ActiveRecord::Migrator#run records version-state after migrating. [#369 state:resolved]

activerecord/CHANGELOG

@@ -1,5 +1,7 @@
 *Edge*
 
+* db:migrate:down and :up update schema_migrations.  #369 [Michael Raidel, RaceCondition]
+
 * PostgreSQL: support :conditions => [':foo::integer', { :foo => 1 }] without treating the ::integer typecast as a bind variable.  [Tarmo Tänav]
 
 * MySQL: rename_column preserves column defaults.  #466 [Diego Algorta]

activerecord/lib/active_record/migration.rb

@@ -399,7 +399,10 @@ module ActiveRecord
     def run
       target = migrations.detect { |m| m.version == @target_version }
       raise UnknownMigrationVersionError.new(@target_version) if target.nil?
-      target.migrate(@direction)
+      unless (up? && migrated.include?(target.version.to_i)) || (down? && !migrated.include?(target.version.to_i))
+        target.migrate(@direction)
+        record_version_state_after_migrating(target.version)
+      end
     end
 
     def migrate

activerecord/test/cases/migration_test.rb

@@ -825,6 +825,21 @@ if ActiveRecord::Base.connection.supports_migrations?
       assert !Reminder.table_exists?
     end
 
+    def test_migrator_double_up
+      assert_equal(0, ActiveRecord::Migrator.current_version)
+      ActiveRecord::Migrator.run(:up, MIGRATIONS_ROOT + "/valid", 1)
+      assert_nothing_raised { ActiveRecord::Migrator.run(:up, MIGRATIONS_ROOT + "/valid", 1) }
+      assert_equal(1, ActiveRecord::Migrator.current_version)
+    end
+
+    def test_migrator_double_down
+      assert_equal(0, ActiveRecord::Migrator.current_version)
+      ActiveRecord::Migrator.run(:up, MIGRATIONS_ROOT + "/valid", 1)
+      ActiveRecord::Migrator.run(:down, MIGRATIONS_ROOT + "/valid", 1)
+      assert_nothing_raised { ActiveRecord::Migrator.run(:down, MIGRATIONS_ROOT + "/valid", 1) }
+      assert_equal(0, ActiveRecord::Migrator.current_version)
+    end
+
     def test_finds_migrations
       migrations = ActiveRecord::Migrator.new(:up, MIGRATIONS_ROOT + "/valid").migrations
       [['1', 'people_have_last_names'],
@@ -914,16 +929,6 @@ if ActiveRecord::Base.connection.supports_migrations?
       ActiveRecord::Migrator.rollback(MIGRATIONS_ROOT + "/valid")
       assert_equal(0, ActiveRecord::Migrator.current_version)
     end
-    
-    def test_migrator_run
-      assert_equal(0, ActiveRecord::Migrator.current_version)
-      ActiveRecord::Migrator.run(:up, MIGRATIONS_ROOT + "/valid", 3)
-      assert_equal(0, ActiveRecord::Migrator.current_version)
-
-      assert_equal(0, ActiveRecord::Migrator.current_version)
-      ActiveRecord::Migrator.run(:down, MIGRATIONS_ROOT + "/valid", 3)
-      assert_equal(0, ActiveRecord::Migrator.current_version)
-    end
 
     def test_schema_migrations_table_name
       ActiveRecord::Base.table_name_prefix = "prefix_"