Class: ActiveRecord::Associations::Builder::CollectionAssociation

Inherits:
Association show all
Defined in:
activerecord/lib/active_record/associations/builder/collection_association.rb

Overview

:nodoc:

Direct Known Subclasses

HasMany

Constant Summary collapse

CALLBACKS =
[:before_add, :after_add, :before_remove, :after_remove]

Constants inherited from Association

Association::VALID_OPTIONS

Class Method Summary collapse

Methods inherited from Association

add_destroy_callbacks, build, build_scope, check_dependent_options, create_reflection, define_accessors, define_validations, macro, valid_dependent_options, validate_options

Class Method Details

.define_callback(model, callback_name, name, options) ⇒ Object


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# File 'activerecord/lib/active_record/associations/builder/collection_association.rb', line 32

def self.define_callback(model, callback_name, name, options)
  full_callback_name = "#{callback_name}_for_#{name}"

  # TODO : why do i need method_defined? I think its because of the inheritance chain
  model.class_attribute full_callback_name unless model.method_defined?(full_callback_name)
  callbacks = Array(options[callback_name.to_sym]).map do |callback|
    case callback
    when Symbol
      ->(method, owner, record) { owner.send(callback, record) }
    when Proc
      ->(method, owner, record) { callback.call(owner, record) }
    else
      ->(method, owner, record) { callback.send(method, owner, record) }
    end
  end
  model.send "#{full_callback_name}=", callbacks
end

.define_callbacks(model, reflection) ⇒ Object


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# File 'activerecord/lib/active_record/associations/builder/collection_association.rb', line 15

def self.define_callbacks(model, reflection)
  super
  name    = reflection.name
  options = reflection.options
  CALLBACKS.each { |callback_name|
    define_callback(model, callback_name, name, options)
  }
end

.define_extensions(model, name) ⇒ Object


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# File 'activerecord/lib/active_record/associations/builder/collection_association.rb', line 24

def self.define_extensions(model, name)
  if block_given?
    extension_module_name = "#{model.name.demodulize}#{name.to_s.camelize}AssociationExtension"
    extension = Module.new(&Proc.new)
    model.parent.const_set(extension_module_name, extension)
  end
end

.define_readers(mixin, name) ⇒ Object

Defines the setter and getter methods for the collection_singular_ids.


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# File 'activerecord/lib/active_record/associations/builder/collection_association.rb', line 51

def self.define_readers(mixin, name)
  super

  mixin.class_eval <<-CODE, __FILE__, __LINE__ + 1
    def #{name.to_s.singularize}_ids
      association(:#{name}).ids_reader
    end
  CODE
end

.define_writers(mixin, name) ⇒ Object


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# File 'activerecord/lib/active_record/associations/builder/collection_association.rb', line 61

def self.define_writers(mixin, name)
  super

  mixin.class_eval <<-CODE, __FILE__, __LINE__ + 1
    def #{name.to_s.singularize}_ids=(ids)
      association(:#{name}).ids_writer(ids)
    end
  CODE
end

.valid_options(options) ⇒ Object


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# File 'activerecord/lib/active_record/associations/builder/collection_association.rb', line 10

def self.valid_options(options)
  super + [:table_name, :before_add,
           :after_add, :before_remove, :after_remove, :extend]
end

.wrap_scope(scope, mod) ⇒ Object


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# File 'activerecord/lib/active_record/associations/builder/collection_association.rb', line 71

def self.wrap_scope(scope, mod)
  if scope
    if scope.arity > 0
      proc { |owner| instance_exec(owner, &scope).extending(mod) }
    else
      proc { instance_exec(&scope).extending(mod) }
    end
  else
    proc { extending(mod) }
  end
end