# File lib/dm-core/associations/one_to_one.rb, line 9
      def self.setup(name, model, options = {})
        assert_kind_of 'name',    name,    Symbol
        assert_kind_of 'model',   model,   Model
        assert_kind_of 'options', options, Hash

        repository_name = model.repository.name

        model.class_eval "def \#{name}\n\#{name}_association.first\nend\n\ndef \#{name}=(child_resource)\n\#{name}_association.replace(child_resource.nil? ? [] : [ child_resource ])\nend\n\nprivate\n\ndef \#{name}_association\n@\#{name}_association ||= begin\nunless relationship = model.relationships(\#{repository_name.inspect})[:\#{name}]\nraise ArgumentError, \"Relationship \#{name.inspect} does not exist in \\\#{model}\"\nend\nassociation = Associations::OneToMany::Proxy.new(relationship, self)\nparent_associations << association\nassociation\nend\nend\n", __FILE__, __LINE__

        model.relationships(repository_name)[name] = if options.has_key?(:through)
          RelationshipChain.new(
            :child_model              => options.fetch(:class_name, Extlib::Inflection.classify(name)),
            :parent_model             => model,
            :repository_name          => repository_name,
            :near_relationship_name   => options[:through],
            :remote_relationship_name => options.fetch(:remote_name, name),
            :parent_key               => options[:parent_key],
            :child_key                => options[:child_key]
          )
        else
          Relationship.new(
            name,
            repository_name,
            options.fetch(:class_name, Extlib::Inflection.classify(name)),
            model,
            options
          )
        end
      end