我有一个研究案例项目，使用 Rails 4、RSpec、FactoryGirl、Faker ......
但是 rspec 测试在开发环境中随机失败。我正在搜索很多，但如果有人能帮我弄清楚，我将不胜感激。
以下是测试文件、工厂和模型的链接：
待测试模型：https ://github.com/freaktags/core/blob/master/app/models/user.rb
用户工厂：https ://github.com/freaktags/core/blob/master/spec/factories/users.rb
测试自己：https ://github.com/freaktags/core/blob/master/spec/models/user_spec.rb
当它失败时，总是产生一个几乎像这样的堆栈：
Failure/Error: @chloe = FactoryGirl.create(:user)
ActiveRecord::RecordInvalid:
translation missing: pt-BR.activerecord.errors.messages.record_invalid
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353@global/gems/activerecord-4.1.8/lib/active_record/validations.rb:57:in `save!'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353@global/gems/activerecord-4.1.8/lib/active_record/attribute_methods/dirty.rb:29:in `save!'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353@global/gems/activerecord-4.1.8/lib/active_record/transactions.rb:273:in `block in save!'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353@global/gems/activerecord-4.1.8/lib/active_record/transactions.rb:329:in `block in with_transaction_returning_status'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353@global/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/database_statements.rb:201:in `block in transaction'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353@global/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/database_statements.rb:209:in `within_new_transaction'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353@global/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/database_statements.rb:201:in `transaction'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353@global/gems/activerecord-4.1.8/lib/active_record/transactions.rb:208:in `transaction'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353@global/gems/activerecord-4.1.8/lib/active_record/transactions.rb:326:in `with_transaction_returning_status'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353@global/gems/activerecord-4.1.8/lib/active_record/transactions.rb:273:in `save!'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353/gems/factory_girl-4.5.0/lib/factory_girl/configuration.rb:14:in `block in initialize'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353/gems/factory_girl-4.5.0/lib/factory_girl/evaluation.rb:15:in `[]'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353/gems/factory_girl-4.5.0/lib/factory_girl/evaluation.rb:15:in `create'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353/gems/factory_girl-4.5.0/lib/factory_girl/strategy/create.rb:12:in `block in result'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353/gems/factory_girl-4.5.0/lib/factory_girl/strategy/create.rb:9:in `tap'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353/gems/factory_girl-4.5.0/lib/factory_girl/strategy/create.rb:9:in `result'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353/gems/factory_girl-4.5.0/lib/factory_girl/factory.rb:42:in `run'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353/gems/factory_girl-4.5.0/lib/factory_girl/factory_runner.rb:23:in `block in run'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353@global/gems/activesupport-4.1.8/lib/active_support/notifications.rb:161:in `instrument'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353/gems/factory_girl-4.5.0/lib/factory_girl/factory_runner.rb:22:in `run'
# /Users/marceloboeira/.rvm/gems/ruby-2.0.0-p353/gems/factory_girl-4.5.0/lib/factory_girl/strategy_syntax_method_registrar.rb:20:in `block in define_singular_strategy_method'
# ./spec/models/user_spec.rb:8:in `block (2 levels) in <top (required)>'