ruby-on-rails - Rails 4考勤系统

嗨，我正在努力构建一个rails 4应用程序，在rails4上实现一个考勤模型，我在stackoverflow上发现了两个问题，但是它们发布在2012年，当我尝试跟踪它们时失败了。
这是我最近得到的on stackoverflow
编辑：我已经看到了教室，列出了学生名单。可以把学生分配到教室里，但问题是让学生进入一个新的课堂，并让他们参加
这是我现在拥有的

# Attendance
# take student as a single entry for :attsheet and
# has a :attended (boolean) and remarks as well
class Attendance < ActiveRecord::Base
  belongs_to :student
  belongs_to :attsheet
end

#Attsheet which means attendance sheet
#has :post_date and :remark
class Attsheet < ActiveRecord::Base
  belongs_to :classroom
  has_many :attendances
  accepts_nested_attributes_for :attendances
end

class Student < ActiveRecord::Base
  belongs_to :school
  has_and_belongs_to_many :classrooms
  has_many :attendances
end

class Classroom < ActiveRecord::Base
  belongs_to :school
  has_and_belongs_to_many :students
  has_many :attsheets

  validates :class_name, presence: true
end

我希望教室能够为每个学生创建一个新的出勤或查看出勤档案。
我现在可以在教室里做这件事，但是我被困在控制器和视图下一步要做什么

 $ = link_to "New Attendance", new_school_classroom_attsheet_path(@school, @classroom, @attsheet)

最佳答案

在附件控制器中，

class AttendancesController < ApplicationController

    before_filter :set_parents

    def new
        @attendance= @classroom.attendances.new
    end

    def create
        @attendance= @classroom.attendances.new(params[:milestone])

        if @attendance.save
            redirect_to ....
        else
            render :action=>:new
        end
    end

   def set_parents
        @school= School.find(params[:school_id])
        @classroom= @school.classrooms.find(params[:classroom_id])
   end
end

在attendachen的form.html.erb中，

<%= form_for(@school, @classroom, @attendance]) do |f|%>
<% if @attendance.errors.present? %>
<ul class="warning">
    <% @attendance.errors.full_messages.each do |message| %>
    <li><%= message%></li>
    <% end %>
</ul>
<% end %>

<h2>Attendance</h2>
.........
<%= f.submit button %>
<% end %>

这将提交FOTM以创建出勤行动