This piece of code will query a MongoDB database collection

queryDB.go

c := exampleCollection.FindOne(ctx, bson.M{"_id": r.InsertedID})
var exampleResult bson.M 
c.Decode(&exampleResult)

fmt.Printf("\nItem with ID: %v contains the following:\n", exampleResult["_id"]) 
fmt.Println("someString:", exampleResult["someString"]) 
fmt.Println("someInteger:", exampleResult["someInteger"]) 
fmt.Println("someStringSlice:", exampleResult["someStringSlice"])

filter := bson.D{{"someInteger", bson.D{{"$lt", 60}}}} 
examplesGT50, err := exampleCollection.Find(ctx, filter)
if err != nil { 
	panic(err) 
}
var examplesResult []bson.M 
if err = examplesGT50.All(ctx, &examplesResult); err != nil { 
	panic(err) 
}

for _, e := range examplesResult { 
	fmt.Printf("\nItem with ID: %v contains the following:\n", e["_id"]) 
	fmt.Println("someString:", e["someString"]) 
	fmt.Println("someInteger:", e["someInteger"]) 
	fmt.Println("someStringSlice:", e["someStringSlice"]) 
}

time.Sleep(20 * time.Second)