REST API with JSON content missing false values (#20788).

Patch by Yuichi HARADA.

git-svn-id: http://svn.redmine.org/redmine/trunk@17643 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine/views/builders/structure.rb

@@ -47,7 +47,7 @@ module Redmine
         end
 
         def method_missing(sym, *args, &block)
-          if args.any?
+          if args.count > 0
             if args.first.is_a?(Hash)
               if @struct.last.is_a?(Array)
                 @struct.last << args.first unless block

test/unit/lib/redmine/views/builders/json_test.rb

@@ -18,6 +18,15 @@
 require File.expand_path('../../../../../../test_helper', __FILE__)
 
 class Redmine::Views::Builders::JsonTest < ActiveSupport::TestCase
+  def test_nil_and_false
+    assert_json_output({'value' => nil}) do |b|
+      b.value nil
+    end
+
+    assert_json_output({'value' => false}) do |b|
+      b.value false
+    end
+  end
 
   def test_hash
     assert_json_output({'person' => {'name' => 'Ryan', 'age' => 32}}) do |b|