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我有一个带有单个模型（任务）和单个属性（名称）的简单应用程序。

应用程序/视图/任务/_form.html.erb

<%= form_tag :action => 'create' %>
<div id="dynamicInput">
          Task Name <input type="text" name="task[name][]">
     </div>
     <input type="button" value="Add New Tag" onClick="addInput('dynamicInput');">
<%= submit_tag "Create"%>

应用程序/资产/javascripts/application.js

var counter = 1;
function addInput(divName){
  var newdiv = document.createElement('div');
  newdiv.innerHTML = "Task Name <input type='text' name='task[name][]'>";
  document.getElementById(divName).appendChild(newdiv);
  counter++;
}

上面的代码允许我添加任意数量的字段。我可以输入一个名称，但如果我动态添加 2 个字段，这就是我的参数的样子......

Started POST "/tasks" for 127.0.0.1 at 2013-07-25 12:36:57 -0400
Processing by TasksController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"PnTQnxM3GFRtqkXi09jLH8UJBiaRCI0chSZ716cVWJ0=", "task"=>{"name"=>["name1", "name2"]}, "commit"=>"Create"}
   (0.1ms)  begin transaction
  SQL (5.6ms)  INSERT INTO "tasks" ("created_at", "name", "updated_at") VALUES (?, ?, ?)  [["created_at", Thu, 25 Jul 2013 16:36:57 UTC +00:00], ["name", ["name1", "name2"]], ["updated_at", Thu, 25 Jul 2013 16:36:57 UTC +00:00]]
   (153.1ms)  commit transaction
Redirected to http://localhost:3000/tasks/1
Completed 302 Found in 165ms (ActiveRecord: 158.7ms)

我想为我输入的每个名称分别指定一个任务/名称。

4

1 回答 1

0

在 Rails 4 中，强参数功能要求您将控制器内的参数列入白名单。另外，根据这里的答案，如果没有进一步的调整，一组参数就不能被列入白名单，所以你需要

params.require(:task).permit(name: [])
于 2013-07-25T16:02:51.247 回答