Fixing as_json method for ScopeProxy

lib/octopus/scope_proxy.rb

@@ -37,6 +37,10 @@ def method_missing(method, *args, &block)
     result
   end
 
+  def as_json(options = nil)
+    method_missing(:as_json, options)
+  end
+
   # Delegates to method_missing (instead of @klass) so that User.using(:blah).where(:name => "Mike")
   # gets run in the correct shard context when #== is evaluated.
   def ==(*args)

spec/octopus/model_spec.rb

@@ -414,6 +414,17 @@
       User.using(:brazil).find_by_name("Joaquim").should_not be_nil
     end
 
+    it "as_json" do
+      ActiveRecord::Base.include_root_in_json = false 
+
+      Octopus.using(:brazil) do
+        User.create!(:name => "User1")
+      end
+
+      user = User.using(:brazil).where(:name => "User1").first
+      user.as_json(:except => [:created_at, :updated_at, :id]).should eq({"admin"=>nil, "name"=>"User1", "number"=>nil})
+    end
+
     it "transaction" do
       u = User.create!(:name => "Thiago")