Question

我在控制器上使用了会话变量 session [：parent] ，我想将这些变量传递给模型。如何将控制器中的参数传递给模型？

这是我的controller.rb文件

def new
  @child = Child.new
  @child.pickup_people.build
  @classes =  [['Infant', 0], ['Toddlers', 1], ['Early learners', 2], ['Pre school', 3], ['Pre kindergarten', 4]]
  @parent_types =  [['Father', 'father'], ['Mother', 'mother'], ['Other', 'other']]
  @martial_status = [['Married', 'married'], ['Single', 'single'], ['Divorced', 'divorced'], ['Separated', 'separated'], ['Widowed', 'widowed'], ['Other', 'other']]
  @parent = Parent.new

 #parents those will be mapped with child, here mentioned to show in form page after creation

 if session[:parent_id] != nil
   @parent_sessions = Parent.where(:id => session[:parent_id])
 end
end

def create
  logger.debug "\033[31mI am here\033[31m"
  @child = Child.new(child_params)
  if current_user.has_role? :day_care
    @child.day_care_id = current_user.day_care.id
  elsif current_user.has_role? :director
    @child.day_care_id = current_user.director.day_care.id
  elsif current_user.has_role? :assistant_director
    @child.day_care_id = current_user.assistant_director.day_care.id
  elsif current_user.has_role? :teacher
    @child.day_care_id = current_user.teacher.day_care.id
  end
  respond_to do |format|
    if @child.save
    #        logger.debug "\033[31m#{session[:parent_id]}\033[31m"
      if session[:parent] != nil
        session[:parent].each do |p|
          Relative.create(:child_id => @child.id, :parent_id => p["id"].to_i, :parent_type => p["type"])
        end
      end
    ####
      gflash :success => "Child was succesfully created."
      format.html { redirect_to @child }
      format.json { render :show, status: :created, location: @child }
      session[:parent] = nil
      session[:parent_id] = nil

      logger.debug "\033[31mdestroyed#{session[:parent_id]}\033[31m"
    else
      gflash :error => "Unable to create, please try again."
      format.html { render :new }
      format.json { render json: @child.errors, status: :unprocessable_entity }
    end
  end
end

感谢您的帮助！

Answer 1

模型是数据库的接口。它们可以在没有会话的情况下使用（例如来自IRB）。允许模型与会话进行通信将违反MVC。因此会话对象在模型中不可见。将它作为参数传递给模型中的方法，或者在模型中定义一个返回所需内容的方法，然后将其存储在会话中（来自控制器）。

例如

class User < ActiveRecord::Base
  def item_status
    return :no_such_item
  end
end

在您的控制器中

session[:item_status] = current_user.item_status

我希望它能让你清楚......

如何在Ruby on Rails中访问从控制器到模型的会话变量

1 个答案: