无法在嵌套属性中允许强参数

Question

我正在尝试使用单一表单将数据存储在多个表中。

  def account_params
    params.require(:account).permit(:status,:display_name, 
    :acc_billing_address_attributes =>[
    :first_name, :last_name])
 end

我的问题是，当我尝试在表中存储数据时，数据成功存储在帐户表和acc_billing_addresses表中，空白数据存储在表中，错误为：Unpermitted parameter:acc_billing_address 这些值以参数形式检索。 在我的控制器中我有：

    def create
      @account = Account.new(account_params)
      @account.build_acc_billing_address
    end

我的模特是：

class Account < ApplicationRecord
has_one :acc_billing_address
accepts_nested_attributes_for :acc_billing_address
end

和

class AccBillingAddress < ApplicationRecord
belongs_to :account
end

这是我的表格

<%= form_for(:account, url:  account_index_path) do |f| %>

      <table border = "0", cellpadding = "10", cellspacing = "0">
        <tbody>
          <tr>
            <b> Branding Options</b>
            <td align = "left", height = "25"> Display Name</td>
            <td align = "left">
              <%= f.text_field :display_name%>
            </td>
          </tr>

        </tbody>
      </table>
          <%= f.fields_for :acc_billing_address do |builder| %>
            <tr>
              <b> Billing Address </b>
              <td align = "left", height = "25"> Contact First Name</td>
              <td align = "left">
                <%= builder.text_field :first_name %>
              </td>
              <td align = "left", height = "25"> parent id</td>
              <td align = "left">                  
              </td>
              <td align = "left", height = "25"> Contact Last Name</td>
              <td align = "left">
                <%= builder.text_field :last_name %>
              </td>
            </tr>

          <% end %>
          <tr>
            <td align = "left">  
              <%= f.submit "Submit" %>
            </td>
          </tr>
        </tbody>
      </table>
    </td>
  <% end %>