Domain Model shows only ActiveRecord::SchemaMigration

[slhodak]

Hi all,

Apologies in advance for the inexperience that may be reflected in this question. I'd really like to get rails-erd to work, but I'm getting a strange output.

Environment

Ruby 2.4.3; Sinatra 2.6.14; ActiveRecord 4.2.8; MySQL 5.7.
The database is running in a Docker service on my local machine.

Output

I'm generating a model (erd.pdf) that has one element in it, titled "ActiveRecord::SchemaMigrations," with one property: "version: string *".

Output with bundle exec erd:

Loading application in '***'...
Generating entity-relationship diagram for 1 models...
Diagram saved to 'erd.pdf'.

Trace with rake:

** Invoke erd (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute erd

Procedure

Added the rails-erd gem and re-ran bundle install.
$ bundle exec erd

I also saw instructions regarding Sinatra and created a rake task that calls "RailsERD::Diagram::Graphviz.create," then ran
$ bundle exec rake erd

Both methods produce the same single-element model (there are about 50 files in models/ ).

I hope you can tell from the symptoms what could be going wrong--please let me know if there is anything else useful I can share.