rspec users - Jun 2010 - RSpec 2: uninitialized constant - mocking belongs_to AR relation

gems/ruby-1.9.2-head/bundler/gems/rspec-
core-2398fcadf5beb256bed9c548c59445d3b4c8a047-master/lib/rspec/core/
backward_compatibility.rb:26:in `const_missing'': uninitialized
constant Message::User (NameError)
	from /Users/kristianconsult/.rvm/gems/ruby-1.9.2-head/bundler/gems/
rspec-expectations-996c752171a0a0e16347e934dadc25767e31186c-master/lib/
rspec/expectations/backward_compatibility.rb:6:in `const_missing''
	from /Users/kristianconsult/Development/Languages/Ruby/Apps/Web-apps/
Rails/Rails-3/Experimental/views_example/app/models/message.rb:2:in
`<class:Message>''
	from /Users/kristianconsult/Development/Languages/Ruby/Apps/Web-apps/
Rails/Rails-3/Experimental/views_example/app/models/message.rb:1:in
`<top (required)>''
--
class Message < ActiveRecord::Base
  belongs_to :recipient, :class_name => User.name

  validates_presence_of :title, :text, :recipient
end
--
require ''spec_helper''

class User
end

describe Message do
  before(:each) do
    @message = Message.new(
      :title => "foo",
      :text => "bar",
      :recipient => mock_model(User)
    )
  end
...
--
If I uncomment the :class_name option on the belongs_to relation of
Message:

    Failure/Error: @message = Message.new(
    uninitialized constant Message::Recipient

Hmm??

Cause of error:

class Message < ActiveRecord::Base
  belongs_to :recipient #, :class_name => User.name
--
it then by convention expects there to be a model class called
Recipient.

should instead be

class Message < ActiveRecord::Base
  belongs_to :recipient, :class_name => User.name

But then the User class must be a subclass of ActiveRecord, or have a
name method that returns "User" or even more simple:

class Message < ActiveRecord::Base
  belongs_to :recipient, :class_name => "User"