lib/rom/sql/association/many_to_many.rb in rom-sql-1.0.0.rc1 vs lib/rom/sql/association/many_to_many.rb in rom-sql-1.0.0.rc2

@@ -62,12 +62,17 @@
 
         # @api private
         def associate(relations, children, parent)
           ((spk, sfk), (tfk, tpk)) = join_key_map(relations)
 
-          children.map { |tuple|
-            { sfk => tuple.fetch(spk), tfk => parent.fetch(tpk) }
-          }
+          case parent
+          when Array
+            parent.map { |p| associate(relations, children, p) }.flatten(1)
+          else
+            children.map { |tuple|
+              { sfk => tuple.fetch(spk), tfk => parent.fetch(tpk) }
+            }
+          end
         end
 
         # @api private
         def join_relation(relations)
           relations[through.relation]