ruby-on-rails - 如何使用 button_to 提交表单？

Question

我需要提交并保存一些数据。我需要表单中的一些帖子 ID:

def message_post_collection_params
    params.require(:message_post).permit(
      { post_ids: [] }
    )
end

如何通过 button_to 获取 ID？我的代码:

button_to('Submit', approve_collection_message_posts_path, params: { message_post: { post_ids: ['1', '2'] } }, data: { config: 'Are you sure?', remote: true })

但是报错:

undefined method `permit' for #<String:0x007ffbdf9f1540>

在线 params.require(:message_post).permit(.

我该如何解决？

Answer 1

我对 Mike K 的回答投反对票的原因是参数声明似乎不是问题所在:

我认为问题在于您如何分配 params在button_to :

button_to 'Submit', approve_collection_message_posts_path, params: { message_post: { post_ids: ['1', '2'] } }, data: { config: 'Are you sure?', remote: true }

通知:<input type="hidden" name="message_post" value="post_ids%5B%5D=1&amp;post_ids%5B%5D=2" />

这就是您收到错误的原因(您的数组中没有嵌套)——您的参数字面上看起来像:"message_post" => "post_ids%5B%5D=1&post_ids%5B%5D=2"

---

修复

有一种便宜的方法可以修复它:

def message_post_collection_params
   params.permit(post_ids:[])
end

= button_to 'Submit',  path_helper, params: { post_ids: ["1","2"] }, data: { config: 'Are you sure?', remote: true }

--

如果你想保留你的嵌套，你可以使用 following comment :

Note that the params option currently don't allow nested hashes. Example: params: {user: {active: false}} is not allowed. You can bypass this using the uglyparams: {:"user[active]" => true}

params: {:"message_post[post_ids]" => ["1","2"]}