# Accessing models in "mounted" Rails 3 app

**URL:** <https://www.ruby-forum.com/t/accessing-models-in-mounted-rails-3-app/186203>\
**Category:** Rails\
**Created:** [April 2, 2010, 3:13am UTC](https://www.ruby-forum.com/t/accessing-models-in-mounted-rails-3-app/186203 "2010-04-02T03:13:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Angelo\_Ashmore](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/82dd89/32.png) [@Angelo\_Ashmore](https://www.ruby-forum.com/u/Angelo_Ashmore)\
**Post date:** [April 2, 2010, 3:13am UTC](https://www.ruby-forum.com/t/accessing-models-in-mounted-rails-3-app/186203/1 "2010-04-02T03:13:00Z")

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This is the first time I’m working with Engine’s in Rails, let alone  
in Rails 3. I basically followed these steps to set up the mountable  
app:  
[http://blog.dynamic50.com/index.php/2010/02/rails-3-0-mount-multiple-apps-as-engines/](http://blog.dynamic50.com/index.php/2010/02/rails-3-0-mount-multiple-apps-as-engines/)

Now that the mountable app is built, I’m moving on to create the  
container app. In doing so, however, I am having trouble accessing the  
models in the mounted app.

Shop is a model I have the the mounted app, and when I try to access  
it in the container app, this is returned:

> > Shop.first  
> > =\> NoMethodError: undefined method `first’ for Shop:Module

Strangely enough, however, 3 of the mounted app’s 19 models are  
accessible in the container app. Shop.class.name returns “Module”  
while Employee.class.name returns “Class” (Employee is a working model  
in the container app).

I’m quite lost on this. Any help is greatly appreciated!

Thanks,  
Angelo

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<div class="post-metadata">

**Author:** ![Angelo\_Ashmore](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/82dd89/32.png) [@Angelo\_Ashmore](https://www.ruby-forum.com/u/Angelo_Ashmore)\
**Post date:** [April 2, 2010, 9:35pm UTC](https://www.ruby-forum.com/t/accessing-models-in-mounted-rails-3-app/186203/2 "2010-04-02T21:35:37Z")

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Okay, it looks like Rails is pulling an April Fools on me. It like 18  
of the 19 models are accessible. I tried to list all the models using:

ActiveRecord::Base.send(:subclasses).each { |model| puts model.name }

and it only returned three of the models. Accessing all the models  
directly (typing “Image” in the console, for example) accesses them  
correctly.

My Shop model, however, is still causing problems. Shop is definitely  
accessible in the mounted app, but acts as if it does not exist in the  
container app.

Angelo

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<div class="post-metadata">

**Author:** ![Angelo\_Ashmore](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/82dd89/32.png) [@Angelo\_Ashmore](https://www.ruby-forum.com/u/Angelo_Ashmore)\
**Post date:** [April 2, 2010, 9:50pm UTC](https://www.ruby-forum.com/t/accessing-models-in-mounted-rails-3-app/186203/3 "2010-04-02T21:50:16Z")

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I think I just realized why this is happening. The container app is  
just a sample for testing out the mounted app, and I named it “Shop”.  
I imagine there’s some kind of conflict going on between the Shop  
defined in application.rb and the Shop defined in the model.

Gonna go test this now, but I think that pretty much solves this  
mystery.