func (m *Man) BeforeUpdate(tx *gorm.DB) (err error) {
	if !tx.Statement.Changed("age") {
		return nil
	}
	return nil
}

func TestSubModel(t *testing.T) {
	man := Man{Age: 18, Name: "random-name"}
	if err := DB.Create(&man).Error; err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	if err := DB.Model(&man).Where("id = ?", man.ID).Updates(struct {
		Age int

)

func init() {
	var err error
	if DB, err = OpenTestConnection(&gorm.Config{}); err != nil {
		log.Printf("failed to connect database, got error %v", err)
		os.Exit(1)
	} else {
		sqlDB, err := DB.DB()
		if err != nil {
			log.Printf("failed to connect database, got error %v", err)
			os.Exit(1)
		}

		err = sqlDB.Ping()
		if err != nil {
			log.Printf("failed to ping sqlDB, got error %v", err)

		return
	}

	stat, err := GlobalKMS.Status(ctx)
	if err != nil {
		writeCustomErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrInternalError), err.Error(), r.URL)
		return
	}
	resp, err := json.Marshal(stat)
	if err != nil {
		writeCustomErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrInternalError), err.Error(), r.URL)
		return
	}
	writeSuccessResponseJSON(w, resp)
}

	switch r.Code {
	case dsync.RespLockConflict, dsync.RespLockNotFound, dsync.RespOK:
	// no error
	case dsync.RespLockNotInitialized:
		err = errLockNotInitialized
	default:
		err = errors.New(r.Err)
	}
	return ok, err
}

// RLock calls read lock REST API.
func (c *lockRESTClient) RLock(ctx context.Context, args dsync.LockArgs) (reply bool, err error) {
	return c.call(ctx, lockRPCRLock, &args)
}

// Lock calls lock REST API.

	}

	err = obj.MakeBucket(context.Background(), "abc", MakeBucketOptions{})
	if err != nil {
		// Failed to create newbucket, abort.
		t.Fatalf("%s : %s", instanceType, err.Error())
	}

	resN, err := obj.NewMultipartUpload(context.Background(), "abc", "def", opts)
	if err != nil {
		// Failed to create NewMultipartUpload, abort.
		t.Fatalf("%s : %s", instanceType, err.Error())
	}

			if err != nil {
				err = msgp.WrapError(err, "ReplicatedSize")
				return
			}
		case "ReplicaSize":
			z.ReplicaSize, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "ReplicaSize")
				return
			}
		case "FailStats":
			err = z.FailStats.DecodeMsg(dc)
			if err != nil {
				err = msgp.WrapError(err, "FailStats")
				return
			}
		case "Failed":

							Host:           nerr.Host.String(),
							Err:            nerr.Err.Error(),
							CurrentVersion: Version,
							UpdatedVersion: lrTime.Format(MinioReleaseTagTimeLayout),
						}
					}
				}
			}
		}
		prs := peerResults[local]
		if prs.Err == "" {
			if err = commitBinary(); err != nil {
				prs.Err = err.Error()
			}
			peerResults[local] = prs
		}
	}

	credentials auth.Credentials, t *testing.T,
) {
	_, err := obj.PutObject(GlobalContext, bucketName, "test-object", mustGetPutObjReader(t, bytes.NewReader([]byte{}), int64(0), "", "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"), ObjectOptions{})
	// if object upload fails stop the test.
	if err != nil {
		t.Fatalf("Error uploading object: <ERROR> %v", err)
	}

	v := allTierStats{}
	bts, err := v.MarshalMsg(nil)
	if err != nil {
		t.Fatal(err)
	}
	left, err := v.UnmarshalMsg(bts)
	if err != nil {
		t.Fatal(err)
	}
	if len(left) > 0 {
		t.Errorf("%d bytes left over after UnmarshalMsg(): %q", len(left), left)
	}

	left, err = msgp.Skip(bts)
	if err != nil {
		t.Fatal(err)
	}
	if len(left) > 0 {

			if err != nil {
				err = msgp.WrapError(err, "StartTime")
				return
			}
		case "ss":
			z.StartSize, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "StartSize")
				return
			}
		case "ts":
			z.TotalSize, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "TotalSize")
				return
			}
		case "cs":
			z.CurrentSize, err = dc.ReadInt64()