Question

我在轨道上使用红宝石。尝试设置一个下拉菜单，供用户选择他们来自哪个州。是否可以将州作为选项显示，但将其选择记录为state_id？

.erb文件

$additional_parameters

州名表的数据库架构

<% provide(:title, 'New Profile') %>

  <%= bootstrap_form_for(@profile) do |f| %>

    <%= f.text_field :name, :autofocus => true, :placeholder => 'Name' %>
    <%= f.number_field :age, :placeholder => 'Age' %>
      <%= f.form_group :sex, label: { text: "Sex" } do %>
        <br>
      <%= f.radio_button :sex, 'Male', label: "Male", inline: true %>
      <%= f.radio_button :sex, 'Female', label: "Female", inline: true %>
    <% end %>

 <%= f.text_field :city, :id => 'gmaps-input-address', :placeholder => "City" %>

 <%= f.select :state_id, options_for_select(State.pluck(:home_state)), :label => "State", :class => "dropdown-menu" %>

<%= f.submit "Submit", :class =>'btn btn-primary' %>
<% end %>

配置文件表的架构

create_table "states", force: :cascade do |t|
  t.datetime "created_at", null: false
  t.datetime "updated_at", null: false
  t.string   "home_state"
  t.string   "code"
end

Answer 1

这绝对是可能的。你很接近，但你需要像这样格式化你的表单助手来获得所需的结果：

<%= f.select(:state_id, options_for_select(State.all.collect {|p| [ p.home_state, p.id ]), :label => "State", :class => "dropdown-menu")%>

此处有更多文档：http://apidock.com/rails/ActionView/Helpers/FormOptionsHelper/select

无法获取options_for_select来显示选项

1 个答案: