How do I write an aggregate using mongoose feathers adapter?

Question

I'm new to feathersjs framework and try to write aggregation query it's not working properly.

hook.app.query = { 
   lookup: {
      from: "orders",
      localField:"serviceLocationId",
      foreignField:"serviceLocationId",
      as: "orders" 
   },
   match: { serviceLocationId : { $in: Array.from(new Set(reqArr)) } },
   limit: 14 
}

hook.app.service('servicelocations')
    .find(hook.app.query)
    .then(result => {
        console.log(result)
    })

Answer 1

we need to use following way service.Model.aggregate then its working fine

function locations(hook) {
    return new Promise((resolve,reject) =>{
        hook.app.service('location')
          .Model.aggregate(hook.app.query)
          .then(result => {
            resolve(result)
          }).catch(e=>{
            reject(e)
          })
      })
}