accept_nested_attributes_for:allow_destroy,:_ destroy无效

Question

我有一个Rails 4.1应用程序,它使用了一些值得注意的技术.

简单形式,茧

我无法销毁嵌套属性的记录.基于一些冗长的研究,我相信我的代码是正确的,但我可能会遗漏一些愚蠢的东西.

模型

has_many :staff_services_joins, :dependent => :destroy
has_many :services, :through => :staff_services_joins
accepts_nested_attributes_for :staff_services_joins, :allow_destroy => true

这有点不正统,但我在连接模型上有两个组件,它们不是外键,需要设置.这就是为什么我接受连接模型的嵌套属性而不是服务模型.

控制器方法

def update
ap staff_params
# if @staff_member.update_with_account staff_params, params[:password]
if @staff_member.update_attributes staff_params
  flash[:notice] = 'Successfully updated staff member! :)'
  redirect_to vendor_store_staff_path current_store, @staff_member
else
  flash[:error] = 'Failed to update staff member :('
  render :edit
end end

参数很强

params.require(:staff).permit(
    :user_id,
    :store_id,
    :avatar,
    :remote_avatar_url,
    :first_name,
    :last_name,
    :email,
    :active,
    :admin,
    :staff_services_joins_attributes => [
        :staff_id,
        :service_id,
        :price,
        :duration,
        :_destroy
    ]
)

示例更新参数hash

{
"store_id" => "2",
"avatar" => "avatar.png",
"remote_avatar_url" => "",
"first_name" => "Joshua",
"last_name" => "Tyree",
"email" => "joshuat@createthebridge.com",
"active" => "0",
"admin" => "1",
"staff_services_joins_attributes" => {
    "0" => {
        "service_id" => "2",
        "price" => "50.00",
        "duration" => "30",
        "_destroy" => "1"
    }
}

}

基于has,这个东西应该是破坏那个模型,但由于某种原因它肯定不是.绝对赞赏任何帮助.

Answer 1

要accepts_nested_attributes_for与强参数一起使用,您需要指定哪些嵌套属性应列入白名单.你做到了,但你错过了添加:id执行删除操作所需的内容."_destroy"key标记了删除记录,但要在内部找到记录并删除,它需要:id存在.

您可以阅读 删除对象指南.