軌道上的紅寶石has_many驗證

Question

可以說襯衫上有錯誤。錯誤還會出現在person.errors中嗎？ 如果是這樣，我怎麼能達到它？ （我不希望使用person.shirt.errors）

class Person < ActiveRecord::Base 
     has_one : shirt 
     has_many : pants 
     validates :name, :presence => true 
     validates_length_of :name, :minimum => 3 
end 

person = Person.new(:name => "JD") 
person.shirt.create(:color=> "red") 
person.pants.create(:type=> "jeans") 
person.valid? 

Answer 1

根據這篇文章似乎對兒童實體錯誤將會在被複制到父保存，看到here -> Validations section雖然這可能是因爲改變

Validations simply work as you'd expect; 
#valid? will also validate nested models, 
#save(false) will save without validations, etc. 

The only thing to note is that all error messages 
from the nested models are copied to the parent errors 
object for error_messages_for. This will probably change 
in the future, as discussed on the ticket, but that's 
outside of the scope of this patch. 

Answer 2

它應該加載到「person.errors」中。你可以通過調用

person.errors.at(:<replace_this_with_name_of_attribute>) 

達到它，你也可以撥打

person.errors.each { |attr, msg| puts "attr = '#{attr}', msg = '#{msg}'" } 

檢查所有的錯誤屬性的名稱和相應的錯誤信息。祝你好運！