Question

我遇到了nested_attributes的问题，我有下一个实体：

class Experience < ActiveRecord::Base
  has_many :roles, inverse_of: :experience
end

class Role < ActiveRecord::Base
  belongs_to :experience, inverse_of: :roles
end

我有下一组参数：

 params = {"end_date"=>"02/01/2012",
 "city"=>"Buenos Aires",
 "state"=>"",
 "country"=>"",
 "title"=>nil,
 "company"=>"Restorando",
 "current"=>nil,
 "description"=>nil,
 "roles_attributes"=>
  [{"id"=>558, "title"=>"System Owner", "start_date"=>"03/01/2000", "end_date"=>"02/01/2001", "description"=>"<p>I did a bunch of stuff</p>", "current"=>false},
   {"id"=>561, "title"=>"Test", "description"=>nil, "current"=>nil},
   {"id"=>557, "title"=>"Full Stack Developerr", "start_date"=>"01/01/2011", "end_date"=>"02/01/2012", "description"=>"<p>Full Stack Developer description</p>", "current"=>false}],
 "resumes_experiences_attributes"=>[{"id"=>384, "resume_id"=>809}, {"id"=>385, "resume_id"=>3199}]}

我想更新一个rails模型。所以我执行：

@experience = Experience.find(some_id)
@experience.update_attributes(params)

这会给我一个错误

ActiveRecord :: RecordNotUnique：PG :: UniqueViolation：ERROR：重复键值违反了唯一约束＆＃34; roles_pkey＆＃34;

如果我看到Rails尝试更新的内容，我会看到下一个sql声明：

更新＆＃34;角色＆＃34; SET＆＃34; start_date＆＃34; = $ 1，＆＃34; end_date＆＃34; = $ 2，＆＃34;当前＆＃34; = 3美元，＆＃34; ID＆＃34; = $ 4，＆＃34;描述＆＃34; = 5美元，＆＃34;标题＆＃34; = $ 6，＆＃34; created_at＆＃34; = 7美元，＆＃34;的updated_at＆＃34; = $ 8 WHERE＆＃34;角色＆＃34;。＆＃34; id＆＃34; = $ 9 [[＆＃34; start_date＆＃34;，nil]， [＆＃34; end_date＆＃34;，nil]，[＆＃34;当前＆＃34;，nil]，[＆＃34; id＆＃34;，561]，[＆＃34;说明＆＃34;， nil]，[＆＃34; title＆＃34;，＆＃34; Test＆＃34;]，[＆＃34; created_at＆＃34;，＆＃34; 2017-06-23 10：54：10.194605＆＃34 ]， [＆＃34; updated_at＆＃34;，＆＃34; 2017-06-23 10：54：10.194605＆＃34;]，[＆＃34; id＆＃34;，558]]

对我来说很奇怪，因为它正在尝试更新记录id，如果你看到你将看到的陈述："id" = $4和where WHERE "roles"."id" = $9这是id正确，但它采用两个不同的@experience = Experience.include(:roles).find(some_id) @experience.update_attributes(params)值。

相反，如果我执行：

true

完美无缺

如果我进入rails控制台并手动触发它，初始情况也会起作用。我不知道为什么会发生这种情况，当然应用程序中存在更多的复杂性，我只是给你解决它的基本数据，但任何见解都会有所帮助。

Rails嵌套属性尝试更新记录ID

0 个答案: