Merge pull request #13355 from dylanahsmith/migration-version

activerecord: Initialize Migration with version from MigrationProxy.

Conflicts:
	activerecord/CHANGELOG.md

activerecord/CHANGELOG.md

@@ -1,7 +1,13 @@
+*   Initialize version on Migration objects so that it can be used in a migration,
+    and it will be included in the announce message.
+
+    *Dylan Thacker-Smith*
+
 *   `change_table` now uses the current adapter's `update_table_definition`
     method to retrieve a specific table definition.
     This ensures that `change_table` and `create_table` will use
     similar objects.
+
     Fixes #13577 and #13503.
 
     *Nishant Modak*, *Prathamesh Sonpatki*, *Rafael Mendonça França*

activerecord/lib/active_record/migration.rb

@@ -759,7 +759,7 @@ def migration
 
       def load_migration
         require(File.expand_path(filename))
-        name.constantize.new
+        name.constantize.new(name, version)
       end
 
   end

activerecord/test/cases/migration_test.rb

@@ -79,6 +79,10 @@ def test_migrator_versions
     ActiveRecord::Migrator.migrations_paths = old_path
   end
 
+  def test_migration_version
+    ActiveRecord::Migrator.run(:up, MIGRATIONS_ROOT + "/version_check", 20131219224947)
+  end
+
   def test_create_table_with_force_true_does_not_drop_nonexisting_table
     if Person.connection.table_exists?(:testings2)
       Person.connection.drop_table :testings2

activerecord/test/migrations/version_check/20131219224947_migration_version_check.rb

@@ -0,0 +1,8 @@
+class MigrationVersionCheck < ActiveRecord::Migration
+  def self.up
+    raise "incorrect migration version" unless version == 20131219224947
+  end
+
+  def self.down
+  end
+end