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

currently implementing threaded messaging. via railscast

i've installed ancestry gem, messages create parents. ie.) ancestry = nil

even after passing parent:id 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

<% 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 |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 message:

key point - i'm passing parent_id (144) in message ancestry still passes nil.

 parameters: {"utf8"=>"✓", "authenticity_token"=>"gkvr06ot+6ocaerhazsx79vtljlniofmeojzpdzmfwm=", "message"=>{**"parent_id"=>"114"**, "recipient"=>"rach miller", "body"=>"meh , more meh"}, "commit"=>"send threaded reply"}   user load (0.6ms)  select "users".* "users" "users"."id" = 17 limit 1   user load (0.6ms)  select "users".* "users" "users"."name" = 'rach miller' limit 1    (0.2ms)  begin   sql (0.7ms)  insert "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 , 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]] 

after bigxiang's comment, decided take @ create function.

i have been passing params individually, using

@message.parent_id = params[:message][:parent_id] worked me

cheers