Added FormBuilder#validate

Inject validators for attributes that are not rendered initially on the
form object

Author: bcardarella

lib/client_side_validations/action_view/form_builder.rb

@@ -34,6 +34,13 @@ def client_side_form_settings(options, form_helper)
       end
     end
 
+    def validate(*attrs)
+      attrs.each do |attr|
+        build_validation_options(attr)
+      end
+      nil
+    end
+
     def initialize_with_client_side_validations(object_name, object, template, options, proc)
       initialize_without_client_side_validations(object_name, object, template, options, proc)
       @options[:validators] = { object => {} }

test/action_view/cases/test_helpers.rb

@@ -516,4 +516,13 @@ def test_text_field_with_custom_name
     assert_equal expected, output_buffer
   end
 
+  def test_text_field_with_added_validators
+    form_for(@post, :validate => true) do |f|
+      concat f.validate(:cost, :body, :title)
+    end
+
+    validators = {'post[cost]' => {:presence => [{:message => "can't be blank"}]}, 'post[body]' => {:presence => [{:message => "can't be blank"}]}}
+    expected = whole_form('/posts', 'new_post', 'new_post', :validators => validators)
+    assert_equal expected, output_buffer
+  end
 end

test/action_view/models/post.rb

@@ -5,7 +5,7 @@ class Post
   include ActiveModel::Conversion
 
   attr_accessor :title, :author_name, :body, :secret, :written_on, :cost
-  validates :cost, :presence => true
+  validates :cost, :body, :presence => true
 
   def initialize(params={})
     params.each do |attr, value|