Question

我正在使用Ruby on Rails测试网站，它基本上是我们实际网站的副本。在更新用户数据时，我注意到在测试和实时环境中用户表中都包含department_id和department_name，而不是仅仅加入department_id并始终从department表中提取信息。当有人切换部门时，现有代码会更新users表中的department_id，但不更新department_name。如何实现这一点我不确定，因为有一些地方直接从users表中取出department_name，我手动更新了不正确的department_name字段。我需要在用户控制器中做什么才能让它根据department_id的department表中的内容更新用户表中的department_name？（我知道我可以重新创建要加入department_id的页面，而不是从dept表中提取名称，但我真的不想重写一堆不同的页面。）

users_controller.rb更新方法

def update
 @user = User.find(params[:id])
 email_changed = @user.email != params[:user][:email]
 #need to set user's department_name so it is updated in users table
 @user.update_without_password(params[:user])
 successfully_updated = true
 if successfully_updated
  flash[:notice] = "Profile was successfully updated"
  redirect_to @user
else
  render "edit"
end

结束

允许在用户/ _form.html.erb

中更改部门的表单控件

<% if current_user.is_admin? %>
  <%= f.association :department, label: false, :collection => 
      @departments, :prompt => "Select Department" %>
    ...

模型文件

class User < ActiveRecord::Base
 # Include default devise modules. Others available are:
 # :token_authenticatable, :confirmable,
 # :lockable, :timeoutable and :omniauthable
 devise :database_authenticatable, :registerable,
     :recoverable, :rememberable, :trackable, :validatable

 # Setup accessible (or protected) attributes for your model
 attr_accessible :email, :password, :password_confirmation, :remember_me,
  :username, :first_name, :middle_name, :last_name, :suffix, :department_id,   
  :department_name
  belongs_to :department
   ...

Answer 1

在User模型中：

before_save do
  self.department_name = department.name if department_id_changed?
end

Ruby on Rails根据另一个表值更新特定列

1 个答案: