Golang DB.Save方法代碼示例

func taskDropGoal(db data.DB, u *models.User, eventData map[string]interface{}) {
	g, err := tag.ForName(db, u, tag.Goal)
	if err != nil {
		log.Printf("agents.taskDropGoal Error: %s", err)
		return
	}

	id, err := db.ParseID(eventData["task_id"].(string))
	if err != nil {
		log.Printf("agents.taskDropGoal Error: %s", err)
		return
	}

	t, err := models.FindTask(db, id)
	if err != nil {
		log.Printf("agents.taskMakeGoal Error: %s", err)
		return
	}

	t.ExcludeTag(g)

	if err := db.Save(t); err != nil {
		log.Printf("agents.taskMakeGoal Error: %s", err)
		return
	}
}

func createFixture(ui cli.Ui, ownerID string, db data.DB) (fixture *models.Fixture, err error) {
	ui.Output("Creating a fixture")

	fixture = models.NewFixture()
	fixture.SetID(db.NewID())
	fixture.OwnerId = ownerID
	fixture.CreatedAt = time.Now()

	if fixture.Name, err = stringInput(ui, "Name of the fixture:"); err != nil {
		return
	}

	if fixture.Label, err = boolInput(ui, "Is this a label?"); err != nil {
		return
	}

	if !fixture.Label {
		if fixture.StartTime, err = timeInput(ui, "Start time of fixture?"); err != nil {
			return
		}

		if fixture.EndTime, err = timeInput(ui, "End time of fixture?"); err != nil {
			return
		}
	}

	fixture.UpdatedAt = time.Now()

	err = db.Save(fixture)
	return
}

func newTestUserX(t *testing.T, db data.DB) *models.User {
	u := new(models.User)
	u.SetID(db.NewID())
	if err := db.Save(u); err != nil {
		t.Fatalf("Error newTestUserX: %s", err)
	}
	return u
}

func newTestUser(t *testing.T, db data.DB) *oldmodels.User {
	u := oldmodels.NewUser()
	u.SetID(db.NewID())
	u.CreatedAt = time.Now()
	u.UpdatedAt = time.Now()
	if err := db.Save(u); err != nil {
		t.Fatalf("Error newTestUser: %s", err)
	}
	return u
}

func newTestTag(t *testing.T, db data.DB, u *models.User) *models.Tag {
	tg := models.NewTag()
	tg.SetID(db.NewID())
	tg.SetOwner(u)

	if err := db.Save(tg); err != nil {
		t.Fatal(err)
	}

	return tg
}

func newTestTask(t *testing.T, db data.DB, u *models.User) *models.Task {
	tsk := new(models.Task)
	tsk.SetID(db.NewID())
	tsk.CreatedAt = models.TimestampFrom(time.Now())
	tsk.OwnerId = u.ID().String()
	tsk.UpdatedAt = models.TimestampFrom(time.Now())
	if err := db.Save(tsk); err != nil {
		t.Fatalf("Error newTestTask: %s", err)
	}
	return tsk
}

func newTestNote(t *testing.T, db data.DB, u *models.User) *models.Note {
	note := models.NewNote()
	note.SetID(db.NewID())
	note.CreatedAt = time.Now()
	note.OwnerId = u.ID().String()
	note.UpdatedAt = time.Now()
	if err := db.Save(note); err != nil {
		t.Fatal("newTestNote Error: %s", err)
	}
	return note
}

func newTestPerson(t *testing.T, db data.DB, u *models.User) *models.Person {
	person := models.NewPerson()
	person.SetID(db.NewID())
	person.CreatedAt = time.Now()
	person.OwnerId = u.ID().String()
	person.UpdatedAt = time.Now()
	if err := db.Save(person); err != nil {
		t.Fatalf("newTestPerson Error: %s", err)
	}
	return person
}

func newCalendar(db data.DB, userID string) (*models.Calendar, error) {
	cal := models.NewCalendar()

	cal.SetID(db.NewID())
	cal.CreatedAt = time.Now()
	cal.Name = "Main"
	cal.OwnerId = userID
	cal.UpdatedAt = time.Now()

	return cal, db.Save(cal)
}

func locationUpdate(db data.DB, u *models.User, e *models.Event) {
	loc, _ := e.Location(db)
	p, err := user.Profile(db, u)
	if err == data.ErrNotFound {
		p = models.NewProfile()
		p.CreatedAt = time.Now()
		p.UpdatedAt = p.CreatedAt
		p.SetID(db.NewID())
		p.SetOwner(u)
	}
	p.SetLocation(loc)
	db.Save(p)
}

// EventPOST implements gaia's response to a POST request to the '/event/' endpoint.
//
// Assumptions: The user has been authenticated.
//
// Proceedings: Parses the url parameters.
func EventPOST(ctx context.Context, w http.ResponseWriter, r *http.Request, db data.DB, logger services.Logger) {
	l := logger.WithPrefix("EventPOST: ")

	// Parse the form
	if err := r.ParseForm(); err != nil {
		l.Printf("error parsing form: %s", err)
		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
		return
	}

	// Retrieve the tags parameter
	tagNames, ok := r.Form[tagsParam]
	if !ok {
		l.Print("no tags param")
		tagNames = []string{}
	}
	// if any tag names have commas, split those
	tagNames = flatten(mapSplit(tagNames, ","))

	// Retrieve our user
	u, ok := user.FromContext(ctx)
	if !ok {
		l.Print("failed to retrieve user from context")
		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
		return
	}

	e := new(models.Event)

	tags := make([]*models.Tag, len(tagNames))
	for i, n := range tagNames {
		t, err := tag.ForName(db, u, tag.Name(n))
		if err != nil {
			l.Printf("tag.ForName(%q) error: %s", n, err)
			http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
			return
		}
		tags[i] = t
	}

	defer r.Body.Close()
	if requestBody, err := ioutil.ReadAll(r.Body); err != nil {
		l.Printf("ioutil.ReadAll(r.Body) error: %s", err)
		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
		return
	} else if err := json.Unmarshal(requestBody, e); err != nil {
		l.Printf("info: request body:\n%s", string(requestBody))
		l.Printf("error: while unmarshalling request body, %s", err)
		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
		return
	}

	if e.CreatedAt.IsZero() {
		e.CreatedAt = time.Now()
	}
	e.UpdatedAt = time.Now()
	e.SetOwner(u)

	for _, t := range tags {
		e.IncludeTag(t)
	}

	if allowed, err := access.CanCreate(db, u, e); err != nil {
		l.Printf("access.CanCreate(db, u, e) error: %s", err)
		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
		return
	} else if !allowed {
		l.Print("access.CanCreate(db, u, e) rejected authorization")
		http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
		return
	}

	if err := db.Save(u); err != nil {
		l.Printf("error saving record: %s", err)
		switch err {
		case data.ErrAccessDenial:
			http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
		// These are all equally distressing
		case data.ErrNotFound: // TODO shouldn't a not found not be fing impossible for a Save?
			fallthrough
		case data.ErrNoConnection:
			fallthrough
		case data.ErrInvalidID:
		default:
			http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
		}
		return
	}

	// Now we shall write our response
	b, err := json.MarshalIndent(e, "", "    ")
	if err != nil {
		l.Printf("json.MarshalIndent(m, \"\", \"   \") error: %s", err)
		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
		return
//.........這裏部分代碼省略.........

func MobileLocationPOST(ctx context.Context, w http.ResponseWriter, r *http.Request, l services.Logger, db data.DB) {
	// Parse the form value
	if err := r.ParseForm(); err != nil {
		l.Printf("MobileLocationPOST Error: %s", err)
		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
		return
	}

	// Altitude
	alt := r.FormValue(altitudeParam)
	if alt == "" {
		http.Error(w, "You must specify an altitude", http.StatusBadRequest)
		return
	}
	altitude, err := strconv.ParseFloat(alt, 64)
	if err != nil {
		http.Error(w, "Parsing altitude", http.StatusBadRequest)
		return
	}

	// Latitude
	lat := r.FormValue(latitudeParam)
	if lat == "" {
		http.Error(w, "You must specify a latitude", http.StatusBadRequest)
		return
	}
	latitude, err := strconv.ParseFloat(lat, 64)
	if err != nil {
		http.Error(w, "Parsing latitude", http.StatusBadRequest)
		return
	}

	// Longitude
	lon := r.FormValue(longitudeParam)
	if lon == "" {
		http.Error(w, "You must specify an longitude", http.StatusBadRequest)
		return
	}
	longitude, err := strconv.ParseFloat(lon, 64)
	if err != nil {
		http.Error(w, "Parsing longitude", http.StatusBadRequest)
		return
	}

	// Retrieve the user this request was authenticated as
	u, ok := user.FromContext(ctx)
	if !ok { // This is certainly an issue, and should _never_ happen
		l.Print("MobileLocationPOST Error: failed to retrieve user from context")
		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
		return
	}

	// Create location
	loc := location.NewCoords(altitude, latitude, longitude)
	loc.SetID(db.NewID())
	loc.SetOwner(u)

	now := loc.CreatedAt

	e := models.NewEvent()
	e.CreatedAt = now
	e.SetID(db.NewID())
	e.SetOwner(u)
	e.Name = "Location Update"
	e.SetLocation(loc)
	e.Time = now
	e.UpdatedAt = now

	locationTag, err1 := tag.ForName(db, u, tag.Location)
	updateTag, err2 := tag.ForName(db, u, tag.Update)
	mobileTag, err3 := tag.ForName(db, u, tag.Mobile)
	if err1 != nil || err2 != nil || err3 != nil {
		l.Printf("MobileLocationPOST Error: %s", err)
		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
		return
	}
	e.IncludeTag(locationTag)
	e.IncludeTag(updateTag)
	e.IncludeTag(mobileTag)

	if err = db.Save(loc); err != nil {
		l.Printf("MobileLocationPOST Error: %s", err)
		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
		return
	}

	if err = db.Save(e); err != nil {
		l.Printf("MobileLocationPOST Error: %s", err)
		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
		return
	}

	bytes, err := json.MarshalIndent(e, "", "	")
	if err != nil {
		l.Printf("MobileLocationPOST Error: while marshalling json %s", err)
		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
		return
	}

	w.WriteHeader(http.StatusCreated)
//.........這裏部分代碼省略.........