Activerecord problem..

rubyonrails-talk
1

I have the following method....

def index     @posts=Post.find(:all, :include => [:user, :comments])     for post in @posts       puts "Post: #{post.title}"       puts "Written by: #{post.user.title}"       puts "Last comment on: #{post.comments.first.created_at}"     end end

(the use model) class User < ActiveRecord::Base   has_many:posts end

(the post model)

class Post < ActiveRecord::Base   belongs_to:user   has_many :comments, :order => 'created_at DESC' end

when i run the application I get the following errors why ? Am i missing something ???

NoMethodError in TestController#index

You have a nil object when you didn't expect it! The error occurred while evaluating nil.title

RAILS_ROOT: D:/InstantRails-2.0-win/rails_apps/active Application Trace | Framework Trace | Full Trace

app/controllers/test_controller.rb:6:in `index' app/controllers/test_controller.rb:4:in `each' app/controllers/test_controller.rb:4:in `index'

2

Looks like you've got a post without a user. Check what is actually in the database.

Fred

3

Frederick Cheung wrote:

4

Frederick Cheung wrote:

5

What you're seeing suggests that your data isn't quite what you think it is. Identify the post for which post.user is returning nil and workout why. unless you've got not null on user_id, the foreign key constraint won't prevent a null user_id.

Fred