Holds common methods for migrations. It assumes that migrations has the [0-9]*_name format and can be used by another frameworks (like Sequel) just by implementing the next migration version method.
Namespace
Methods
Attributes
[R] | migration_class_name | |
[R] | migration_file_name | |
[R] | migration_number |
Instance Public methods
migration_template(source, destination=nil, config={})
Link
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.
migration_template "migration.rb", "db/migrate/add_foo_to_bar.rb"
# File railties/lib/rails/generators/migration.rb, line 41 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}. Use --force to remove the old migration file and replace it." end destination = File.join(migration_dir, "#{@migration_number}_#{@migration_file_name}.rb") end template(source, destination, config) end