default:
		m = cache.iamUsersMap
	}
	err := store.loadUser(ctx, accessKey, userType, m)

	if err == errNoSuchUser {
		// User was deleted - we update the cache.
		delete(m, accessKey)

		// Since cache was updated, we update the timestamp.
		defer func() {
			cache.updatedAt = time.Now()
		}()

		// 1. Start with updating user-group memberships

		for _, erObj := range z.sets {
			resultIndex++
			wg.Add(1)
			go func(i int, erObj *erasureObjects) {
				updates := make(chan dataUsageCache, 1)
				defer xioutil.SafeClose(updates)
				// Start update collector.
				go func() {
					defer wg.Done()
					for info := range updates {
						mu.Lock()
						results[i] = info
						mu.Unlock()
					}
				}()
				// Start scanner. Blocks until done.

type IAMUserType int

const (
	unknownIAMUserType IAMUserType = iota - 1
	regUser
	stsUser
	svcUser
)

// LoadGroup - loads a specific group from storage, and updates the
// memberships cache. If the specified group does not exist in
// storage, it is removed from in-memory maps as well - this
// simplifies the implementation for group removal. This is called
// only via IAM notifications.

	defer func() {
		res := make(map[string]string)
		if err != nil {
			res["err"] = err.Error()
		}
		stopFn(res)
	}()

	// Updates must be closed before we return.
	defer xioutil.SafeClose(updates)
	var lc *lifecycle.Lifecycle

	// Check if the current bucket has a configured lifecycle policy
	if globalLifecycleSys != nil {
		lc, err = globalLifecycleSys.Get(cache.Info.Name)

// update metadata.
func (er erasureObjects) CopyObject(ctx context.Context, srcBucket, srcObject, dstBucket, dstObject string, srcInfo ObjectInfo, srcOpts, dstOpts ObjectOptions) (oi ObjectInfo, err error) {
	if !dstOpts.NoAuditLog {
		auditObjectErasureSet(ctx, dstObject, &er)
	}

	// This call shouldn't be used for anything other than metadata updates or adding self referential versions.

	if idx < 0 || idx >= len(x.versions) {
		return errFileNotFound
	}
	update := &x.versions[idx]
	prevMod := update.header.ModTime
	update.meta, err = ver.MarshalMsg(update.meta[:0:len(update.meta)])
	if err != nil {
		update.meta = nil
		return err
	}
	update.header = ver.header()
	if prevMod != update.header.ModTime {
		x.sortByModTime()
	}
	return nil
}

    /**
     * The number of live elements in this segment's region. This does not include unset elements
     * which are awaiting cleanup.
     */
    volatile int count;

    /**
     * Number of updates that alter the size of the table. This is used during bulk-read methods to
     * make sure they see a consistent snapshot: If modCounts change during a traversal of segments

		dnsLogIf(GlobalContext, err)
		return
	}

	bucketsSet := set.NewStringSet()
	bucketsToBeUpdated := set.NewStringSet()
	bucketsInConflict := set.NewStringSet()

	// This means that domain is updated, we should update
	// all bucket entries with new domain name.
	domainMissing := err == dns.ErrDomainMissing
	if dnsBuckets != nil {
		for _, bucket := range buckets {
			bucketsSet.Add(bucket.Name)

  optional FieldsV1 fieldsV1 = 7;

  // Subresource is the name of the subresource used to update that object, or
  // empty string if the object was updated through the main resource. The
  // value of this field is used to distinguish between managers, even if they
  // share the same name. For example, a status update will be distinct from a
  // regular update using the same manager name.

	}
}

func TestScanNullValue(t *testing.T) {
	user := GetUser("scan_null_value", Config{})
	DB.Create(&user)

	if err := DB.Model(&user).Update("age", nil).Error; err != nil {
		t.Fatalf("failed to update column age for struct, got error %v", err)
	}

	var result User
	if err := DB.First(&result, "id = ?", user.ID).Error; err != nil {