Rails 4.0.0 - Got “no implicit conversion of nil into String”

Question

Just installed a brand new Rails 4.0.0 app and I got this error ( https://gist.github.com/hartator/6404820 ) on http://0.0.0.0:3000 :

no implicit conversion of nil into String

activerecord (4.0.0) lib/active_record/connection_adapters/sqlite3_adapter.rb:24:in `initialize'
activerecord (4.0.0) lib/active_record/connection_adapters/sqlite3_adapter.rb:24:in `new'
activerecord (4.0.0) lib/active_record/connection_adapters/sqlite3_adapter.rb:24:in `sqlite3_connection'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:440:in `new_connection'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:450:in `checkout_new_connection'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:421:in `acquire_connection'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:356:in `block in checkout'
/Users/asa/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:355:in `checkout'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:265:in `block in connection'
/Users/asa/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:264:in `connection'
activerecord (4.0.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:546:in `retrieve_connection'
activerecord (4.0.0) lib/active_record/connection_handling.rb:79:in `retrieve_connection'
activerecord (4.0.0) lib/active_record/connection_handling.rb:53:in `connection'

My database.yml: http://pastebin.com/JM5TNmNU

I haven't done anything yet to the vanilla rails code. Any idea what could be the issue?

Using:

• Rails 4.0.0
• Ruby 2.0.0p195
• Mountain Lion 10.8.2

Answer 1

That sounds like a problem with your sqlite3 gem installation. Try:

gem pristine sqlite3

From the RubyGems documentation:

gem pristine

Restores installed gems to pristine condition from files located in the gem cache

Usage

 gem pristine [GEMNAME ...] [options] 

http://guides.rubygems.org/command-reference/#gem_pristine