PouchDB querying nested objects

heroes.js

var heroes = [
{
    id: 5,
    name: 'Batman',
    realName: 'Bruce Wayne',
    equipments: [
        {
            type: 'boomarang',
            name: 'Batarang',
        },

        {
            type: 'cloak',
            name: 'Bat Cloak',
        },

        {
            type: 'bolas',
            name: 'Bat-Bolas',
        }       
    ]
},
{
    id: 6,
    name: 'Cat Woman',
    realName: 'Selina Kyle',
    equipments: [
        {
            type: 'car',
            name: 'Cat-illac',
        },

        {
            type: 'bolas',
            name: 'Cat-Bolas',
        }      
    ]
}
];

mapfunction.js

function myMapFunction(doc) {
  doc.equipments.forEach(function (equipment) {
    emit(equipment.type);
  });
}

query.js

db.query(myMapFunction, {
  key: 'bolas', 
  include_docs: true
}).then(function (result) {
  // got result
});

result.json

{
  "total_rows": 5,
  "offset": 0,
  "rows": [
    {
      "doc": "...",
      "key": "bolas",
      "id": "...",
      "value": null
    },
    {
      "doc": "...",
      "key": "bolas",
      "id": "...",
      "value": null
    }
  ]
}

https://stackoverflow.com/questions/28273588/querying-nested-objects-in-pouchdb