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module ActiveRecord::Associations::Builder
class CollectionAssociation < Association #:nodoc:
CALLBACKS = [:before_add, :after_add, :before_remove, :after_remove]
self.valid_options += [
:table_name, :order, :group, :having, :limit, :offset, :uniq, :finder_sql,
:counter_sql, :before_add, :after_add, :before_remove, :after_remove
]
attr_reader :block_extension
def self.build(model, name, options, &extension)
new(model, name, options, &extension).build
end
def initialize(model, name, options, &extension)
super(model, name, options)
@block_extension = extension
end
def build
wrap_block_extension
reflection = super
CALLBACKS.each { |callback_name| define_callback(callback_name) }
reflection
end
def writable?
true
end
private
def wrap_block_extension
options[:extend] = Array.wrap(options[:extend])
if block_extension
silence_warnings do
model.parent.const_set(extension_module_name, Module.new(&block_extension))
end
options[:extend].push("#{model.parent}::#{extension_module_name}".constantize)
end
end
def extension_module_name
@extension_module_name ||= "#{model.to_s.demodulize}#{name.to_s.camelize}AssociationExtension"
end
def define_callback(callback_name)
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.to_sym unless model.method_defined?(full_callback_name)
model.send("#{full_callback_name}=", Array.wrap(options[callback_name.to_sym]))
end
def define_readers
super
name = self.name
mixin.redefine_method("#{name.to_s.singularize}_ids") do
association(name).ids_reader
end
end
def define_writers
super
name = self.name
mixin.redefine_method("#{name.to_s.singularize}_ids=") do |ids|
association(name).ids_writer(ids)
end
end
end
end
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