cannot load models within mountable engine on rails

Question

I have a rails project which uses mongo db, and I wrote an mountable engine named 'report_service'. I used it like this in main rails project: `gem 'report_service', :git => 'git@xx.com:report_service.git', :branch => :master, :require => false` I don't want this gem loaded when the rails project is initialized, so I added the `:require => false` option. But in my rails console, after I execute `require 'report_service'`, I cannot find models in this gem. ``` [1] pry(main)> ReportService => ReportService [2] pry(main)> ReportService::Engine NameError: uninitialized constant ReportService::Engine from (pry):2:in `

' [3] pry(main)> require 'report_service' => true [4] pry(main)> ReportService::Engine => ReportService::Engine [5] pry(main)> ReportService::RsExam NameError: uninitialized constant ReportService::RsExam from (pry):5:in `

' ``` Here is my report_service gem directory and code: report_service/lib/report_service.rb ``` require "active_record/railtie" require "report_…

Accepted Answer

Scrap that update. Just add `require "report_service/rs_exam"` into your `report_service.rb`.

```
require "active_record/railtie"
require "report_service/engine"
require "report_service/rs_exam"
module ReportService
end
```

My reasoning is that what is happening is that your loading the model `report_service/rs_exam` which is why you will get an uninitialized constant error. Because looking at the console output.

Loading the gem works fine.

```
require 'report_service'
=> true
```

The ReportService::Engine is loaded fine.

```
[4] pry(main)> ReportService::Engine
=> ReportService::Engine
```

But then when you try to load the rs_exam

```
[5] pry(main)> ReportService::RsExam
NameError: uninitialized constant ReportService::RsExam
from (pry):5:in `<main>'
```

you get your uninitialized constant error because it has not been required. Try that and let me know how you get on

cannot load models within mountable engine on rails

Solution

Problem