Class User < ActiveRecord::Base has_many :articles
class Article < ActiveRecord::Base belongs_to :user
After a user posts an article, I want to include their username. I presume I should just be able to use <%= article.user.screen_name %> in the articles/index. This give me:
You have a nil object when you didn't expect it! The error occurred while evaluating nil.screen_name
Sean, did you check your database? Is user_id filled up correctly?
tom
Sean Six wrote:
I know this doesn't help the core problem, but it might help in debugging to set that column to 'NOT NULL' in your database, and set a default value.
I can get <%= article.user_id %> to print the id number of the user. But when I try to use <%= article.user.screen_name %> I get the error:
You have a nil object when you didn't expect it! The error occurred while evaluating nil.screen_name
Could this mean that the user_id field in the article table is filled in but there is no user with that id? Have a look in the database. I would have thought this might produce a different error though.
If the db is ok use the ruby debugger to break at that point and see what the variables are set to.
Colin