instance method `migration_template`

Ruby on Rails 3.1.12

Since v3.0.20

Available in: v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

migration_template(source, destination=nil, config={})

Creates a migration template at the given destination. The difference to the default template method is that the migration version is appended to the destination file name.

The migration version, migration file name, migration class name are available as instance variables in the template to be rendered.

Examples

migration_template "migration.rb", "db/migrate/add_foo_to_bar.rb"

Parameters

source req
destination opt = nil
config opt = {}

Source

# File railties/lib/rails/generators/migration.rb, line 45
      def migration_template(source, destination=nil, config={})
        destination = File.expand_path(destination || source, self.destination_root)

        migration_dir = File.dirname(destination)
        @migration_number     = self.class.next_migration_number(migration_dir)
        @migration_file_name  = File.basename(destination).sub(/\.rb$/, '')
        @migration_class_name = @migration_file_name.camelize

        destination = self.class.migration_exists?(migration_dir, @migration_file_name)

        if !(destination && options[:skip]) && behavior == :invoke
          if destination && options.force?
            remove_file(destination)
          elsif destination
            raise Error, "Another migration is already named #{@migration_file_name}: #{destination}"
          end
          destination = File.join(migration_dir, "#{@migration_number}_#{@migration_file_name}.rb")
        end

        template(source, destination, config)
      end

Defined in railties/lib/rails/generators/migration.rb line 45 · View on GitHub · Improve this page · Find usages on GitHub

Defined in Rails::Generators::Migration

Signature

Examples

Parameters