Fix issue where message is lost when logging hashes with multiple IO devices

Author: olivier-thatch

lib/logtail/logger.rb

@@ -41,11 +41,13 @@ def build_log_entry(severity, time, progname, logged_obj)
                          tags: tags)
           elsif logged_obj.is_a?(Hash)
             # Extract the tags
-            tags.push(logged_obj.delete(:tag)) if logged_obj.key?(:tag)
-            tags.concat(logged_obj.delete(:tags)) if logged_obj.key?(:tags)
+            tags.push(logged_obj[:tag]) if logged_obj.key?(:tag)
+            tags.concat(logged_obj[:tags]) if logged_obj.key?(:tags)
             tags.uniq!
 
-            message = logged_obj.delete(:message)
+            message = logged_obj[:message]
+
+            logged_obj = logged_obj.select { |k, _| ![:message, :tag, :tags].include?(k) }
 
             LogEntry.new(level, time, progname, message, context_snapshot, logged_obj, tags: tags)
           else

spec/logtail/logger_spec.rb

@@ -78,6 +78,16 @@
       expect(io.string).to eq("")
     end
 
+    it "should not lose message when logging hashes with multiple io devices" do
+      io1 = StringIO.new
+      io2 = StringIO.new
+      logger = Logtail::Logger.new(io1, io2)
+      message = {message: "payment rejected", payment_rejected: {customer_id: "abcde1234", amount: 100}}
+      logger.info(message)
+      expect(io1.string).to include("payment rejected")
+      expect(io2.string).to include("payment rejected")
+    end
+
     context "with the AugmentedFormatter" do
       before(:each) { logger.formatter = Logtail::Logger::AugmentedFormatter.new }