MongoDB Nested Population, #mongoDB #populate

app.js

Airlines.findById(id)
      .populate({
        path: 'flights',
        populate:[
          {
            path: 'planeType',
            model: 'Plane'
          },
          {
          path: 'destination',
          model: 'Location',
          populate: { // deeper
            path: 'state',
            model: 'State',
            populate: { // even deeper
              path: 'region',
              model: 'Region'
            },
              populate: { // even deepest :)
                path: 'road',
                model: 'Road'
            }
          }
        }]
      })