Return some fields plus count???

[Fabrício Quintela]

Hi all,

Does anybody knows how to retrieve a list of fields plus a calculated field
like a subquery?

Scenario:

docs: [
{
  id: 123
  text:"AAA"
  parent:""
},
{
  id: 456
  text:"BBB"
  parent:"123"
},
id: 789
  text:"CCC"
  parent:"123"
]

My query fl=id, text, parent, count should return 123, "AAA", "", 2 when I
search by the id=123

Thanks all