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Class: ActiveModel::Validations::AcceptanceValidator::LazilyDefineAttributes

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::Module
Instance Chain:
Inherits: Module
  • ::Object
Defined in: activemodel/lib/active_model/validations/acceptance.rb

Constant Summary

::Module - Inherited

DELEGATION_RESERVED_KEYWORDS, DELEGATION_RESERVED_METHOD_NAMES, RUBY_RESERVED_KEYWORDS

Class Attribute Summary

Class Method Summary

Instance Attribute Summary

::Module - Inherited

#anonymous?

A module may or may not have a name.

Instance Method Summary

::Module - Inherited

#alias_attribute

Allows you to make aliases for attributes, which includes getter, setter, and a predicate.

#attr_internal
#attr_internal_accessor

Declares an attribute reader and writer backed by an internally-named instance variable.

#attr_internal_reader

Declares an attribute reader backed by an internally-named instance variable.

#attr_internal_writer

Declares an attribute writer backed by an internally-named instance variable.

#cattr_accessor
#cattr_reader
#cattr_writer
#delegate

Provides a delegate class method to easily expose contained objects’ public methods as your own.

#delegate_missing_to

When building decorators, a common pattern may emerge:

#deprecate

deprecate :foo.

#mattr_accessor

Defines both class and instance accessors for class attributes.

#mattr_reader

Defines a class attribute and creates a class and instance reader methods.

#mattr_writer

Defines a class attribute and creates a class and instance writer methods to allow assignment to the attribute.

#module_parent

Returns the module which contains this one according to its name.

#module_parent_name

Returns the name of the module containing this one.

#module_parents

Returns all the parents of this module according to its name, ordered from nested outwards.

#redefine_method

Replaces the existing method definition, if there is one, with the passed block as its body.

#redefine_singleton_method

Replaces the existing singleton method definition, if there is one, with the passed block as its body.

#remove_possible_method

Removes the named method, if it exists.

#remove_possible_singleton_method

Removes the named singleton method, if it exists.

#silence_redefinition_of_method

Marks the named method as intended to be redefined, if it exists.

#thread_cattr_accessor
#thread_cattr_reader
#thread_cattr_writer
#thread_mattr_accessor

Defines both class and instance accessors for class attributes.

::Module::Concerning - Included

#concern

A low-cruft shortcut to define a concern.

#concerning

Define a new concern and mix it in.

Constructor Details

.new(attributes) ⇒ LazilyDefineAttributes

[ GitHub ]

  
# File 'activemodel/lib/active_model/validations/acceptance.rb', line 28

def initialize(attributes)
  @attributes = attributes.map(&:to_s)
end

Instance Method Details

#==(other)

[ GitHub ]

  
# File 'activemodel/lib/active_model/validations/acceptance.rb', line 73

def ==(other)
  self.class == other.class && attributes == other.attributes
end

#define_on(klass)

[ GitHub ]

  
# File 'activemodel/lib/active_model/validations/acceptance.rb', line 56

def define_on(klass)
  @lock&.synchronize do
    return unless @lock

    attr_readers = attributes.reject { |name| klass.attribute_method?(name) }
    attr_writers = attributes.reject { |name| klass.attribute_method?("#{name}=") }

    attr_reader(*attr_readers)
    attr_writer(*attr_writers)

    remove_method :respond_to_missing?
    remove_method :method_missing

    @lock = nil
  end
end

#included(klass)

[ GitHub ]

  
# File 'activemodel/lib/active_model/validations/acceptance.rb', line 32

def included(klass)
  @lock = Mutex.new
  mod = self

  define_method(:respond_to_missing?) do |method_name, include_private = false|
    mod.define_on(klass)
    super(method_name, include_private) || mod.matches?(method_name)
  end

  define_method(:method_missing) do |method_name, *args, &block|
    mod.define_on(klass)
    if mod.matches?(method_name)
      send(method_name, *args, &block)
    else
      super(method_name, *args, &block)
    end
  end
end

#matches?(method_name) ⇒ Boolean

[ GitHub ]

  
# File 'activemodel/lib/active_model/validations/acceptance.rb', line 51

def matches?(method_name)
  attr_name = method_name.to_s.chomp("=")
  attributes.any? { |name| name == attr_name }
end