Convert Fixnum into String the port number in MySQL

activerecord/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   `rake db:structure:dump` no longer crashes when the port was specified as `Fixnum`.
+
+    *Kenta Okamoto*
+
 *   `NullRelation#pluck` takes a list of columns
 
     The method signature in `NullRelation` was updated to mimic that in

activerecord/lib/active_record/tasks/mysql_database_tasks.rb

@@ -134,8 +134,9 @@ def prepare_command_options(command)
         args << "--password=#{configuration['password']}"  if configuration['password']
         args.concat(['--default-character-set', configuration['encoding']]) if configuration['encoding']
         configuration.slice('host', 'port', 'socket').each do |k, v|
-          args.concat([ "--#{k}", v ]) if v
+          args.concat([ "--#{k}", v.to_s ]) if v
         end
+
         args
       end
     end

activerecord/test/cases/tasks/mysql_rake_test.rb

@@ -280,6 +280,15 @@ def test_warn_when_external_structure_dump_fails
 
       assert_match(/Could not dump the database structure/, warnings)
     end
+
+    def test_structure_dump_with_port_number
+      filename = "awesome-file.sql"
+      Kernel.expects(:system).with("mysqldump", "--port", "10000", "--result-file", filename, "--no-data", "test-db").returns(true)
+
+      ActiveRecord::Tasks::DatabaseTasks.structure_dump(
+        @configuration.merge('port' => 10000),
+        filename)
+    end
   end
 
   class MySQLStructureLoadTest < ActiveRecord::TestCase