Rails::Generators::Migration (original) (raw)

Holds common methods for migrations. It assumes that migrations have the [0-9]*_name format and can be used by other frameworks (like Sequel) just by implementing the next_migration_number method.

Methods

C

M

S

Attributes

[R] migration_class_name
[R] migration_file_name
[R] migration_number

Instance Public methods

create_migration(destination, data, config = {}, &block)Link

Source: show | on GitHub

def create_migration(destination, data, config = {}, &block) action Rails::Generators::Actions::CreateMigration.new(self, destination, block || data.to_s, config) end

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

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

The migration number, 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"

Source: show | on GitHub

def migration_template(source, destination, config = {}) source = File.expand_path(find_in_source_paths(source.to_s))

set_migration_assigns!(destination)

dir, base = File.split(destination) numbered_destination = File.join(dir, ["%migration_number%", base].join("_"))

file = create_migration numbered_destination, nil, config do ERB.new(::File.binread(source), trim_mode: "-", eoutvar: "@output_buffer").result(binding) end Rails::Generators.add_generated_file(file) end

Source: show | on GitHub

def set_migration_assigns!(destination) destination = File.expand_path(destination, destination_root)

migration_dir = File.dirname(destination) @migration_number = self.class.next_migration_number(migration_dir) @migration_file_name = File.basename(destination, ".rb") @migration_class_name = @migration_file_name.camelize end