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Support _id aggregation operators for $group stage #3096

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merged 19 commits into from
Jul 26, 2023
+326 −112
Merged

Support _id aggregation operators for $group stage #3096

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Merge branch 'main' into aggregation-group-id-operators-2964
mergify[bot] Jul 26, 2023
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tests
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@noisersup
noisersup committed Jul 24, 2023
commit acd30463be3fa41d93bfceb45b55c8f3d005308c
52 changes: 51 additions & 1 deletion integration/aggregate_documents_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -94,7 +94,7 @@ func TestAggregateGroupErrors(t *testing.T) {
altMessage string // optional, alternative error message for FerretDB, ignored if empty
skip string // optional, skip test with a specified reason
}{
"StageGroupUnaryOperatorSum": {
"GroupUnaryOperatorSum": {
pipeline: bson.A{
bson.D{{"$group", bson.D{{"sum", bson.D{{"$sum", bson.A{}}}}}}},
},
Expand All @@ -105,6 +105,56 @@ func TestAggregateGroupErrors(t *testing.T) {
},
altMessage: "The $sum accumulator is a unary operator",
},
"GroupTypeEmpty": {
pipeline: bson.A{
bson.D{{"$group", bson.D{{"v", bson.D{}}}}},
},
err: &mongo.CommandError{
Code: 40234,
Name: "Location40234",
Message: "The field 'v' must be an accumulator object",
},
},
"GroupTwoOperators": {
pipeline: bson.A{
bson.D{{"$group", bson.D{{"_id", bson.D{{"$type", int32(42)}, {"$op", int32(42)}}}}}},
},
err: &mongo.CommandError{
Code: 15983,
Name: "Location15983",
Message: "An object representing an expression must have exactly one field: { $type: 42, $op: 42 }",
},
},
"GroupTypeInvalidLen": {
pipeline: bson.A{
bson.D{{"$group", bson.D{{"_id", bson.D{{"$type", bson.A{"foo", "bar"}}}}}}},
},
err: &mongo.CommandError{
Code: 16020,
Name: "Location16020",
Message: "Expression $type takes exactly 1 arguments. 2 were passed in.",
},
},
"GroupNonExistentOperator": {
pipeline: bson.A{
bson.D{{"$group", bson.D{{"_id", bson.D{{"$non-existent", "foo"}}}}}},
},
err: &mongo.CommandError{
Code: 168,
Name: "InvalidPipelineOperator",
Message: "Unrecognized expression '$non-existent'",
},
},
"GroupRecursiveNonExistentOperator": {
pipeline: bson.A{
bson.D{{"$group", bson.D{{"_id", bson.D{{"$type", bson.D{{"$non-existent", "foo"}}}}}}}},
},
err: &mongo.CommandError{
Code: 168,
Name: "InvalidPipelineOperator",
Message: "Unrecognized expression '$non-existent'",
},
},
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} {
name, tc := name, tc
t.Run(name, func(t *testing.T) {
Expand Down