Class: ROM::Transformer

Inherits:

Object

• Object
• ROM::Transformer

Extended by:

Plugins::ClassMethods

Defined in:

lib/rom/transformer.rb

Overview

Transformer is a data mapper which uses `Dry::Transformer`'s DSL to define transformations.

Class Method Summary

• .build ⇒ Transformer

  Build a mapper instance.

• .map(&block) ⇒ self

  Define transformation pipeline.

Methods included from Plugins::ClassMethods

plugins, use

Class Method Details

.build ⇒ Transformer

Build a mapper instance

Returns:

• (Transformer)

# File 'lib/rom/transformer.rb', line 42

def self.build
  new
end

.map(&block) ⇒ self

Define transformation pipeline

Examples:

class UsersMapper < ROM::Transformer
  map do
    rename_keys user_id: :id
    deep_stringify_keys
  end
end

Returns:

• (self)

# File 'lib/rom/transformer.rb', line 31

def self.map(&block)
  define! do
    map_array(&block)
  end
end