Rails CORS：ActionController :: RoutingError（没有与[OPTIONS]“ / batches”匹配的路线）：

我正在尝试在Rails中执行跨平台请求。

我的jQuery代码如下：

我的控制如下：-

def new
    @batch = Batch.new
    respond_to do |format|
      format.json
      format.html
    end
  end

  def create
    @batch = Batch.new(batch_param)
    respond_to do |format|
       if @batch.save
         format.json { render json: @batch, status: :created, location: @batch }
         format.html { redirect_to @batch, notice: "Save process completed!" }
       else
          format.html {
            flash.now[:notice]="Save proccess coudn't be completed!"
            render json: @batch.errors, status: :unprocessable_entity
          }
          format.json { render json: @batch.errors, status: :unprocessable_entity}
      end
    end
  end
def batch_param
      params.require(:batch).permit(:name, :course_id, :start_date, :end_date, :status)
    end

但是每次我尝试使用表单添加记录时，它都会在rails日志中显示以下错误：-

我提交我的第一个数据时出错

Started OPTIONS "/batches" for 127.0.0.1 at 2017-01-11 22:02:49 +0545
  ActiveRecord::SchemaMigration Load (0.5ms)  SELECT "schema_migrations".* FROM "schema_migrations"

ActionController::RoutingError (No route matches [OPTIONS] "/batches"):

当我一次提交数据时出错：-

Started OPTIONS "/batches" for 127.0.0.1 at 2017-01-11 22:08:50 +0545

ActionController::RoutingError (No route matches [OPTIONS] "/batches"):

谁能帮助我解决这个问题。

您需要配置Rails以支持CORS。

一种解决方案是使用rack-cors gem。

需要将以下片段添加到config / application.rb

module YourApp
  class Application < Rails::Application

    # ...

    # Rails 3/4

    config.middleware.insert_before 0, "Rack::Cors" do
      allow do
        origins '*'
        resource '*', :headers => :any, :methods => [:get, :post, :options]
      end
    end

    # Rails 5

    config.middleware.insert_before 0, Rack::Cors do
      allow do
        origins '*'
        resource '*', :headers => :any, :methods => [:get, :post, :options]
      end
    end

  end
end