rails/rails — pull request #7969 by senny (2012-10-16 19:37:47+00:00)
Title: active_model/validations requires necessary files to run

While writing isolated unit-tests I noticed that `active_model/validations` does not require the necessary files to run.

```shell
ruby -I activemodel/lib -I activesupport/lib -e "require 'active_support/all'; require 'active_model/validations'"
```

results in

```
/rails/activemodel/lib/active_model/validations/acceptance.rb:5:in `': uninitialized constant ActiveModel::Validations::EachValidator (NameError)
```

I added the necessary require statement to get everything working.