| err = coll.FindOne(context.TODO(), bson.D{{"firstName", Mike}}).Decode(&result) |
[{firstName Mike}, {lastName Smith} ...] |
|
| cursor, err := coll.Find(context.TODO(), bson.D{{"age", bson.D{{"$gte", 46}}}}) |
[{firstName Kyle}, {age 51}, ... ] | [{firstName Omar}, {age 47}, ... ] |
|
| result, err := coll.InsertOne( | context.TODO(), | bson.D{ | {"animal", "Dog"}, | {"breed", "Beagle"} | } | ) |
|
Insert Multiple Documents
| docs := []interface{} { | bson.D{{"firstName", "Erik"}, {"age", 27}}, | bson.D{{"firstName", "Mohammad"}, {"lastName", "Ahmad"}, {"age", 10}}, | bson.D{{"firstName", "Todd"}}, | bson.D{{"firstName", "Juan"}, {"lastName", "Pablo"}} | } | | result, err := coll.InsertMany(context.TODO(), docs) |
|
| result, err := coll.UpdateOne( | context.TODO(), | bson.D{{"firstName", "Erik"}}, | bson.D{{"$set", bson.D{{"age", 28}}}} | ) | fmt.Printf("The number of modified documents: %d\n", result.ModifiedCount) |
The number of modified documents: 1 |
|
Update Multiple Documents
| result, err := coll.UpdateMany( | context.TODO(), | bson.D{{"age", bson.D{{"$gte", 58}}}}, | bson.D{{"$set", bson.D{{"description", "Senior"}}}} | ) | fmt.Printf("The number of modified documents: %d\n", result.ModifiedCount) |
The number of modified documents: 4 |
|
Update Arrays in Documents
| result, err := coll.UpdateMany( | context.TODO(), | bson.D{}, | bson.D{{"$push", bson.D{{family, "brother"}}}} | ) |
[{firstName Xiao}, {family ["brother"]}, ... ] | [{firstName Omar}, {family ["brother", "mother"]}, ... ] | ... |
|
| result, err := coll.ReplaceOne( | context.TODO(), | bson.D{{"firstName", "Mick"}}, | bson.D{{"firstName", "Mike"}, {"lastName", "Doe"}} | ) |
[{{firstName Mike}, {lastName Doe} }] |
|
| result, err := coll.DeleteOne( | context.TODO(), | bson.D{{"firstName", "Xiao"}} | ) |
|
Delete Multiple Documents
| results, err := coll.DeleteMany( | context.TODO(), | bson.D{{"age", bson.D{{"$lte", 12}}}} | ) |
|
| models := []mongo.WriteModel{ | mongo.NewInsertOneModel().SetDocument(bson.D{{"firstName", "John"}, {"age", 5}}), | mongo.NewUpdateOneModel().SetFilter(bson.D{{"firstName", "Juan"}}). | SetUpdate(bson.D{{"$set", bson.D{{"age", 12}}}}), | } | opts := options.BulkWrite().SetOrdered(true) | | results, err := coll.BulkWrite(context.TODO(), models, opts) |
[{firstName John}, {age 5} ... ] | [{firstName Juan}, {age 12} ... ] |
|
| pipeline := mongo.Pipeline{bson.D{{"$match", bson.D{{"operationType", "insert"}}}}} | cs, err := coll.Watch(context.TODO(), pipeline) |
|
Access Data from a Cursor Iteratively
| cursor, err := coll.Find(context.TODO(), bson.D{}) | | for cursor.Next(context.TODO()) { | var result bson.D | if err := cursor.Decode(&result); err != nil { | log.Fatal(err) | } | fmt.Println(result) | } |
[{firstName Doug} ... ] | [{firstName Erik} ...] | [{lastName Chang} ...] | ... |
|
Access Data from a Cursor as an Array
| cursor, err := coll.Find(context.TODO(), bson.D{}) | | var results []bson.D | if err = cursor.All(context.TODO(), &results); err != nil { | panic(err) | } |
[{name Mike} ... ] | [{name Edgar} ...] | [{name Freddie} ...] | ... |
|
| count, err := coll.CountDocuments(context.TODO(), bson.D{}) |
|
List the Distinct Documents or Field Values | var results []string | err = coll.Distinct(context.TODO(), "firstName", bson.D{}).Decode(&results) |
|
Limit the Number of Documents Retrieved
| cursor, err := coll.Find(context.TODO(), bson.D{}, options.Find().SetLimit(2)) |
[{breed Beagle} ... ] | [{breed German Shepard} ...] |
|
| | cursor, err := coll.Find(context.TODO(), bson.D{}, options.Find().SetSkip(4)) |
[{item Pen} ... ] | [{item Chair} ...] |
|
Sort the Documents When Retrieving Them
| cursor, err := coll.Find(context.TODO(), bson.D{}, options.Find().SetSort(bson.D{{"age", 1}})) |
[{firstName Dev} {age 5} ... ] | [{firstName Jose} {age 7} ... ] | [{firstName Om} {age 8} ... ] |
|
Project Document Fields When Retrieving Them
| cursor, err := coll.Find( | context.TODO(), | bson.D{}, | options.Find().SetProjection( | bson.D{{"age", 0}, {"_id",0}} | ) | ) |
[{firstName Lester}] | [{firstName Wendall} {lastName Griffin}] | ... |
|
| model := mongo.IndexModel{Keys: bson.D{{"firstName", 1}, {"lastName", -1}}} | name, err := coll.Indexes().CreateOne(context.TODO(), model) |
|
| | cursor, err := coll.Find(context.TODO(), bson.D{{"$text", bson.D{{"$search", "beagle"}}}}) |
[{"firstName": "Emily" , "Description": "I love to play sports and walk my beagle."} ... ] |
|