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]

Instance Attribute Summary collapse

Attributes inherited from Association

#name, #options, #scope

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Association

build, #build, create_builder, define_accessors, #macro, valid_dependent_options, #validate_options

Constructor Details

#initialize(model, name, scope, options) ⇒ CollectionAssociation

Returns a new instance of CollectionAssociation.



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# File 'activerecord/lib/active_record/associations/builder/collection_association.rb', line 17

def initialize(model, name, scope, options)
  super
  @mod = nil
  if block_given?
    @mod = Module.new(&Proc.new)
    @scope = wrap_scope @scope, @mod
  end
end

Instance Attribute Details

#block_extension ⇒ Object (readonly)

Returns the value of attribute block_extension



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

def block_extension
  @block_extension
end

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 42

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 26

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_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 61

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 71

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

Instance Method Details

#define_extensions(model) ⇒ Object 



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# File 'activerecord/lib/active_record/associations/builder/collection_association.rb', line 35

def define_extensions(model)
  if @mod
    extension_module_name = "#{model.name.demodulize}#{name.to_s.camelize}AssociationExtension"
    model.parent.const_set(extension_module_name, @mod)
  end
end

#valid_options ⇒ Object 



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

def valid_options
  super + [:table_name, :before_add,
           :after_add, :before_remove, :after_remove, :extend]
end