这个问题发生在我创建一个销售的时候，有人知道为什么吗？我相信sales_controller中的参数是空的，我总是从有或没有scaffold的新视图创建东西，但是这一次我打算从其他视图创建，所以我不知道如何解决这个错误。请帮助我的兄弟们。
错误：
操作控制器：：SalesController #create中缺少参数
缺少参数或值为空：Sale
根目录：C：/用户/osmarvirux/下载/商店极客
应用程序跟踪|框架跟踪|完整跟踪
应用程序/控制器/销售控制器. rb：16：在"销售参数"中
应用程序/控制器/sales_controller. rb：3：在"创建"请求中
参数：
{" utf8 "=〉""，"真实性令牌"=〉" D6n验证+A8W + ykkQuk7wnK0vqbfuIxIGJDT0mQ0FODTyBAiy8F39491tfYJi9yJ5tzwFNxa6SfqfMuzZt3YVA =="}

销售控制器. rb

class SalesController < ApplicationController
        def create
          sale = Sale.create(sale_params)     
          respond_to do |format|
            if sale.save
              format.html { redirect_to root_path, notice: 'Datos guardados exitosamente.' }          
            else
              format.html { redirect_to root_path, alert: 'Hubo un error, comunicate con nosotros a cualquier numero telefonico' }
            end
          end      
        end

        private

        def sale_params
          params.require(:sale).permit(:country, :state, :city, :street, :colony, :number, :postal_code)
        end    
    end

支付成功. haml

.col-md-10.center-block.no-float.top-space.bottom
     %articule.card.large-padding

      %section.big-top-space
       %h2 Resumen de tu pedido
       .table-responsive
        %table.table.table-striped.table-hover.medium#table_shopping_cart
         %thead
          %td.success Product
          %td.success Costo   
         %tbody
          -@shopping_cart.in_shopping_carts.each do |i_sh|
           -product = i_sh.product
           %tr{id: "#{product.id}"}
            %td= product.name
            %td= "#{product.pricing / 100} USD"
           .col-lg-12
            %a.btn.btn-link.bold.medium.capitalize{"role" => 'button', "data-toggle" => 'collapse', "href": "#payment_succeed", "aria-expanded" => 'false', "aria-controls" => "payment_succeed"}
             Agregar informacion               
            .collapse#payment_succeed
             .well.inline-block.no-margin.no-padding
              .form-group   
               =form_tag "/ok", method: :post, class: "no-margin no-padding" do
                =text_field_tag :key_sale,nil, class:"form-control floating-label", placeholder: "Key"
                =text_field_tag :country,nil, class:"form-control floating-label", placeholder: "Pais"
                =text_field_tag :state,nil, class:"form-control floating-label", placeholder: "Estado"
                =text_field_tag :city,nil, class:"form-control floating-label", placeholder: "Ciudad"
                =text_field_tag :street,nil, class:"form-control floating-label", placeholder: "Calle"
                =text_field_tag :colony,nil, class:"form-control floating-label", placeholder: "Colonia"
                =number_field_tag :number,nil, class:"form-control floating-label", placeholder: "Numero"
                =number_field_tag :postal_code,nil, class:"form-control floating-label", placeholder: "Numero postal"
                =content_tag :button, type: :submit, class:"btn btn-primary bold" do
                 Aceptar

途径

post "/ok", to: "sales#create"