bolamn / loopback-mongo-aggregate-mixin Goto Github PK

i found that from here which doesnt support from this mixin.

When i use loopback explorer and put this in the filter

{"aggregate": {"lookup": {"from": "UserAccount", "localField": "userId", "foreign": "_id", "as": "userAccount"}}}

an error occurs

TypeError: Cannot read property 'map' of undefined
at C:\development\wms\api\node_modules\loopback-mongo-aggregate-mixin\dist\aggregate.js:54:32
at handleCallback (C:\development\wms\api\node_modules\mongodb\lib\utils.js:96:12)
at C:\development\wms\api\node_modules\mongodb\lib\cursor.js:836:22
at handleCallback (C:\development\wms\api\node_modules\mongodb-core\lib\cursor.js:159:5)
at C:\development\wms\api\node_modules\mongodb-core\lib\cursor.js:577:22
at queryCallback (C:\development\wms\api\node_modules\mongodb-core\lib\cursor.js:200:16)
at Callbacks.emit (C:\development\wms\api\node_modules\mongodb-core\lib\topologies\server.js:119:3)
at Connection.messageHandler (C:\development\wms\api\node_modules\mongodb-core\lib\topologies\server.js:397:23)
at Socket. (C:\development\wms\api\node_modules\mongodb-core\lib\connection\connection.js:302:22)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at readableAddChunk (_stream_readable.js:176:18)
at Socket.Readable.push (_stream_readable.js:134:10)
at TCP.onread (net.js:548:20)

How to correctly use lookup in aggregate?

Hi, I have putted below code on filter of explorer but it always show all object
{ "aggregate": { "group": { "id": "$isCompleted", "count": { "$sum": 1 } } } }
It seem to I have wrong in structure or something like that.
I want to count all object that have field "isCompleted", so do you have any hints?

Any hint? Thanks