFound, 'user_not_found')
       )
     end