nested_forms creating default tasks from category tasks

gistfile1.rb

<!-- START category.rb -->
class Category < ActiveRecord::Base
  has_many :tickets
  has_many :tasks
  accepts_nested_attributes_for :tasks, :allow_destroy => true, :reject_if => proc { |obj| obj.blank? }
end
<!-- END category.rb -->

<!-- START ticket.rb -->
class Ticket < ActiveRecord::Base
  belongs_to :category
  has_and_belongs_to_many :accounts
  has_many :tasks
  accepts_nested_attributes_for :tasks, :allow_destroy => true, :reject_if => proc { |obj| obj.blank? }

  validates_presence_of :title, :status, :requestor_id, :starts, :target, :message => "Can't be blank"
end
<!-- END ticket.rb -->

<!-- START task.rb -->
class Task < ActiveRecord::Base
  belongs_to :category
  belongs_to :ticket
end
<!-- END task.rb -->

<!-- START _form.html.erb (Category) -->
<%= nested_form_for @category do |f| %>
<%= f.error_messages %>
<p>
	<%= f.label :title %><br />
	<%= f.text_field :title %>
</p>
<p>
	<%= f.label :description %><br />
	<%= f.text_area :description, :rows => 3 %>
</p>
<% if @category.parent_category_id? %>
<p>
	<%= collection_select(:category, :parent_category_id, Category.where(:parent_category_id => nil), :id, :title, :include_blank => true) %>
</p>
<% end -%>

<div id="add_default_tasks">
	<h2>Default Tasks</h2>
	<%= f.fields_for :tasks do |task_form| %>
	  <%= task_form.text_field :name %>
	  <%= task_form.link_to_remove "Remove this task", :class => "remove_task" %>
	<% end %>
	<p><%= f.link_to_add "Add a task", :tasks, :class => "add_task" %></p>
	<div class="clear"></div>
</div>

<p><%= f.submit %></p>
<% end %>
<!-- END _form.html.erb (Category) -->


<!-- START _form.html.erb (Ticket) -->
<%= nested_form_for @ticket, :validate => true do |f| %>

<p>
	<%= f.label :title %><br />
	<%= f.text_field :title, :autocomplete => "off" %>
</p>

<p>
	<%= f.label :category_id, "Select a Category" %>
	<select id="ticket_category_id" name="ticket[category_id]">
		<option value=""></option> 
		<% for category in Category.where("categories.parent_category_id IS NULL") %>
			<option value="<%= category.id %>"><%= category.title %></option>
			<% if !Category.where('parent_category_id = ?', category.id).blank? %>
				<% for child_cat in Category.where('parent_category_id = ?', category.id) %>
					<option value="<%= child_cat.id %>"> - <%= child_cat.title %></option>
				<% end %>
			<% end %>
		<% end %>
	</select>
</p>

<div id="add_default_tasks">
	<h2>Default Tasks</h2>
	<%= f.fields_for :tasks do |task_form| %>
		<% if @ticket.tasks.blank? && !@ticket.category.blank? && !@ticket.category.tasks.blank? %>
			<% for task in @ticket.category.tasks %>
				<%= task_form.text_field :name, :value => task.name %>
				<%= task_form.link_to_remove "Remove this task", :class => "remove_task" %>
			<% end %>
		<% elsif !@ticket.tasks.blank? %>
			<% for task in @ticket.tasks %>
				<%= task_form.text_field :name, :value => task.name %>
				<%= task_form.link_to_remove "Remove this task", :class => "remove_task" %>
			<% end %>
		<% else %>
			<%= 3.times do %>
				<%= task_form.text_field :name, :value => task.name %>
				<%= task_form.link_to_remove "Remove this task", :class => "remove_task" %>
			<% end %>
		<% end %>
	<% end %>
	<p><%= f.link_to_add "Add a task", :tasks, :class => "add_task" %></p>
	<div class="clear"></div>
</div>

<%# ... %>

<p><%= f.submit %></p>

<% end %>
<!-- END _form.html.erb (Ticket) -->