Ruby on rails 4 Rails 4，验证嵌套模型_Ruby On Rails 4

Ruby on rails 4 Rails 4，验证嵌套模型

ruby-on-rails-4

Ruby on rails 4 Rails 4，验证嵌套模型,ruby-on-rails-4,Ruby On Rails 4,我有两种型号： class Person has_one :user validates :document, uniqueness: true, on: :create class User belongs_to :person accepts_nested_attributes_for :person 然后我为用户提供了一个表单，其中包含了有关人员的信息： <%= form_for @user do |f| %> <%= f.fields_for :

我有两种型号：

class Person
  has_one :user
  validates :document, uniqueness: true, on: :create

class User
  belongs_to :person
  accepts_nested_attributes_for :person

然后我为

用户

提供了一个表单，其中包含了有关

人员的信息

：

<%= form_for @user do |f| %>
  <%= f.fields_for :person do |person_fields| %>
    <%= person_fields.label "Document" %>
    <%= person_fields.text_field :document %>
  <% end %>  
  <%= f.label "Username" %>
  <%= f.text_field :username %>
<% end %>

例如，当我选择

/users/edit/1

时，它会向用户加载其个人属性。如果我更改

用户名

并保存，则表明

文档编号已在使用

，仅在

创建

时绕过

人员

验证

唯一性

我是不是遗漏了什么？这样的验证不应该在嵌套表单上工作吗？

嵌套属性允许您通过父项（有一个，有多个）在关联记录上保存属性，而不是通过子项（属于）在父项上保存属性。你的模型关系不正确；根据Rails，嵌套属性通过父对象对子对象有效，而不是在下面的模型中指定的通过子对象对父对象有效

您的机型

class Person
  has_one :user
  validates :document, uniqueness: true, on: :create

class User
  belongs_to :person
  accepts_nested_attributes_for :person (sets up nested attributes for parent)

您可以通过父对象为子对象设置嵌套属性，例如

建议的更改

class Person
  has_one :user
  validates :document, uniqueness: true, on: :create
  accepts_nested_attributes_for :user

class User
  belongs_to :person

只有当模型中的嵌套关联设置正确时，表单上的嵌套才会起作用

侧边栏：的美：的逆这是一个侧栏，但与此上下文相关。的反向\u提供了从子对象到父对象的反向引用。你应该试试这个，看看它是如何为你的应用工作的。这是一件非常好的事情

    class Person
      has_one :user, inverse_of: person
      validates :document, uniqueness: true, on: :create
      accepts_nested_attributes_for :user

   class User
     belongs_to :person, inverse_of: user

调试问题（新增）我将on：：create验证作为测试添加到我的一个模型中。我会要求您在没有模型嵌套的情况下进行类似的测试；我认为在模型中测试on:create的逻辑是有益的，它将验证控制器的操作。然后才在嵌套属性上添加图层。你觉得怎么样

创建时重复字段=>回滚

Started POST "/locations" for 127.0.0.1 at 2015-07-20 08:03:36 -0500
Processing by LocationsController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"Fxxx", "location"=>{"name"=>"Foo", "food_trailer"=>"true", "street"=>"100 Main", "city"=>"Fredericksburg", "state"=>"Texas", "country"=>"US", "phone"=>"", "website"=>"", "short_desc"=>"A Texan, Ms. Diana has been cookin' up barbecue for 50 years and, spreadin' the “barbecue love” in Paris (France!) since 2010.", "known_for"=>"Tings", "meats_beef"=>"0", "meats_beef_ribs"=>"0", "meats_pork"=>"1", "meats_pork_ribs"=>"0", "meats_chicken"=>"0", "meats_turkey"=>"0", "meats_sausage"=>"0", "meats_venison"=>"0", "sauce"=>"0", "sides"=>"None"}, "commit"=>"Add Restaurant"}
  [1m[36mUser Load (0.0ms)[0m  [1mSELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1[0m  [["id", 8]]
  [1m[35m (0.0ms)[0m  BEGIN
  [1m[36mLocation Exists (46.9ms)[0m  [1mSELECT  1 AS one FROM "locations" WHERE "locations"."short_desc" = 'A Texan, Ms. Diana has been cookin'' up barbecue for 50 years and, spreadin'' the “barbecue love” in Paris (France!) since 2010.' LIMIT 1[0m
  [1m[35mLocation Exists (0.0ms)[0m  SELECT  1 AS one FROM "locations" WHERE ("locations"."latitude" IS NULL AND "locations"."longitude" IS NULL) LIMIT 1
  [1m[36m (46.9ms)[0m  [1mROLLBACK[0m

编辑时重复字段=>COMMIT

Started PATCH "/locations/46" for 127.0.0.1 at 2015-07-20 08:04:30 -0500
Processing by LocationsController#update as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"xxx", "location"=>{"name"=>"Grillrestaurant Rusticana", "street"=>"Grillparzerstraße 5, 81675", "city"=>"München", "state"=>"Alabama", "country"=>"US", "phone"=>"", "website"=>"", "short_desc"=>"A Texan, Ms. Diana has been cookin' up barbecue for 50 years and, spreadin' the “barbecue love” in Paris (France!) since 2010.", "known_for"=>"", "meats_beef"=>"0", "meats_beef_ribs"=>"0", "meats_pork"=>"0", "meats_pork_ribs"=>"0", "meats_chicken"=>"0", "meats_turkey"=>"0", "meats_sausage"=>"0", "meats_venison"=>"0", "sauce"=>"0", "sides"=>""}, "commit"=>"Save changes to Restaurant", "id"=>"46"}
  [1m[36mLocation Load (0.0ms)[0m  [1mSELECT  "locations".* FROM "locations" WHERE "locations"."id" = $1 LIMIT 1[0m  [["id", 46]]
  [1m[35m (0.0ms)[0m  BEGIN
  [1m[36mLocation Exists (0.0ms)[0m  [1mSELECT  1 AS one FROM "locations" WHERE ("locations"."latitude" = 48.1334073 AND "locations"."id" != 46 AND "locations"."longitude" = 11.6100255) LIMIT 1[0m
  [1m[35mSQL (15.6ms)[0m  UPDATE "locations" SET "short_desc" = $1, "meats_beef" = $2, "meats_pork" = $3, "meats_beef_ribs" = $4, "meats_pork_ribs" = $5, "meats_chicken" = $6, "meats_turkey" = $7, "meats_sausage" = $8, "meats_venison" = $9, "sauce" = $10, "latitude" = $11, "updated_at" = $12 WHERE "locations"."id" = $13  [["short_desc", "A Texan, Ms. Diana has been cookin' up barbecue for 50 years and, spreadin' the “barbecue love” in Paris (France!) since 2010."], ["meats_beef", "f"], ["meats_pork", "f"], ["meats_beef_ribs", "f"], ["meats_pork_ribs", "f"], ["meats_chicken", "f"], ["meats_turkey", "f"], ["meats_sausage", "f"], ["meats_venison", "f"], ["sauce", "f"], ["latitude", 48.13340729999999], ["updated_at", "2015-07-20 13:04:30.437500"], ["id", 46]]
  [1m[36m (46.9ms)[0m  [1mCOMMIT[0m