import {ShardingTest} from "jstests/libs/shardingtest.js" ; let s = new ShardingTest({name: "experimentColl" , shards: 2, mongos: 1}); let shardedDb = s.getDB( "test" ); s.adminCommand({enablesharding: "test" , primaryShard: s.shard1.shardName}); const experimentColl = shardedDb.experimentColl; assert .commandWorked(experimentColl.createIndex({a: 1})); assert (s.adminCommand({shardcollection: "test.experimentColl" , key: {a: 1}})); // Now split the and move the data between the shards assert (s.adminCommand({split: "test.experimentColl" , middle: {a: 0}})); assert (s.adminCommand({ moveChunk: "test.experimentColl" , find: {a: 1}, to: s.getOther(s.getPrimaryShard( "test" )).name, _waitForDelete: true })); assert .commandWorked(experimentColl.insert([ { "_id" : 0, "m" : NumberInt(0), "a" : NumberInt(0), }, { "_id" : 1, "m" : NumberInt(0), "a" : NumberInt(10), }, { "_id" : 2, "m" : NumberInt(0), "a" : NumberInt(-10), } ])) const q = [ { "$sort" : { "m" : 1 } }, { "$addFields" : { "a" : NumberInt(0) } }, { "$project" : { "_id" : 0, "a" : 1 } } ] experimentColl.aggregate(q).toArray() // Internal error: document does not have $sortKey s.stop();