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# File 'ext/active_record/associations.rb', line 12
def has_and_belongs_to_many(name, scope = nil, **options, &extension)
habtm_reflection = ActiveRecord::Reflection::HasAndBelongsToManyReflection.new(name, scope, options, self)
builder = Builder::HasAndBelongsToMany.new(name, self, options)
join_model = builder.through_model
const_set(join_model.name, join_model)
private_constant(join_model.name)
middle_reflection = builder.middle_reflection(join_model)
Builder::HasMany.define_callbacks(self, middle_reflection)
Reflection.add_reflection(self, middle_reflection.name, middle_reflection)
middle_reflection.parent_reflection = habtm_reflection
include Module.new {
class_eval <<-RUBY, __FILE__, __LINE__ + 1
def destroy_associations
if !self.sunstone?
association(:#{middle_reflection.name}).delete_all(:delete_all)
association(:#{name}).reset
end
super
end
RUBY
}
hm_options = {}
hm_options[:through] = middle_reflection.name
hm_options[:source] = join_model.right_reflection.name
[:before_add, :after_add, :before_remove, :after_remove, :autosave, :validate, :join_table, :class_name, :extend, :strict_loading, :deprecated].each do |k|
hm_options[k] = options[k] if options.key?(k)
end
has_many name, scope, **hm_options, &extension
_reflections[name].parent_reflection = habtm_reflection
end
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