ruby-on-rails - Rails 3 - 为 belongs_to 模型提供 id 的正确方法

Question

我有两个模型:User 和 Teacher:

class User < ActiveRecord::Base
  attr_accessor   :password                                                               
  attr_accessible :user_login,                                                           
                  :user_role,
                  :password,
                  :teacher_attributes

  has_one :teacher
  accepts_nested_attributes_for :teacher                                                  
end

# Table name: teachers
#
#  id                  :integer         not null, primary key
#  user_id             :integer
#  teacher_last_name   :string(255)
#  teacher_first_name  :string(255)
#  teacher_middle_name :string(255)
#  teacher_birthday    :date
#  teacher_sex         :string(255)
#  teacher_category    :string(255)
#  created_at          :datetime
#  updated_at          :datetime

class Teacher < ActiveRecord::Base
  attr_accessible :teacher_last_name,
                  :teacher_first_name,
                  :teacher_middle_name,
                  :teacher_birthday,
                  :teacher_sex,
                  :teacher_category

  belongs_to :user
end

我的 Controller 中还有一个方法应该创建用户，然后是新老师。但是不能正常工作，因为我没有在那里传递 id。

我的 Controller

class AdminsController < ApplicationController
  def create_teacher
    user_errors, teacher_errors, redirect_path = nil, nil, nil 

    params[:user][:user_role] = "teacher"
    user = User.new(params[:user])                           #Problem is here

    if user.save
      redirect_path = admins_users_of_system_path
      flash[:success] = "Teacher created!"
    else
      redirect_path = admins_new_teacher_path
      user_errors = user.errors.full_messages.to_sentence                                     
      teacher_errors = user.teacher.errors.full_messages.to_sentence if user.teacher
    end

    errors_arr = [user_errors, teacher_errors].compact
    flash[:error] = errors_arr if errors_arr.present? 
    redirect_to redirect_path
  end
end

我在 Controller 中有这样的代码，因为我想从用户和老师那里获取所有错误。

错误

["Teacher user can't be blank", "User can't be blank"]

utf8: ✓
authenticity_token: Hsw9BGOMb37cku6R2aAZsXkYaU5DFZqlUML4yZjqxI0=
user: !ruby/hash:ActiveSupport::HashWithIndifferentAccess
  teacher_attributes: !ruby/hash:ActiveSupport::HashWithIndifferentAccess
    teacher_last_name: Popov
    teacher_first_name: Igor
    teacher_middle_name: Yurevich
    teacher_sex: m
    teacher_birthday: 28.08.1991
    teacher_category: Something 1
  user_login: schoolh_MXWTQ
  password: eviRDyalXnHlK6q
  user_role: teacher
commit: Создать
controller: admins
action: create_teacher

如何同时正确创建教师和用户？我应该如何传递一个 ID？

Answer 1

另一种方法是在第一轮简单地创建用户，包括教师角色。然后管理员填写第二个表格，其中包含个人资料详细信息，如果您愿意，可以填写“填写您的个​​人资料”(教师模型仍会包含此内容。)

无论哪种方式，您可能都需要 delegates_to 方法来访问方法 http://apidock.com/rails/v3.1.0/Module/delegate

此外，无论您如何操作，您都可以考虑将 attr_accessible 排除在外，直到它以其他方式正常工作。

但如果你找到一种方法同时创建它们，我将第一个复制你!