From b8666608bdbd672d1f5f57913254bf27e3d52004 Mon Sep 17 00:00:00 2001
From: Lucas Carlson <lucas@rufy.com>
Date: Fri, 14 Nov 2008 00:49:10 -0800
Subject: [PATCH] Adding a :cast option to text_field in order to facilitate displaying data in a form in a more human friendly form.

For example:

   text_field(:shopping_cart, :price, :cast => lambda {|v| number_to_currency v})
    => <input type="text" id="shopping_cart_price" name="shopping_cart[price]" value="#{number_to_currency(@shopping_cart.price)}" />
---
 actionpack/lib/action_view/helpers/form_helper.rb |    6 +++++-
 actionpack/test/template/form_helper_test.rb      |    3 +++
 2 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/actionpack/lib/action_view/helpers/form_helper.rb b/actionpack/lib/action_view/helpers/form_helper.rb
index 621e294..fb8b5bc 100644
--- a/actionpack/lib/action_view/helpers/form_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_helper.rb
@@ -344,6 +344,9 @@ module ActionView
       #   text_field(:post, :title, :class => "create_input")
       #   # => <input type="text" id="post_title" name="post[title]" value="#{@post.title}" class="create_input" />
       #
+      #   text_field(:shopping_cart, :price, :cast => lambda {|v| number_to_currency v})
+      #   # => <input type="text" id="shopping_cart_price" name="shopping_cart[price]" value="#{number_to_currency(@shopping_cart.price)}" />
+      #
       #   text_field(:session, :user, :onchange => "if $('session[user]').value == 'admin' { alert('Your login can not be admin!'); }")
       #   # => <input type="text" id="session_user" name="session[user]" value="#{@session.user}" onchange = "if $('session[user]').value == 'admin' { alert('Your login can not be admin!'); }"/>
       #
@@ -556,8 +559,9 @@ module ActionView
         if field_type == "hidden"
           options.delete("size")
         end
+        caster = options.delete("cast") || lambda {|o| o}
         options["type"] = field_type
-        options["value"] ||= value_before_type_cast(object) unless field_type == "file"
+        options["value"] ||= caster.call(value_before_type_cast(object)) unless field_type == "file"
         options["value"] &&= html_escape(options["value"])
         add_default_name_and_id(options)
         tag("input", options)
diff --git a/actionpack/test/template/form_helper_test.rb b/actionpack/test/template/form_helper_test.rb
index 52e8bf3..a679182 100644
--- a/actionpack/test/template/form_helper_test.rb
+++ b/actionpack/test/template/form_helper_test.rb
@@ -93,6 +93,9 @@ class FormHelperTest < ActionView::TestCase
       '<input id="post_title" name="post[title]" size="30" type="text" value="Hello World" />', text_field("post", "title")
     )
     assert_dom_equal(
+      '<input id="post_title" name="post[title]" size="30" type="text" value="HELLO WORLD" />', text_field("post", "title", :cast => lambda {|v| v.upcase })
+    )
+    assert_dom_equal(
       '<input id="post_title" name="post[title]" size="30" type="password" value="Hello World" />', password_field("post", "title")
     )
     assert_dom_equal(
-- 
1.5.6