用factory - girl /Faker生成3个字母的字符串

I would like to generate random, unique strings matching this pattern: [A-Z]{3}. How can I achieve this with FactoryGirl or Faker?

我想生成与此模式匹配的随机、惟一的字符串:[A-Z]{3}。我如何与工厂女孩或伪造者达成这一目标?

I thought about FactoryGirl's sequences, but can't make it work.

我想过工厂女孩的序列，但没能成功。

2 个解决方案

#1

Try this:

试试这个:

FactoryGirl.define do
  sequence :str do |n|
    (0..2).map { (65 + rand(26)).chr }.join
  end
end

FactoryGirl.generate :str # => "GUW" 

#2

I've ended up with:

我结束了:

sequence(:code) { ('A'..'Z').to_a.sample(3).join }