Rails 4 Join table query not working

Rails
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

In questions_controller:
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

On 8 March 2014 20:49, Dave C. [email protected] wrote:

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.

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

On 8 March 2014 20:49, Dave C. [email protected] wrote:

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

4

Yes - below pasted directly from the console…

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

OK, looks like I’m getting ubiquitous “NameError”

NameError (uninitialized constant Sprockets::Helpers):
app/uploaders/image_uploader.rb:10:in <class:ImageUploader>' app/uploaders/image_uploader.rb:3:in<top (required)>’
app/models/picture.rb:6:in <class:Picture>' app/models/picture.rb:1:in<top (required)>’
app/controllers/pictures_controller.rb:7:in `index’
error also.

May be a config problem??

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

DAve

5

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

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

Dave

6

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

7

On Saturday, March 8, 2014 5:52:41 PM UTC-5, Ruby-Forum.com User wrote:

Posted via http://www.ruby-forum.com/.

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.