我使用的是序列工厂女孩获得独特的价值观，但我得到验证错误

Question

我有限定的本方式的模型

class Lga < ActiveRecord::Base
  validates_uniqueness_of :code
  validates_presence_of :name
end 

我定义为L气体工厂与

Factory.sequence(:lga_id) { |n| n + 10000 }

Factory.define :lga do |l|
  id = Factory.next :lga_id
  l.code "lga_#{id}"
  l.name "LGA #{id}"
end

然而，当我运行

Factory.create(:lga)
Factory.create(:lga)

在script/console我得到

>> Factory.create(:lga)
=> #<Lga id: 2, code: "lga_10001", name: "LGA 10001", created_at: "2010-03-18  23:55:29", updated_at: "2010-03-18 23:55:29">
>> Factory.create(:lga)
ActiveRecord::RecordInvalid: Validation failed: Code has already been taken

Answer 1

问题是code和name属性未所谓的懒惰属性。我曾想过写东西喜欢的：

Factory.define :lga do |l|
  l.code { |n| "lga_#{n+10000}" }
end

但我想重用在name属性的ID了。您可以确保 比id每次评估Factory.create通过把它在一个after_build钩调用。

Factory.define :lga do |l|
   l.after_build do |lga|
     id = Factory.next :lga_id
     lga.code = "lga_#{id}"
     lga.name = "LGA #{id}"
   end
end

在FactoryGirl 1.2.3这仅适用于以上。

Answer 2

在前面的回答仍然是正确的，但在FactoryGirl的新版本，你会得到一个警告。

Factory.next has been depreciated. Use FactoryGirl.generate instead.

新代码应该是这样的：

Factory.define :lga do |l|
   l.after_build do |lga|
     id = FactoryGirl.generate :lga_id
     lga.code = "lga_#{id}"
     lga.name = "LGA #{id}"
   end
end

来源： http://notesofgreg.blogspot.co。英国/ 2012/07 /万无一失-factorygirl-sequence.html