Ensure that decode returns all parts of composite key

CHANGELOG.md

@@ -1,5 +1,9 @@
 ### Unreleased
 
+* Ensure that decode returns all parts of composite key
+
+### 1.8.0
+
 * Add composite key support #70
 
 ### 1.7.1

lib/prefixed_ids/prefix_id.rb

@@ -25,8 +25,8 @@ def decode(id, fallback: false)
       if !valid?(decoded_hashid)
         fallback_value
       else
-        _, id, *composite = decoded_hashid
-        composite.empty? ? id : composite
+        _, *ids = decoded_hashid
+        ids.size == 1 ? ids.first : ids
       end
     end
 

test/prefixed_ids_test.rb

@@ -239,6 +239,9 @@ class PrefixedIdsTest < ActiveSupport::TestCase
       decoded = hashid.decode(second)
       assert_equal decoded.size, 2
       assert_equal decoded, [1, 1]
+
+      prefix_decoded = prefix.decode(first)
+      assert_equal prefix_decoded, [1, 1]
     end
   end
 end