将表单数据插入两个表中，一个提交到rails中

Question

嗨，我想使用客户id在一个表中插入客户名称，在另一个表插入客户城市。我的代码只插入客户。城市没有插入

我的控制台

在2017-01-30 14:40:15 0530开始为127.0.0.1发布POST"/页面"Pages计数器的处理#创建为超文本标记语言参数：{"utf8"=

新.html.erb

<%= form_for @customer, url: {action: "create"} do |f| %>
<%= label_tag("Customer") %>
<br>
<%= f.text_field(:name) %>
<br>
<%= f.fields_for @custcity do |c| %>
        <%= label_tag("City 1") %>
        <br>
        <%= c.text_field(:cityname) %>
        <br>
        <%= label_tag("City 2") %>
        <br>
        <%= c.text_field(:cityname) %>
        <br>
<% end %>
<br>
<%= f.submit("submit") %>
<% end %>

页面_控制器.rb

  def create
    @customer = Customer.new(cust_params)
    if @customer.save
       session[:customer_id] = @customer.id

      #@custcity = Custcity.create(cityname: params[:customer][:cityname], cust_id: session[:customer_id])
      @custcity = Custcity.create({cityname: params[:customer][:cityname], cust_id: @customer.id})
      #@custcity.save
      redirect_to pages_path
    else
      redirect_to new_page_path
    end
  end

  private
  def cust_params
    params.require(:customer).permit(:name, :custcity => [])
  end
end