Question

我正在尝试创建一个更新表格的表单。我想要一个下拉按钮，从一个名为“制造商”的表中提取信息，一旦提交表单，就将数据存储在“评论”表中。

这是我的表格：

<%= form_for(@review) do |f| %>
  <%= render 'shared/error_messages', object: f.object %>
  <div class="field" align= "center">
    <h3>Select bat</h3>
    <%= f.collection_select :bat_id, Manufacturer, include_blank: true %>
    <h3>What do you like about this bat?</h3>
    <%= f.text_area :pros, placeholder: "Enter what you like..." %>
    <h3>What do you not like about this bat?</h3>
    <%= f.text_area :cons, placeholder: "Enter what you don't like..." %></br>
  </div>
  <div align="center">
  <%= f.submit "Add Review", class: "btn btn-large btn-info" %>
  </div>
<% end %>

当你看到这一行 - <%= f.collection_select :bat_id, Manufacturer, include_blank: true %>我相信：bat_id告诉表单从哪里发送用户的输入。（在本例中为评论表中的：bat_id参数）

如何告诉表单从制造商表中选择下拉选项？

更新我需要在控制器中添加任何内容吗？

Answer 1

查看文档http://api.rubyonrails.org/classes/ActionView/Helpers/FormBuilder.html#method-i-collection_select

collection_select(method, collection, value_method, text_method, options = {}, html_options = {}) 
# method: the field in your form's object
# collection: the collection of active records to display as options
# value_method: which method call in items of the collection to get the displayed value
# text_method: which method call in items of the collection to get the id value

所以在你的情况下：

<%= f.collection_select :bat_id, Manufacturer.all, :id, :name, include_blank: true %>

鉴于Manufacturer模型具有name字段，否则您需要适应

rails表格使用多个表格

1 个答案: