形式和强参数识别哈希

Question

我在一个名为 FormsController 的控制器中定义了以下强参数和新方法。用例是用户可以创建一个包含多个字段的表单。

class FormsController < ApplicationController
  def index
      @forms = Form.all
  end

  def new
    @form = Form.new(form_params)
  end

  ...

  private
    def form_params
      params.require(:form).permit(:user, :name, :tag, :link, :repo, :hpx_id, :tmp_id)
    end
end

目前使用以下新视图从用户那里获取一些输入

<div class="form">
  <%= simple_form_for @param do |f| %>
    <div class="form-inputs">
      <%= render "hpx_select", name: "[form]hpx_id", selected: (params[:hpx_id]) %>
    </div>
    <div class="form-inputs";>
      <%= f.input :user %>
      <%= f.input :name %>
      <%= f.input :tag %>
      <%= f.input :link %>
      <%= f.input :repo %>
    </div>
    <div class="form-inputs">
      <%= f.select(:tmp_id, options_for_select(@forms.map{ |t| [t.name, t.id] })) %>
    </div>
    <div class="form-actions">
      <%= f.button :submit, "Create", class: "btn-primary" %>
    </div>
  <% end %>
</div>

当我提交并创建一个新表单时，它会插入：

SQL (6.4ms)  INSERT INTO "forms" ("user", "name", "tag", "link", "repo", "hpx_id", "tmp_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9) RETURNING "id"  [["user", "value1"], ["name", "value2"], ["tag", "value3"], ["link", "value4"], ["repo", "value5"], ["hpx_id", "id1"], ["tmp_id", "id2"], ["created_at", "2020-06-13 20:54:41.366047"], ["updated_at", "2020-06-13 20:54:41.366047"]]

参数哈希，在提交时，看起来像：

{“user”=>”value1”, “name”=>”value2”, “tag”=>”value3”, “link”=>”value4”, “repo”=>”value5”, “hpx_id”=>”id1”, "tmp_id"=>”id2”}

我检查了它为字段检查元素生成的名称：

<input type="text" name="form[user]" id="form_user">

从现在开始，是否可以将任何键或特定的哈希数组归因于表单参数以获得如下输出：

form_params => { 1 => {user: "user1" }, 2 => {user: "user2" }, 3 => {user: "user3" }.. }
form_params => { 1 => {name: "name1" }, 2 => {name: "name2" }, 3 => {name: "name3" }.. }
...

并获得如下名称

<input type="text" name="form[1][user]" id="form_user">

Answer 1

这行是问题，it should look like this

@form = Form.new(form_params)