Rails的選擇 - 默認選擇的值誤差

我想設置爲select選定的屬性，但它似乎並不奏效Rails的選擇 - 默認選擇的值誤差

<%= f.fields_for :age_range, OpenStruct.new(@campaign.age_range) do |d| %> 

       <div class="form-group"> 
        <%= d.label :min, "Age Range", :class => 'col-sm-2 control-label' %> 
        <div class="col-sm-2"> 
        <%= d.text_field :min, :class => 'form-control' %> 
        <%= d.select :min, options_for_select(13..90), { include_blank: "Min Age", selected: '23' }, { class: 'form-control'} %> 
        </div> 
        <div class="col-sm-2"> 
        <%= d.text_field :max, :class => 'form-control' %> 
        <%= d.select :max, options_for_select(13..90), { include_blank: "Max Age", selected: '23' }, { class: 'form-control'} %> 
        </div> 
       </div> 
       <div class="line line-dashed b-b line-lg pull-in"></div> 

      <% end %>

即使通過強制值我不能夠得到它選擇

從答案

<%= d.select :min, options_for_select((13..90), @campaign.age_range[:min]), { include_blank: "Min Age" }, { class: 'form-control'} %>

但更新是無法訪問分鐘的散列值來選擇的值

@campaign[:age_range] is a hash in the database

來源

2016-04-26 Harsha M V

試'options_for_select（（13..90），23）' – Nithin

HTTP：// apidock .COM /導軌/的ActionView /助手/ FormOptionsHelper/options_for_select – Pavan

你可以提供它作爲第二個參數，以輔助方法options_for_select，例如：

# Static number 
options_for_select(13..90, 13) 

# or retrieved somehow from form object 
options_for_select(13..90, d.object.min)

來源

2016-04-26 08:59:12 DanneManne

Rails的選擇 - 默認選擇的值誤差

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