将JavaScript变量传递给Rails控制器

post 'my_controller/receive_variable' => 'my_controller#receive_variable'

class MyController< ApplicationController
  def receive_variable
    variable = params[:variable]
    # 在这里处理变量
    render json: { status: 'success' }
  end
end

// 假设您已经将jQuery库添加到项目中
$.ajax({
  url: '/my_controller/receive_variable',
  type: 'POST',
  data: { variable: my_variable },
  dataType: 'json',
  success: function(response) {
    console.log('Variable sent successfully');
  },
  error: function(xhr, status, error) {
    console.log('Error: ' + error);
  }
});