Ancestry Gem saves all threaded messages as Parent - ruby-on-rails

Question

Currently implementing Threaded Messaging. via RailsCast
I've installed the Ancestry gem, however all messages that I create are parents. ie.) Ancestry = nil
Even after passing my parent:id to new action
Message Controller
def index
#message = Message.new
#user = current_user
#sent_messages = current_user.sent_messages
#received_messages = current_user.received_messages
end
def new
#message = Message.new
#message.parent_id = params[:parent_id]
end
Index.html
<% for incoming in #received_messages %>
<%= render partial: "message", locals: {incoming: incoming} %>
_message.html.erb
</div>
<%= link_to "Reply", new_message_path(:parent_id => incoming) ,class: "regular" %>
</div>
new.html.erb
<%= form_for #message do |f| %>
<p>
To:<br />
<%= f.hidden_field :parent_id %>
<%= f.hidden_field :recipient, :value => (#message.parent.sender.name) %>
</p>
<p>
Message<br />
<%= f.text_area :body %>
</p>
<p>
<%= submit_tag "Send Threaded Reply" %>
</p>
<% end %>
Message.rb
class Message < ActiveRecord::Base
attr_accessible :recipient, :subject, :body, :parent_id
has_ancestry
end
My console after creating a message:
Key point - I'm passing the parent_id (144) in Message however ancestry still passes as nil.
Parameters: {"utf8"=>"✓", "authenticity_token"=>"gKVr06oT+6OcAERHAzSX79vTlJLniofmEOjZPdZmfwM=", "message"=>{**"parent_id"=>"114"**, "recipient"=>"Rach Miller", "body"=>"meh and more meh"}, "commit"=>"Send Threaded Reply"}
User Load (0.6ms) SELECT "users".* FROM "users" WHERE "users"."id" = 17 LIMIT 1
User Load (0.6ms) SELECT "users".* FROM "users" WHERE "users"."name" = 'Rach Miller' LIMIT 1
(0.2ms) BEGIN
SQL (0.7ms) INSERT INTO "messages" ("ancestry", "body", "created_at", "read_at", "recipient_deleted", "recipient_id", "sender_deleted", "sender_id", "subject", "updated_at") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10) RETURNING "id" [["ancestry", nil], ["body", "meh and more meh"], ["created_at", Tue, 20 Aug 2013 03:14:15 UTC +00:00], ["read_at", nil], ["recipient_deleted", false], ["recipient_id", 18], ["sender_deleted", false], ["sender_id", 17], ["subject", nil], ["updated_at", Tue, 20 Aug 2013 03:14:15 UTC +00:00]]

Answer 1

After Bigxiang's comment, I decided to take a look at my create function.
I have been passing my params individually, So using
#message.parent_id = params[:message][:parent_id] worked for me
Cheers