Rails上的复选框 [英] Checkboxes on Rails

问题描述

在Ruby on Rails中创建与某个问题相关的复选框的正确方法是什么？目前我有：

What's the correct way of making checkboxes that are related to a certain question in Ruby on Rails? At the moment I have:

<div class="form_row">
    <label for="features[]">Features:</label>
    <br><%= check_box_tag 'features[]', 'scenarios' %> Scenarios
    <br><%= check_box_tag 'features[]', 'role_profiles' %> Role profiles
    <br><%= check_box_tag 'features[]', 'private_messages' %> Private messages
    <br><%= check_box_tag 'features[]', 'chatrooms' %> Chatrooms
    <br><%= check_box_tag 'features[]', 'forums' %> Forums
    <br><%= check_box_tag 'features[]', 'news' %> News
    <br><%= check_box_tag 'features[]', 'polls' %> Polls
</div>

我还希望能够自动检查先前选择的项目）。

I also want to be able to automatically check the previously selected items (if this form was re-loaded). How would I load the params into the default value of these?

推荐答案

您正在查看以下内容：

<div class="form_row">
    <label for="features[]">Features:</label>
    <% [ 'scenarios', 'role_profiles', ... , 'polls' ].each do |feature| %>
      <br><%= check_box_tag 'features[]', feature,
              (params[:features] || {}).include?(feature) %>
      <%= feature.humanize %>
    <% end %>
</div>

虽然如果你已经有一个 Feature ，具有特征表和 has_many：features 关系，您可能想要：

Although if you already have a Feature model, with a features table and a has_many :features relationship, you probably want this:

<div class="form_row">
    <label for="feature_ids[]">Features:</label>
    <% for feature in Feature.find(:all) do %>
      <br><%= check_box_tag 'feature_ids[]', feature.id,
              @model.feature_ids.include?(feature.id) %>
      <%= feature.name.humanize %>
    <% end %>
</div>

这篇关于Rails上的复选框的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！