Rails 4 Join table query not working

rubyonrails-talk
1

Hi, I wonder if anyone has any suggestions for solving the following issue. I just upgraded from rails 3.2.x to 4.0.3

The following was working in 3.2.x

def show     @question = Question.find(params[:id])     session[:question_id] = @question.id     @pictures = @question.pictures

Now however, I get the error: uninitialized constant Question::Picture (for the line @pictures = @question.pictures)

I have a join table "pictures_questions" and as I said this was working prior to the upgrade.

Any ideas?

Thanks,

Dave

2

You have not shown us the important code, the code in the models defining the relationships between them (has_many etc). Copy and paste the first few lines of each model showing the relationship definitions.

Do you get the problem every time you try to get pictures for a question?

Colin

3

You have not shown us the important code, the code in the models defining the relationships between them (has_many etc). Copy and paste the first few lines of each model showing the relationship definitions.

Do you get the problem every time you try to get pictures for a question?

Colin

class Picture < ActiveRecord::Base   attr_accessible :minisection_id, :contributor, :title, :remote_image_url, :image

  has_and_belongs_to_many :questions   has_and_belongs_to_many :minisections

class Question < ActiveRecord::Base   has_and_belongs_to_many :pictures

Yes, I cannot get past this error

Dave

4

Hi, I wonder if anyone has any suggestions for solving the following issue. I just upgraded from rails 3.2.x to 4.0.3

The following was working in 3.2.x

def show     @question = Question.find(params[:id])     session[:question_id] = @question.id     @pictures = @question.pictures

Now however, I get the error: uninitialized constant Question::Picture (for the line @pictures = @question.pictures)

Is that definitely the error? Question::Picture singular? Very odd.

Colin

5

Yes - below pasted directly from the console...

NameError (uninitialized constant Question::Picture):   app/controllers/questions_controller.rb:145:in `show'

Not sure where to even begin looking for the source of this error.

DAve

6

Commented out #include Sprockets::Helpers::RailsHelper   #include Sprockets::Helpers::IsolatedHelper

in image uploader and solved current problem... for now anyway.

Dave

7

Your problem is interesting, I’m not sure what’s going on. I seem to remember Sprockets::Helpers::RailsHelper and Sprockets::Helpers::IsolatedHelper were dropped in Rails 4 and people were including them in their code to make the Rails 4 pipeline backwards compatible to the Rails 3.1 pipeline. One of the things that changed between the two was the treatment of images when you ran assets pre-compile. Still not sure why that’s affecting you, but if it’s running with those two lines commented out, you’re probably OK.