Use lambdas for the default_scope, a requirement on Mongoid >= 4.0.0.beta1

Author: rafaelgaspar

spec/mongoid_spec.rb

@@ -547,7 +547,7 @@ def filename
 
         @class.class_eval do
           embeds_one :mongo_location
-          default_scope where(:always_false => false)
+          default_scope ->{ where(:always_false => false) }
         end
 
         @doc = @class.new
@@ -642,7 +642,7 @@ def filename
 
         @class.class_eval do
           embeds_many :mongo_locations
-          default_scope where(:always_false => false)
+          default_scope ->{ where(:always_false => false) }
         end
 
         @doc = @class.new