Nil object nightmare

rubyonrails-talk
1

I’m having a real problem with nil objects in a view I’m playing with.

if I type …

<%= debug lesson.lesson_register.attendees %>

I get the following displayed in the browser …

- !ruby/object:Attendee
  attributes:
    enrollee_id: "25"
    created_at: 2009-08-27 15:10:41
    updated_at: 2009-08-27 15:10:41
    id: "1"
    attended: f

    lesson_register_id: "1"
  attributes_cache: {}

- !ruby/object:Attendee
  attributes:
    enrollee_id: "26"
    created_at: 2009-08-27 15:10:41
    updated_at: 2009-08-27 15:10:41

    id: "2"
    attended: t
    lesson_register_id: "1"

  attributes_cache: {}

if I type …

<%= debug lesson.lesson_register.attendees[0] %>

I get correctly …

--- !ruby/object:Attendee
attributes:
  enrollee_id: "25"
  created_at: 2009-08-27 15:10:41
  updated_at: 2009-08-27 15:10:41
  id: "1"

  attended: f
  lesson_register_id: "1"
attributes_cache: {}

BUT, when I type …

<%= debug lesson.lesson_register.attendees[0].created_at %>

I get …

You have a nil object when you didn't expect it!
The error occurred while evaluating nil.created_at
Extracted source (around line **#7**):

7: <%= debug lesson.lesson_register.attendees[0].created_at %>

Can someone tell me what I’m doing wrong.

TIA

-Ants