Recommit

.gitignore

@@ -2,5 +2,4 @@
 db/*.sqlite3
 log/*.log
 tmp/
-public/javascripts/
-public/stylesheets/
+

public/javascripts/nested_form.js

@@ -0,0 +1,46 @@
+$(function() {
+$('form a.add_nested_fields').live('click', function() {
+  // Setup
+  var assoc   = $(this).attr('data-association');           // Name of child
+  var content = $('#' + assoc + '_fields_blueprint').html(); // Fields template
+
+  // Make the context correct by replacing new_<parents> with the generated ID
+  // of each of the parent objects
+  var context = ($(this).closest('.fields').find('input:first').attr('name') || '').replace(new RegExp('\[[a-z]+\]$'), '');
+
+  // context will be something like this for a brand new form:
+  // project[tasks_attributes][1255929127459][assignments_attributes][1255929128105]
+  // or for an edit form:
+  // project[tasks_attributes][0][assignments_attributes][1]
+  if(context) {
+    var parent_names = context.match(/[a-z_]+_attributes/g) || [];
+    var parent_ids   = context.match(/[0-9]+/g);
+
+    for(i = 0; i < parent_names.length; i++) {
+      if(parent_ids[i]) {
+        content = content.replace(
+          new RegExp('(\\[' + parent_names[i] + '\\])\\[.+?\\]', 'g'),
+          '$1[' + parent_ids[i] + ']'
+        )
+      }
+    }
+  }
+
+  // Make a unique ID for the new child
+  var regexp  = new RegExp('new_' + assoc, 'g');
+  var new_id  = new Date().getTime();
+  content     = content.replace(regexp, new_id);
+
+  $(this).before(content);
+  return false;
+});
+
+$('form a.remove_nested_fields').live('click', function() {
+  var hidden_field = $(this).prev('input[type=hidden]')[0];
+  if(hidden_field) {
+    hidden_field.value = '1';
+  }
+  $(this).closest('.fields').hide();
+  return false;
+});
+});