diff options
Diffstat (limited to 'activerecord/lib')
| -rw-r--r-- | activerecord/lib/active_record/migration.rb | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb index 731a350854..fd77f27b77 100644 --- a/activerecord/lib/active_record/migration.rb +++ b/activerecord/lib/active_record/migration.rb @@ -349,6 +349,27 @@ module ActiveRecord end end + # MigrationProxy is used to defer loading of the actual migration classes + # until they are needed + class MigrationProxy + + attr_accessor :name, :version, :filename + + delegate :migrate, :announce, :write, :to=>:migration + + private + + def migration + @migration ||= load_migration + end + + def load_migration + load(filename) + name.constantize + end + + end + class Migrator#:nodoc: class << self def migrate(migrations_path, target_version = nil) @@ -437,7 +458,7 @@ module ActiveRecord runnable.pop if down? && !target.nil? runnable.each do |migration| - Base.logger.info "Migrating to #{migration} (#{migration.version})" + Base.logger.info "Migrating to #{migration.name} (#{migration.version})" # On our way up, we skip migrating the ones we've already migrated # On our way down, we skip reverting the ones we've never migrated @@ -470,11 +491,10 @@ module ActiveRecord raise DuplicateMigrationNameError.new(name.camelize) end - load(file) - - klasses << returning(name.camelize.constantize) do |klass| - class << klass; attr_accessor :version end - klass.version = version + klasses << returning(MigrationProxy.new) do |migration| + migration.name = name.camelize + migration.version = version + migration.filename = file end end |