"No entities found; create your models first!"

[reedlaw]

I'm using rails-erd 0.4.3 in a Rails 3.0.4 app with Ruby 1.8.7 and when I run rake erd or rake erd filetype=dot in the Rails root directory I get the following error:

Loading code in search of Active Record models...
Generating Entity-Relationship Diagram for 0 models...
rake aborted!
No entities found; create your models first!

It says I have 0 models but running ls -1 app/models/ | wc -l gives me a result of 48.

[rolftimmermans]

Thank you for reporting this. Rails ERD eager loads your Rails application's environment. It relies on Rails to do this properly. There might be something off with the configuration.

Could you please try the following? In your Rails app, type "rails console" to start an interactive Rails session. Now enter "Rails.application.config.eager_load_paths". This should return the paths that are automatically loaded by Rails, and therefore by Rails ERD. Could you post these paths?

[reedlaw]

Here are the results:

[~/sb/ampms] git:next $ rails c
Loading development environment (Rails 3.0.4)
ruby-1.8.7-p302 > Rails.application.config.eager_load_paths
 => ["/Users/reed/sb/ampms/app/controllers", "/Users/reed/sb/ampms/app/helpers", "/Users/reed/sb/ampms/app/models"]

[ylansegal]

Hey, first of all, thanks for rails-erd, I find the diagrams really useful!

I have the same problemas the OP, but it used to work fine for me.
Here is my output:

Loading application environment...
Loading code in search of Active Record models...
Generating Entity-Relationship Diagram for 0 models...
rake aborted!
No entities found; create your models first!

I did some git bisect magic to find the commit that broke the functionality and it turns out that the problem seems to be a conflict with the 'kaminari" gem. As soon as I add "gem Kaminari" to my Gemfile, rake erd doesn't find any models.

Here is a link to the gem in question:
https://github.com/amatsuda/kaminari

I hope this helps!

[reedlaw]

Thanks! That did the trick. I had that gem bundled but without it rails-erd works flawlessly.

[ylansegal]

Any idea on how to have my cake and eat it too? I want kaminari, but I also want rails-erd!

[rolftimmermans]

Thank you for your detective work! It turns out this is a problem with Kaminari.

I have opened a pull request (https://github.com/amatsuda/kaminari/pull/34); let's hope it gets merged quickly. I will keep this issue open until a fixed version of Kaminari is released, in case other people come across the same problem.

[rolftimmermans]

Kaminari has been fixed as of version 0.10.4! It should now play nice with Rails ERD and other gems that depend on ActiveRecord::Base.descandants.

Thank you both for reporting this problem and your help in solving it!

amatsuda/kaminari@cb65a17

[reedlaw]

Thanks for fixing this!

[ylansegal]

Hey, that did the trick for me as well. Amazing turn around time rolftimmermans (and also amatsuda)!

Thanks.