values validator can no longer accept a range

[smathieu]

We're currently migration from grape 0.9.0 to 0.10.1. This validator that use to work now stopped working:

    params do
      requires :score, type: Integer, values: 0..10, desc: "..."
    end

relevant stacktrace:

     TypeError:
       no implicit conversion of Range into Array

     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/validations/validators/values.rb:14:in `validate_param!'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/validations/validators/base.rb:17:in `block in validate!'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/validations/attributes_iterator.rb:15:in `block (2 levels) in each'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/validations/attributes_iterator.rb:14:in `each'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/validations/attributes_iterator.rb:14:in `block in each'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/validations/attributes_iterator.rb:13:in `each'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/validations/attributes_iterator.rb:13:in `each'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/validations/validators/base.rb:15:in `validate!'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/endpoint.rb:235:in `block in run'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/endpoint.rb:233:in `each'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/endpoint.rb:233:in `run'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/endpoint.rb:195:in `block in call!'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/newrelic-grape-2.0.0/lib/newrelic-grape/instrument.rb:21:in `call'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/newrelic-grape-2.0.0/lib/newrelic-grape/instrument.rb:21:in `block in call!'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/newrelic_rpm-3.9.9.275/lib/new_relic/agent/instrumentation/controller_instrumentation.rb:366:in `perform_action_with_newrelic_trace'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/newrelic-grape-2.0.0/lib/newrelic-grape/instrument.rb:20:in `call!'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/middleware/base.rb:18:in `call'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/middleware/base.rb:24:in `call!'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/middleware/base.rb:18:in `call'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/middleware/base.rb:24:in `call!'
     # /Users/simon/.rvm/gems/ruby-2.2.0@rainforest/gems/grape-0.10.1/lib/grape/middleware/base.rb:18:in `call'

In this case, it's easy to convert the range to an array, but it might not be possible if you have a large range. It also feels like the range is more intention revealing than an array here.

[dblock]

This is likely a legit regression. Would appreciate a spec (and maybe a fix ;)).