如何在新操作中使用带有 belongs_to 关联的嵌套属性？

Question

在update 操作上，以下nested_form 有效，但在create 上出现此错误：

Couldn't find Student with ID=12 for Cv with ID=

控制器：

def new
  @cv = Cv.new
  @cv.student = current_student
end

def create
  @cv = Cv.new(params[:cv])

  if @cv.save
    redirect_to student_dashboard_path,
      notice: t('activerecord.successful.messages.created', model: @cv.class.model_name.human)
  else
    render 'new'
  end
end

型号：

class Cv < ActiveRecord::Base
  attr_accessible :student_attributes

  belongs_to :student
  accepts_nested_attributes_for :student
end

查看：

= f.simple_fields_for :student do |s|
  = s.input :english_level, collection: [['Low', 1], ['High', 2]]

Answer 1

您也应该对您的 route.rb 进行更改。

resources :parent do
  resources :child
end

看看 Jose Valim 的这个有用的实现 - inherited-resources。