rails has_one belongs to form submission error - ruby-on-rails

Question

I have two models and i'm trying to integrate it, i can bring form another model, problem is while submission , id is being updated to null
orbituary model:
class Orbituarysite < ActiveRecord::Base
attr_accessible :birth_place, :death_place, :dob, :dod, :name, :living_place, :orbiturerimage, :salutation, :user_id
belongs_to :user
mount_uploader :orbiturerimage, OrbiturerUploader
has_one :notice_display
end
Notice model
class NoticeDisplay < ActiveRecord::Base
attr_accessible :message, :notice_type, :orbituarysite_id, :posted_by, :notice_event_places_attributes, :notice_event_contacts_attributes
belongs_to :orbituarysite
end
orbituary controller:
def show
#orbituarysite = Orbituarysite.find(params[:id])
if #orbituarysite.notice_display.nil?
#notice_display = #orbituarysite.build_notice_display
end
respond_to do |format|
format.html # show.html.erb
format.json { render json: #orbituarysite }
end
end
in orbituary sites show view:
<% if #orbituarysite.notice_display.nil? %>
<%= render 'notice_displays/form' , :remote => true %>
<% end %>
while i submit the form i get the following problem, i.e, aftter submission i redirect it to orbituary sites page so i get this in server,
Started GET "/orbituarysites/1" for 127.0.0.1 at 2013-09-05 08:58:45 +0530
Processing by OrbituarysitesController#show as HTML
Parameters: {"id"=>"1"}
User Load (1.6ms) SELECT "users".* FROM "users" WHERE "users"."id" = 1 LIMIT 1
Orbituarysite Load (1.8ms) SELECT "orbituarysites".* FROM "orbituarysites" WHERE "orbituarysites"."id" = $1 LIMIT 1 [["id", "1"]]
NoticeDisplay Load (0.8ms) SELECT "notice_displays".* FROM "notice_displays" WHERE "notice_displays"."orbituarysite_id" = 1 LIMIT 1
History Load (0.9ms) SELECT "histories".* FROM "histories" WHERE "histories"."orbituarysite_id" = 1 LIMIT 1
(0.5ms) BEGIN
(0.9ms) UPDATE "histories" SET "orbituarysite_id" = NULL, "updated_at" = '2013-09-05 03:28:46.214455' WHERE "histories"."id" = 2
(25.0ms) COMMIT
Rendered histories/_form.html.erb (125.2ms)
Rendered memories/_form.html.erb (9.1ms)
Rendered condolences/_form.html.erb (14.4ms)
Rendered orbiturer_share_images/_form.html.erb (6.2ms)
Rendered orbituarysites/show.html.erb within layouts/application (162.6ms)
Rendered orbituarysites/_form.html.erb (26.4ms)
Completed 200 OK in 944ms (Views: 504.5ms | ActiveRecord: 64.5ms)
how to change this because get false in
<% if #orbituarysite.notice_display.nil? %>
but in console i get true when it is nil and false when there is content
Please help me to solve this

Answer 1

.nil? does not always guarantee truthiness. Use #orbituarysite.notice_display.present?
Essentially, all nil's return true because in ruby all things are truthy except false and nil.
So you're code will always return TRUE because it will return nil. :-)