From 2594f2abe9144d1a50c8c7404627817ebd0386f0 Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@loudthinking.com>
Date: Mon, 10 Jan 2005 23:57:36 +0000
Subject: Added that form helpers now take an index option #448 [Tim Bates]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@378 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
---
 actionpack/lib/action_view/helpers/form_helper.rb | 27 +++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

(limited to 'actionpack/lib/action_view/helpers/form_helper.rb')

diff --git a/actionpack/lib/action_view/helpers/form_helper.rb b/actionpack/lib/action_view/helpers/form_helper.rb
index 105f464fc8..bed9eae244 100644
--- a/actionpack/lib/action_view/helpers/form_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_helper.rb
@@ -45,6 +45,15 @@ module ActionView
     #     <input type="submit" value="Save">
     #   </form>    
     #
+    # If the helper is being used to generate a repetitive sequence of similar form elements, for example in a partial
+    # used by render_collection_of_partials, the "index" option may come in handy. Example:
+    #
+    #   <%= text_field "person", "name", "index" => 1 %>
+    #
+    # becomes
+    # 
+    #   <input type="text" id="person_1_name" name="person[1][name]" value="<%= @person.name %>" />
+    #
     # There's also methods for helping to build form tags in link:classes/ActionView/Helpers/FormOptionsHelper.html, 
     # link:classes/ActionView/Helpers/DateHelper.html, and link:classes/ActionView/Helpers/ActiveRecordHelper.html
     module FormHelper
@@ -201,17 +210,31 @@ module ActionView
 
       private
         def add_default_name_and_id(options)
-          options['name'] = tag_name unless options.has_key? "name"
-          options['id'] = tag_id unless options.has_key? "id"
+          if options.has_key? "index"
+            options['name'] = tag_name_with_index(options["index"]) unless options.has_key? "name"
+            options['id'] = tag_id_with_index(options["index"]) unless options.has_key? "id"
+            options.delete("index")
+          else
+            options['name'] = tag_name unless options.has_key? "name"
+            options['id'] = tag_id unless options.has_key? "id"
+          end
         end
 				
         def tag_name
           "#{@object_name}[#{@method_name}]"
         end
+				
+        def tag_name_with_index(index)
+          "#{@object_name}[#{index}][#{@method_name}]"
+        end
 
         def tag_id
           "#{@object_name}_#{@method_name}"
         end
+
+        def tag_id_with_index(index)
+          "#{@object_name}_#{index}_#{@method_name}"
+        end
     end
   end
 end
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