Class: Dry::Types::Enum

Inherits:
Object
  • Object
show all
Includes:
Decorator, Type
Defined in:
lib/dry/types/enum.rb

Instance Attribute Summary collapse

Attributes included from Decorator

#type

Attributes included from Options

#options

Instance Method Summary collapse

Methods included from Decorator

#constrained?, #decorate?, #default?, #method_missing, #respond_to_missing?, #try, #valid?

Methods included from Options

#meta, #pristine, #with

Constructor Details

#initialize(type, options) ⇒ Enum

Returns a new instance of Enum.

Parameters:

Options Hash (options):



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# File 'lib/dry/types/enum.rb', line 19

def initialize(type, options)
  super
  @values = options.fetch(:values).freeze
  @values.each(&:freeze)
  @mapping = values.each_with_object({}) { |v, h| h[values.index(v)] = v }.freeze
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Dry::Types::Decorator

Instance Attribute Details

#mapping ⇒ Hash (readonly)

Returns:



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# File 'lib/dry/types/enum.rb', line 14

def mapping
  @mapping
end

#values ⇒ Array (readonly)

Returns:



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# File 'lib/dry/types/enum.rb', line 11

def values
  @values
end

Instance Method Details

#call(input) ⇒ Object Also known as: []

Parameters:

  • input (Object)

Returns:

  • (Object) 


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# File 'lib/dry/types/enum.rb', line 28

def call(input)
  value =
    if values.include?(input)
      input
    elsif mapping.key?(input)
      mapping[input]
    end

  type[value || input]
end

#default ⇒ Object 



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# File 'lib/dry/types/enum.rb', line 40

def default(*)
  raise '.enum(*values).default(value) is not supported. Call '\
        '.default(value).enum(*values) instead'
end

#to_ast(meta: true) ⇒ Object

See Also:



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# File 'lib/dry/types/enum.rb', line 48

def to_ast(meta: true)
  [:enum, [type.to_ast(meta: meta), meta ? self.meta : EMPTY_HASH]]
end