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Merge pull request #23 from jiangz222/aggregate
support aggregate
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| package qmgo | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "go.mongodb.org/mongo-driver/bson" | ||
| "go.mongodb.org/mongo-driver/mongo" | ||
| ) | ||
|
|
||
| type Pipeline []bson.D | ||
|
|
||
| type Aggregate struct { | ||
| ctx context.Context | ||
| pipeline interface{} | ||
| collection *mongo.Collection | ||
| } | ||
|
|
||
| // All iterates the cursor from aggregate and decodes each document into results. | ||
| func (a *Aggregate) All(results interface{}) error { | ||
| c, err := a.collection.Aggregate(a.ctx, a.pipeline) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return c.All(a.ctx, results) | ||
| } | ||
|
|
||
| // One iterates the cursor from aggregate and decodes current document into result. | ||
| func (a *Aggregate) One(result interface{}) error { | ||
| c, err := a.collection.Aggregate(a.ctx, a.pipeline) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| cr := Cursor{ | ||
| ctx: a.ctx, | ||
| cursor: c, | ||
| err: err, | ||
| } | ||
| defer cr.Close() | ||
| if !cr.Next(result) { | ||
| return ERR_NO_SUCH_RECORD | ||
| } | ||
| return err | ||
| } | ||
|
|
||
| // Iter return the cursor after aggregate | ||
| func (a *Aggregate) Iter() CursorI { | ||
| c, err := a.collection.Aggregate(a.ctx, a.pipeline) | ||
| return &Cursor{ | ||
| ctx: a.ctx, | ||
| cursor: c, | ||
| err: err, | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| package qmgo | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "testing" | ||
|
|
||
| "github.com/stretchr/testify/require" | ||
| "go.mongodb.org/mongo-driver/bson" | ||
| "go.mongodb.org/mongo-driver/bson/primitive" | ||
| ) | ||
|
|
||
| func TestAggregate(t *testing.T) { | ||
| ast := require.New(t) | ||
|
|
||
| var cli *QmgoClient | ||
|
|
||
| cli = initClient("test") | ||
| cli.DropCollection(context.Background()) | ||
| cli.EnsureIndexes(context.Background(), nil, []string{"name"}) | ||
|
|
||
| id1 := primitive.NewObjectID() | ||
| id2 := primitive.NewObjectID() | ||
| id3 := primitive.NewObjectID() | ||
| id4 := primitive.NewObjectID() | ||
| id5 := primitive.NewObjectID() | ||
| docs := []interface{}{ | ||
| QueryTestItem{Id: id1, Name: "Alice", Age: 10}, | ||
| QueryTestItem{Id: id2, Name: "Alice", Age: 12}, | ||
| QueryTestItem{Id: id3, Name: "Lucas", Age: 33}, | ||
| QueryTestItem{Id: id4, Name: "Lucas", Age: 22}, | ||
| QueryTestItem{Id: id5, Name: "Lucas", Age: 44}, | ||
| } | ||
| cli.InsertMany(context.Background(), docs) | ||
| matchStage := bson.D{{"$match", []bson.E{{"age", bson.D{{"$gt", 11}}}}}} | ||
| groupStage := bson.D{{"$group", bson.D{{"_id", "$name"}, {"total", bson.D{{"$sum", "$age"}}}}}} | ||
| var showsWithInfo []bson.M | ||
| // aggregate ALL() | ||
| err := cli.Aggregate(context.Background(), Pipeline{matchStage, groupStage}).All(&showsWithInfo) | ||
| ast.NoError(err) | ||
| ast.Equal(2, len(showsWithInfo)) | ||
| for _, v := range showsWithInfo { | ||
| if "Alice" == v["_id"] { | ||
| ast.Equal(int32(12), v["total"]) | ||
| continue | ||
| } | ||
| if "Lucas" == v["_id"] { | ||
| ast.Equal(int32(99), v["total"]) | ||
| continue | ||
| } | ||
| ast.Error(errors.New("error"), "impossible") | ||
| } | ||
| // Iter() | ||
| iter := cli.Aggregate(context.Background(), Pipeline{matchStage, groupStage}) | ||
| ast.NotNil(iter) | ||
| err = iter.All(&showsWithInfo) | ||
| ast.NoError(err) | ||
| for _, v := range showsWithInfo { | ||
| if "Alice" == v["_id"] { | ||
| ast.Equal(int32(12), v["total"]) | ||
| continue | ||
| } | ||
| if "Lucas" == v["_id"] { | ||
| ast.Equal(int32(99), v["total"]) | ||
| continue | ||
| } | ||
| ast.Error(errors.New("error"), "impossible") | ||
| } | ||
| // One() | ||
| var oneInfo bson.M | ||
|
|
||
| iter = cli.Aggregate(context.Background(), Pipeline{matchStage, groupStage}) | ||
| ast.NotNil(iter) | ||
|
|
||
| err = iter.One(&oneInfo) | ||
| ast.NoError(err) | ||
| ast.Equal(true, oneInfo["_id"] == "Alice" || oneInfo["_id"] == "Lucas") | ||
|
|
||
| // iter | ||
| iter = cli.Aggregate(context.Background(), Pipeline{matchStage, groupStage}) | ||
| ast.NotNil(iter) | ||
|
|
||
| i := iter.Iter() | ||
|
|
||
| ct := i.Next(&oneInfo) | ||
| ast.Equal(true, oneInfo["_id"] == "Alice" || oneInfo["_id"] == "Lucas") | ||
| ast.Equal(true, ct) | ||
| ct = i.Next(&oneInfo) | ||
| ast.Equal(true, oneInfo["_id"] == "Alice" || oneInfo["_id"] == "Lucas") | ||
| ast.Equal(true, ct) | ||
| ct = i.Next(&oneInfo) | ||
| ast.Equal(false, ct) | ||
|
|
||
| // err | ||
| ast.Error(cli.Aggregate(context.Background(), 1).All(&showsWithInfo)) | ||
| ast.Error(cli.Aggregate(context.Background(), 1).One(&showsWithInfo)) | ||
| ast.Error(cli.Aggregate(context.Background(), 1).Iter().Err()) | ||
| matchStage = bson.D{{"$match", []bson.E{{"age", bson.D{{"$gt", 100}}}}}} | ||
| groupStage = bson.D{{"$group", bson.D{{"_id", "$name"}, {"total", bson.D{{"$sum", "$age"}}}}}} | ||
| ast.Error(cli.Aggregate(context.Background(), Pipeline{matchStage, groupStage}).One(&showsWithInfo)) | ||
|
|
||
| } |
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