Pass all options on input_field method as input_html option

lib/simple_form/form_builder.rb

@@ -91,7 +91,8 @@ module SimpleForm
     end
     alias :attribute :input
 
-    # Creates a input tag for the given attribute.
+    # Creates a input tag for the given attribute. All the given options
+    # are sent as :input_html.
     #
     # == Examples
     #
@@ -105,6 +106,7 @@ module SimpleForm
     #        name="user[name]" size="100" type="text" value="Carlos" />
     #
     def input_field(attribute_name, options={})
+      options[:input_html] = options.dup
       options.merge!({:components => [:input], :wrapper => false})
       input(attribute_name, options)
     end

test/form_builder_test.rb

@@ -388,6 +388,22 @@ class FormBuilderTest < ActionView::TestCase
     assert_no_select '.hint'
   end
 
+  test 'builder should allow passign options to input tag' do
+    with_concat_form_for(@user) do |f|
+      f.input_field :name, :id => 'name_input', :class => 'name'
+    end
+
+    assert_select 'input.string.name#name_input'
+  end
+
+  test 'builder should generate an input tag with a clean HTML' do
+    with_concat_form_for(@user) do |f|
+      f.input_field :name
+    end
+
+    assert_no_select 'input.string[input_html]'
+  end
+
   # WITHOUT OBJECT
   test 'builder should generate properly when object is not present' do
     with_form_for :project, :name