Rails class method help - How to take the sum of the columns that is created today

Question

I want to take the sum of the all the columns earn that have the date today. I am trying to make a class method.

How to take the sum of all the columns earn where the column dato have the date today and display it in view?

My controller:

class ReklamersController < ApplicationController
layout 'reklamer'
def index

@reklamers = Reklamer.find(:all)

end
end

My model:

  def self.total_on(date)
      where("dato(date) = ?", date).sum(:earn)
    end

My view:

<td><b><%= @reklamer.total_on(dato) %></b></td>

Index: Error: undefined local variable or method `dato'

Best regards,

A rails beginner

Answer 1

该类方法应该在您的模型中，而不是在控制器中。