Golang reflections.SetField函數代碼示例

func (r *Row) Bind(x interface{}, strategy map[string]string) error {

	for src, dest := range strategy {

		data, ok := r.data[src]

		if ok {
			k, err := reflections.GetFieldKind(x, dest)
			if err != nil {
				return err
			}

			switch k {
			case reflect.String:
				{
					reflections.SetField(x, dest, data)
				}
			case reflect.Int64:
				{
					i, err := strconv.ParseInt(data, 10, 64)
					if err != nil {
						return err
					}
					reflections.SetField(x, dest, i)
				}
			case reflect.Ptr:
				{
					value, err := reflections.GetField(x, dest)
					if err != nil {
						return err
					}
					if reflect.TypeOf(value) == typeDec {
						dec, success := new(inf.Dec).SetString(data)
						if !success {
							fmt.Errorf("Could not parse inf.Dec: %s", data)
						}
						reflections.SetField(x, dest, dec)
					}
				}
			case reflect.Struct:
				{
					value, err := reflections.GetField(x, dest)
					if err != nil {
						return err
					}
					if reflect.TypeOf(value) == typeTime {
						date, err := time.ParseInLocation("2006-01-02 15:04:05", data, r.opts.TimeZone)
						if err != nil {
							return err
						}
						reflections.SetField(x, dest, date)
					}
				}
			}
		}
	}

	return nil
}

func (this *CCMomentHandler) LoadModel(moment models.CCMoment) models.Moment {
	fields, _ := reflections.Fields(&models.Moment{})
	//new instance
	momentModel := models.Moment{}

	for i := 0; i < len(fields); i++ {
		has, _ := reflections.HasField(moment, fields[i])
		if has == true {
			fmt.Println("Field Exist------", fields[i])
			if fields[i] == "Volunteer_id" {
				fmt.Println("Volunteer_id Exist------")
				var userObj CCUserHandler
				var volunteerObj CCVolunteerHandler
				var usermodel models.CCUser
				var volunteerModel models.CCVolunteer
				value, err := reflections.GetField(moment, fields[i])

				if err == nil && value != nil {
					str, _ := value.(string)

					volunteerModel, err = volunteerObj.FetchVolunteerForId(str)
					if err == nil {
						fmt.Println("volunteer Exist------", volunteerModel)
						usermodel, err = userObj.FetchUserById(volunteerModel.User_id)
						fmt.Println("User Exist------", usermodel)
						if err == nil {
							responseModel := userObj.LoadModel(usermodel)
							setError := reflections.SetField(&momentModel, fields[i], responseModel) // err != nil
							if setError != nil {
								panic(setError)
							}
						}
					}

				}
			} else {
				value, err := reflections.GetField(moment, fields[i])
				if err == nil {
					fmt.Println("Field Value------", value)
					setError := reflections.SetField(&momentModel, fields[i], value) // err != nil

					if setError != nil {
						panic(setError)
					}

				}
			}

		}

	}
	fmt.Println("Data set to Model --- ", momentModel)
	return momentModel
}

func (this *CCUserHandler) LoadModel(user models.CCUser) models.User {
	fields, _ := reflections.Fields(&models.User{})
	//new instance
	userModel := models.User{}

	for i := 0; i < len(fields); i++ {
		has, _ := reflections.HasField(user, fields[i])
		if has == true {
			fmt.Println("Field Exist------", fields[i])

			value, err := reflections.GetField(user, fields[i])
			if err == nil {
				fmt.Println("Field Value------", value)
				setError := reflections.SetField(&userModel, fields[i], value) // err != nil

				if setError != nil {
					panic(setError)
				}

			}

		}

	}
	fmt.Println("Data set to Model --- ", userModel)
	return userModel
}

func (this *CCEventHandler) LoadModel(event models.CCEvent) models.Event {
	fields, _ := reflections.Fields(&models.Event{})
	//new instance
	eventModel := models.Event{}

	for i := 0; i < len(fields); i++ {
		has, _ := reflections.HasField(event, fields[i])
		if has == true {
			fmt.Println("Field Exist------", fields[i])
			if fields[i] == "Created_by" {
				var userObj CCUserHandler
				var usermodel models.CCUser
				value, err := reflections.GetField(event, fields[i])

				if err == nil && value != nil {
					str, _ := value.(string)
					usermodel, err = userObj.FetchUserById(str)
					if err == nil {
						responseModel := userObj.LoadModel(usermodel)
						setError := reflections.SetField(&eventModel, fields[i], responseModel) // err != nil
						if setError != nil {
							panic(setError)
						}
					}
				}
			} else {
				value, err := reflections.GetField(event, fields[i])
				if err == nil {
					fmt.Println("Field Value------", value)
					setError := reflections.SetField(&eventModel, fields[i], value) // err != nil

					if setError != nil {
						panic(setError)
					}
				}
			}

		}

	}
	fmt.Println("Data set to Model --- ", eventModel)
	return eventModel
}

func (D *DayOfWeekCalls) PopulateHoursByDays(results []HourByDaysRecord) {
	for i := 0; i < len(results); i++ {
		hourName := fmt.Sprintf("H%d", i)

		dayName := fmt.Sprintf("Day%d", D.DayOfWeek-1)

		valueHour, _ := reflections.GetField(D.SummaryCallsPerHours, hourName)

		_ = reflections.SetField(&results[i], dayName, valueHour)
	}
}

func ExampleSetField() {
	s := MyStruct{
		FirstField:  "first value",
		SecondField: 2,
		ThirdField:  "third value",
	}

	// In order to be able to set the structure's values,
	// a pointer to it has to be passed to it.
	err := reflections.SetField(&s, "FirstField", "new value")
	if err != nil {
		log.Fatal(err)
	}

	// If you try to set a field's value using the wrong type,
	// an error will be returned
	err = reflections.SetField(&s, "FirstField", 123) // err != nil
	if err != nil {
		log.Fatal(err)
	}
}

func hookDisableWebpage(payload interface{}, nv *bool) {
	if nv != nil {
		has, _ := reflections.HasField(payload, "DisableWebPagePreview")
		if has {
			value, _ := reflections.GetField(payload, "DisableWebPagePreview")
			bvalue := value.(*bool)
			if bvalue == nil {
				reflections.SetField(payload, "DisableWebPagePreview", nv)
			}
		}
	}
}

func hookReplyToMessageID(payload interface{}, nv *bool) {
	if nv != nil {
		has, _ := reflections.HasField(payload, "ReplyToMessageID")
		if has {
			value, _ := reflections.GetField(payload, "ReplyToMessageID")
			bvalue := value.(*int)
			if bvalue == nil {
				reflections.SetField(payload, "ReplyToMessageID", nv)
			}
		}
	}
}

func hookSelective(payload interface{}, nv *bool) {
	if nv != nil {
		has, _ := reflections.HasField(payload, "Selective")
		if has {
			value, _ := reflections.GetField(payload, "Selective")
			bvalue := value.(*bool)
			if bvalue == nil {
				reflections.SetField(payload, "Selective", nv)
			}
		}
	}
}

func hookOneTimeKeyboard(payload interface{}, nv *bool) {
	if nv != nil {
		has, _ := reflections.HasField(payload, "OneTimeKeyboard")
		if has {
			value, _ := reflections.GetField(payload, "OneTimeKeyboard")
			bvalue := value.(*bool)
			if bvalue == nil {
				reflections.SetField(payload, "OneTimeKeyboard", nv)
			}
		}
	}
}

// HandleStructField sets the value for the given supported struct field.
func (dc *DeepCopier) HandleStructField(options *FieldOptions) error {
	f, err := reflections.GetField(dc.Source, options.SourceField)
	if err != nil {
		return err
	}

	switch v := f.(type) {
	case pq.NullTime:
		if v.Valid {
			if err := reflections.SetField(dc.Destination, options.DestinationField, &v.Time); err != nil {
				return err
			}
		}
	case time.Time:
		if err := reflections.SetField(dc.Destination, options.DestinationField, v); err != nil {
			return err
		}
	}

	return nil
}

func (s *UserStore) UpdateUser(user *User, changes map[string]interface{}) (err error) {
	u := s.ByName(user.Username)
	u.mux.Lock()
	for k, v := range changes {
		err = reflections.SetField(u, k, v)
	}
	u.mux.Unlock()

	if err != nil {
		return err
	}

	s.save()
	return nil
}

func setProperty(obj interface{}, prop string, val interface{}) error {
	if reflect.TypeOf(obj).Kind() == reflect.Map {

		value := reflect.ValueOf(obj)
		value.SetMapIndex(reflect.ValueOf(prop), reflect.ValueOf(val))
		return nil
	}

	if reflect.TypeOf(obj).Kind() != reflect.Ptr {
		return errors.New("Object must be a pointer to a struct")
	}
	prop = strings.Title(prop)

	return reflections.SetField(obj, prop, val)
}

// OverrideWith will override the Environment values
// according to a provided key-value map.
func (e *Environment) OverrideWith(data map[string]string) error {
	for field, value := range data {
		has, err := reflections.HasField(*e, field)
		if !has {
			errMsg := fmt.Sprintf("No such field %s in Environement struct",
				field)
			return errors.New(errMsg)
		} else if err != nil {
			return err
		}

		if value != "" {
			reflections.SetField(e, field, value)
		}
	}

	return nil
}

func (d *Dsn) SetDefaults(defaults map[string]string) error {
	for k, v := range defaults {
		// Check the dsn struct has field
		value, err := reflections.GetField(d, k)
		if err != nil {
			return err
		}

		// If dsn instance field is set to zero value,
		// then override it with provided default value
		if value == "" {
			err := reflections.SetField(d, k, v)
			if err != nil {
				return err
			}
		}
	}

	return nil
}