func main() {
var (
mongoSession *mgo.Session
database *mgo.Database
collection *mgo.Collection
changeInfo *mgo.ChangeInfo
err error
)
if mongoSession, err = mgo.Dial("localhost"); err != nil {
panic(err)
}
database = mongoSession.DB("mgo_examples_03")
collection = database.C("todos")
// START OMIT
var todo = Todo{
Id: bson.NewObjectId(),
Task: "Demo mgo",
Created: time.Now(),
}
// This is a shortcut to collection.Upsert(bson.M{"_id": todo.id}, &todo)
if changeInfo, err = collection.UpsertId(todo.Id, &todo); err != nil {
panic(err)
}
// END OMIT
fmt.Printf("Todo: %# v", pretty.Formatter(todo))
fmt.Printf("Change Info: %# v", pretty.Formatter(changeInfo))
}
func main() {
var (
mongoSession *mgo.Session
database *mgo.Database
collection *mgo.Collection
err error
)
if mongoSession, err = mgo.Dial("localhost"); err != nil {
panic(err)
}
database = mongoSession.DB("mgo_examples_05")
collection = database.C("todos")
var todos []Todo
todos = append(todos, Todo{Id: bson.NewObjectId(), Task: "First task for today", Created: time.Now(), Due: time.Now().Add(time.Hour * 24)})
todos = append(todos, Todo{Id: bson.NewObjectId(), Task: "Second task for today", Created: time.Now(), Due: time.Now()})
todos = append(todos, Todo{Id: bson.NewObjectId(), Task: "Third task for today", Created: time.Now(), Due: time.Now()})
todos = append(todos, Todo{Id: bson.NewObjectId(), Task: "Fourth task for today", Created: time.Now(), Due: time.Now()})
todos = append(todos, Todo{Id: bson.NewObjectId(), Task: "Fifth task for today", Created: time.Now(), Due: time.Now()})
for _, todo := range todos {
if _, err = collection.UpsertId(todo.Id, &todo); err != nil {
panic(err)
}
}
// START OMIT
pipeline := []bson.M{
{"$group": bson.M{
"_id": bson.M{"$dayOfYear": "$d"},
"count": bson.M{"$sum": 1},
}},
}
var (
result TodoDueCounts
results []TodoDueCounts
)
iter := collection.Pipe(pipeline).Iter()
for {
if iter.Next(&result) {
results = append(results, result)
} else {
break
}
}
err = iter.Err()
if err != nil {
panic(err)
}
// END OMIT
fmt.Printf("%# v", pretty.Formatter(results))
}
