How to retrieve more data in aggregation?

Question

I am using following aggregation:

searchOptions.aggs = {
  categories: {
    terms: {
      field: \"CategoryId\"
    }
  }
}

This works howeve

Answer 1

If you want to get category name for that id then,

{
   "size": 0,
   "aggs": {
      "category": {
         "terms": {
            "field": "categoryId"
         },
         "aggs":{
             "categoryName" :{
                 "terms" :{
                     "field" :"categoryName"
                 }
             }
         }
      }
   }
}

So, sub-aggregation(which is nested in above) gives you categoryName for its id.