Strange error in POST requests

[pedrovinicius]

I'm following a tutorial teaching how to create an API with Napa, but when I do Post requests, the following error (that I can't understand) is generated:

TypeError at /contacts
compared with non class/module

Ruby    /home/pedro/.rvm/gems/ruby-2.0.0-p481@global/gems/grape-0.13.0/lib/grape/validations/validators/coerce.rb: in >=, line 35
Web POST localhost/contacts

This seems to be related with the grape gem. Anybody can help me please?

[umtrey]

Hi @pedrovinicius! Where is the tutorial and what step are you on? We can try to dig in with you a little bit.

[pedrovinicius]

Hi @umtrey !
Thanks for the reply 😃

This is the tutorial that I spoke in my post:
http://www.sitepoint.com/build-apis-with-napa/?utm_source=rubyweekly&utm_medium=email

I'm in step "Firing Some Requests". The previous steps I successfully concluded.