Where to define custom schema using RailwayJS

The docs simply say "or define custom schema (non-juggling), for example, mongoose. Please note, in case of custom schema all jugglingdb features of course will be disabled."

However..

Where exactly should this schema be created?

I believe you can still create it inside db/schema.js. For example:

customSchema(function () {

   var mongoose = require('mongoose');
   mongoose.connect('mongodb://localhost/test');

   var Schema = mongoose.Schema, ObjectId = Schema.ObjectId;

   var BlogPost = new Schema({
        author    : ObjectId
      , title     : String
      , body      : String
      , date      : Date
   });

  var Post = mongoose.model('BlogPost', BlogPost);
  Post.modelName = 'BlogPost'; // this is for some features inside railway (helpers, etc)

  module.exports['BlogPost'] = Post;

});