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Error getting aggregate

See original GitHub issue

Is the command aggregate not implemented?

com.mongodb.MongoCommandException: Command failed with error 59: 'no such cmd: aggregate' on server localhost:27117. The full response is { "$err" : "no such cmd: aggregate", "errmsg" : "no such cmd: aggregate", "code" : 59, "bad cmd" : { "aggregate" : "devices", "pipeline" : [{ "$match" : { } }, { "$project" : { "_id" : 1 } }, { "$group" : { "_id" : null, "ids" : { "$addToSet" : "$_id" } } }], "cursor" : { } }, "ok" : 0 }

Issue Analytics

  • State:closed
  • Created 5 years ago
  • Comments:15 (11 by maintainers)

github_iconTop GitHub Comments

bwaldvogelcommented, Nov 4, 2018

I’ve started to work on an initial version of the aggregation pipeline. It currently supports simple use cases such as matching and grouping with $sum (SumAccumulator), $min (MinAccumulator) and $max (MaxAccumulator) accumulators.

Next steps could be:

  • ~Implement grouping by non-null keys~ done in f9cd8141a4ff6f7bc871580e36085376a785e7ce
  • Implement other pipeline stages such as ~$project~(ecaf59daaece55d1496a84a46e1224f5fdf05eeb), ~$sort~(21864a30172a153d02d14744483b5636293c58a0) or ~$count~(2a0e2d36e97bb8f1c2b734c3b8e2404e900ef4df)
  • Implement other group accumulator operators such as ~$avg~(a34e2b776f99ce5b52294ee8cf9dac5e930a9b17), ~$first~(42f2ccce3074b39517df3d68df46b5cc793f8ac4), ~$last~(42f2ccce3074b39517df3d68df46b5cc793f8ac4) or ~$addToSet~(f7095f453e0a813a4f790aef877fd3b3192e17ea)
bwaldvogelcommented, Oct 20, 2018

@vepo Are you interested in contributing? 😃

Read more comments on GitHub >

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