rails form_中的单选按钮值不属于params [:model]的一部分

Question

我有一个模型(CustInfo),它包含3个属性:cust_name,age,gender.在我的编辑视图中,我使用form_for进行表单提交:

<%= form_for @cust[0] do |cust| %>
    <label for="cname">Customer name: </label>
    <%= cust.text_field :cust_name, :size => 20 %>

    <label for="age">Customer age: </label>
    <%= cust.text_field :age, :size => 5 %>

    <label for="gender">Gender </label>
    <%= radio_button_tag(:gender, "F", :checked => (:gender == 'female')? true:false) %><span style="float:left">F</span>
    <%= radio_button_tag(:gender, "M", :checked => (:gender == 'male')? true:false) %><span style="float:left">M</span>        
    <%= cust.submit "Save" %>
<% end %>

在我的控制器中我有

def update
    if Cust.update_all(params[:custinfo])
        flash[:notice] = "Successfully updated!"
        redirect_to :action => "index"
    else
        flash[:notice] = "There are errors in the form, please try again"
        render :action => "edit"
    end
end

当我按下提交按钮时,表单已提交,其参数如下:

Parameters: {"utf8"=>"?", "authenticity_token"=>"I9QEdP1mRr65wT9TRbzNokkaa+LHVyPfmgWJMKoup", "custinfo"=>{"age"=>"16", "cust_name"=>"jsmith"}, "gender"=>"M","commit"=>"Save"}.

看起来性别确实通过params传递,但它不在params [:model]中,在这种情况下是params [:custinfo],这就是更新函数不会更新这个值的原因(因为我只有Cust.update_all( PARAMS [:custinfo])).我的问题是为什么只有这个单选按钮不在params [:custinfo]中,而另外两个是？如何在params [:custinfo]中传递单选按钮值？谢谢!

Answer 1

尝试更换您的radio_button_tag呼叫,cust.radio_button以便Rails知道这些单选按钮适用于您的客户模型.

您也可以简化:checked => (:gender == 'female')? true:false到只是:checked => (:gender == 'female')因为==操作符提供了一个布尔结果.