module MigrationsHelpers def table(name) Class.new(ActiveRecord::Base) { self.table_name = name } end def migrations_paths ActiveRecord::Migrator.migrations_paths end def table_exists?(name) ActiveRecord::Base.connection.table_exists?(name) end def migrations ActiveRecord::Migrator.migrations(migrations_paths) end def reset_column_in_migration_models ActiveRecord::Base.clear_cache! described_class.constants.sort.each do |name| const = described_class.const_get(name) if const.is_a?(Class) && const < ActiveRecord::Base const.reset_column_information end end end def previous_migration migrations.each_cons(2) do |previous, migration| break previous if migration.name == described_class.name end end def migration_schema_version self.class.metadata[:schema] || previous_migration.version end def schema_migrate_down! disable_migrations_output do ActiveRecord::Migrator.migrate(migrations_paths, migration_schema_version) end reset_column_in_migration_models end def schema_migrate_up! disable_migrations_output do ActiveRecord::Migrator.migrate(migrations_paths) end reset_column_in_migration_models end def disable_migrations_output ActiveRecord::Migration.verbose = false yield ensure ActiveRecord::Migration.verbose = true end def migrate! ActiveRecord::Migrator.up(migrations_paths) do |migration| migration.name == described_class.name end end end