試圖更新數據庫 - 獲取錯誤的錯誤數量的參數？

Question

我加入考勤跟蹤到我的應用程序，基本時鐘輸入/時鐘輸出能力

我得到wrong number of arguments (0 for 1)這條線：

scope :running, -> { where(clock_out: nil).where.not(clock_in: nil) } 

這是我有：

控制器：

class AttendenceRecordsController < ApplicationController 
    def clock_in 
    @clock_in = current_user.attendence_records.create(clock_in: DateTime.current) 
    respond_to do |format| 
     if @clock_in.save 
     format.html { redirect_to root_path, notice: "You've clocked in successfully" } 
     else 
     format.html { redirect_to root_path, notice: "Something went wrong, you were not clocked in" } 
     end 
    end 

    end 

    def clock_out 
    current_user.attendence_records.running.first.finish! 
    respond_to do |format| 
     format.html { redirect_to root_path, notice: "You've clocked out successfully" } 
    end 

    end 
end 

型號條

class AttendenceRecord < ActiveRecord::Base 
    belongs_to :users 


    scope :running, -> { where(clock_out: nil).where.not(clock_in: nil) } 

    def finish! 
    update(clock_out: DateTime.current) 
    end 
end 

路線

Mysupport::Application.routes.draw do 

    put "attendence_records/clock_in", to: "attendence_records#clock_in", as: :attendence_clock_in 
    put "attendence_records/clock_out", to: "attendence_records#clock_out", as: :attendence_clock_out 

end 

查看

<ul class="dropdown-menu"> 
        <li><%= link_to "Clock In", attendence_clock_in_path, method: :put %></li> 
        <li><%= link_to "Clock Out", attendence_clock_out_path, method: :put %</li> 
</ul> 

Answer 1

where.not Rails中引入4

對於導軌3時，使用

where('clock_in is not null') 

Answer 2

您使用的是哪個版本的Rails？

In Rails 3.x where.not未實現。