Question

I can’t get how to do one thing. I have models User, Teacher, TeacherEducation. TeacherEducation belongs to Teacher, Teacher belongs to User. I would like to save User, Teacher and TeacherEducation in one line by user.save in my controller. Is that possible? If no then which is better way to save that?

class User < ActiveRecord::Base
  attr_accessible ...,
                  :teacher_attributes
  has_one :teacher
  accepts_nested_attributes_for :teacher 
end

class Teacher < ActiveRecord::Base
  belongs_to :user 
  has_one :teacher_education
  accepts_nested_attributes_for :teacher_education
end

class TeacherEducation < ActiveRecord::Base
  belongs_to :teacher
end

Right now without TeacherEducation i have such view

<%= form_for @user, :url => create_teacher_url, :html => {:class => "form-horizontal"} do |f| %>
  <%= field_set_tag do %>
    <%= f.fields_for :teacher do |builder| %>
    # Fields of teacher
    <% end %>
    # Fields of user
<% end %>

My controller

class AdminsController < ApplicationController
  def new_teacher
    @user = User.new
    teacher = @user.build_teacher
    ...
  end

  def create_teacher   
    user = User.new( params[:user] )

    if user.save
    ...
    end
  end
end

Answer 1

This should work, I think..

<%= form_for @user, :url => create_teacher_url, :html => {:class => "form-horizontal"} do |f| %>
  <%= field_set_tag do %>
    <%= f.fields_for :teacher do |builder| %>
      # Fields of teacher
      <%= builder.fields_for :teacher_education do |edu_fields| %>
        # Fields of teacher_education
      <% end %>
    <% end %>
    # Fields of user
<% end %>