Migrate accessories to user data

- Add user_accessory as the per-user accessory inventory table.
- Migrate old accessory wear records to user-owned accessory ids, including legacy common_accessory_m lookups for old installs.
- Allocate default accessories for newly created users and update accessory reads to use user_accessory at runtime.
- Validate accessory ownership when wearing accessories and keep existing accessory-based responses working.

Signed-off-by: Sean Du <do4suki@gmail.com>

internal/handler/api/profile/info.go

@@ -325,17 +325,7 @@ func getAccessoryInfo(ss *session.Session, targetUserID, unitOwningUserID int) (
 		return nil, nil
 	}
 
-	accessoryData := struct {
-		AccessoryID int `xorm:"accessory_id"`
-		Exp         int `xorm:"exp"`
-	}{}
-	has, err = ss.MainEng.Table("common_accessory_m").
-		Where("accessory_owning_user_id = ?", accessoryOwningID).
-		Cols("accessory_id,exp").
-		Get(&accessoryData)
-	if err != nil {
-		return nil, err
-	}
+	has, accessoryData := ss.GetAccessoryByAccessoryOwningUserID(accessoryOwningID)
 	if !has {
 		return nil, nil
 	}
@@ -345,9 +335,9 @@ func getAccessoryInfo(ss *session.Session, targetUserID, unitOwningUserID int) (
 		AccessoryID:           accessoryData.AccessoryID,
 		Exp:                   accessoryData.Exp,
 		NextExp:               0,
-		Level:                 8,
-		MaxLevel:              8,
-		RankUpCount:           4,
+		Level:                 accessoryData.MaxLevel,
+		MaxLevel:              accessoryData.MaxLevel,
+		RankUpCount:           accessoryData.MaxLevel - accessoryData.DefaultMaxLevel,
 		FavoriteFlag:          true,
 	}, nil
 }

internal/handler/api/unit/accessoryall.go

@@ -12,7 +12,7 @@ func unitAccessoryAll(ctx *gin.Context) (res any, err error) {
 	ss := session.Get(ctx)
 
 	accessoryList := []unitapischema.AccessoryList{}
-	err = ss.MainEng.Table("common_accessory_m").Find(&accessoryList)
+	err = ss.UserEng.Table("user_accessory").Where("user_id = ?", ss.UserID).Find(&accessoryList)
 	if err != nil {
 		return nil, err
 	}

internal/handler/friend/list.go

@@ -178,25 +178,20 @@ func buildCenterUnitInfo(ss *session.Session, userID, unitOwningUserID, awardID
 		return info, err
 	}
 	if has && accessoryWear.AccessoryOwningUserID > 0 {
-		var accessoryID, exp int
-		_, err = ss.MainEng.Table("common_accessory_m").
-			Where("accessory_owning_user_id = ?", accessoryWear.AccessoryOwningUserID).
-			Cols("accessory_id,exp").
-			Get(&accessoryID, &exp)
-		if err != nil {
-			return info, err
-		}
+		hasAccessory, accessoryData := ss.GetAccessoryByAccessoryOwningUserID(accessoryWear.AccessoryOwningUserID)
+		if hasAccessory {
 			accessoryInfo = friendschema.AccessoryInfo{
 				AccessoryOwningUserID: accessoryWear.AccessoryOwningUserID,
-			AccessoryID:           accessoryID,
-			Exp:                   exp,
+				AccessoryID:           accessoryData.AccessoryID,
+				Exp:                   accessoryData.Exp,
 				NextExp:               0,
-			Level:                 8,
-			MaxLevel:              8,
-			RankUpCount:           4,
+				Level:                 accessoryData.MaxLevel,
+				MaxLevel:              accessoryData.MaxLevel,
+				RankUpCount:           accessoryData.MaxLevel - accessoryData.DefaultMaxLevel,
 				FavoriteFlag:          true,
 			}
 		}
+	}
 
 	removableSkillIDs := []int{}
 	err = ss.UserEng.Table(new(usermodel.UserUnitSkillEquip)).

internal/handler/ghome/account/login.go

@@ -290,6 +290,14 @@ func addUser(dbSession *xorm.Session, phone, password string, isDefault bool) (g
 				}
 				return loginData, loginCode, loginMsg, created, err
 			}
+
+			err = usermodel.EnsureUserAccessories(dbSession, db.MainEng, userID, nil)
+			if err != nil {
+				if localSession {
+					dbSession.Rollback()
+				}
+				return loginData, loginCode, loginMsg, created, err
+			}
 		}
 
 		// 检查用户卡组配置

internal/handler/live/live.go

@@ -47,6 +47,7 @@ type memberTagMatchKey struct {
 
 type accessoryBonusRow struct {
 	AccessoryOwningUserID int     `xorm:"accessory_owning_user_id"`
+	AccessoryID           int     `xorm:"accessory_id"`
 	Smile                 float64 `xorm:"smile_max"`
 	Pure                  float64 `xorm:"pure_max"`
 	Cool                  float64 `xorm:"cool_max"`
@@ -219,24 +220,51 @@ func loadAccessoryBonusMap(ss *session.Session, userID int, unitOwningUserIDs []
 	}
 
 	rows := []accessoryBonusRow{}
-	err = ss.MainEng.Table("common_accessory_m").
-		Join("LEFT", "accessory_m", "common_accessory_m.accessory_id = accessory_m.accessory_id").
-		In("common_accessory_m.accessory_owning_user_id", accessoryIDs).
-		Cols("common_accessory_m.accessory_owning_user_id,smile_max,pure_max,cool_max").
+	err = ss.UserEng.Table("user_accessory").
+		In("accessory_owning_user_id", accessoryIDs).
+		Cols("accessory_owning_user_id,accessory_id").
 		Find(&rows)
 	if err != nil {
 		return nil, err
 	}
 
-	accessoryMap := make(map[int]accessoryBonus, len(rows))
+	accessoryIDSet := make(map[int]struct{}, len(rows))
 	for _, row := range rows {
-		accessoryMap[row.AccessoryOwningUserID] = accessoryBonus{
+		accessoryIDSet[row.AccessoryID] = struct{}{}
+	}
+
+	accessoryIDList := make([]int, 0, len(accessoryIDSet))
+	for accessoryID := range accessoryIDSet {
+		accessoryIDList = append(accessoryIDList, accessoryID)
+	}
+
+	staticRows := []accessoryBonusRow{}
+	err = ss.MainEng.Table("accessory_m").
+		In("accessory_id", accessoryIDList).
+		Cols("accessory_id,smile_max,pure_max,cool_max").
+		Find(&staticRows)
+	if err != nil {
+		return nil, err
+	}
+
+	staticBonusMap := make(map[int]accessoryBonus, len(staticRows))
+	for _, row := range staticRows {
+		staticBonusMap[row.AccessoryID] = accessoryBonus{
 			Smile: row.Smile,
 			Pure:  row.Pure,
 			Cool:  row.Cool,
 		}
 	}
 
+	accessoryMap := make(map[int]accessoryBonus, len(rows))
+	for _, row := range rows {
+		bonus, ok := staticBonusMap[row.AccessoryID]
+		if !ok {
+			continue
+		}
+		accessoryMap[row.AccessoryOwningUserID] = bonus
+	}
+
 	result := make(map[int]accessoryBonus, len(unitToAccessoryID))
 	for unitOwningUserID, accessoryOwningUserID := range unitToAccessoryID {
 		if bonus, ok := accessoryMap[accessoryOwningUserID]; ok {

internal/handler/notice/common.go

@@ -134,17 +134,7 @@ func getGreetingAccessoryInfo(ss *session.Session, userID, unitOwningUserID int)
 		return nil, nil
 	}
 
-	accessoryData := struct {
-		AccessoryID int `xorm:"accessory_id"`
-		Exp         int `xorm:"exp"`
-	}{}
-	has, err = ss.MainEng.Table("common_accessory_m").
-		Where("accessory_owning_user_id = ?", accessoryWear.AccessoryOwningUserID).
-		Cols("accessory_id,exp").
-		Get(&accessoryData)
-	if err != nil {
-		return nil, err
-	}
+	has, accessoryData := ss.GetAccessoryByAccessoryOwningUserID(accessoryWear.AccessoryOwningUserID)
 	if !has {
 		return nil, nil
 	}
@@ -154,9 +144,9 @@ func getGreetingAccessoryInfo(ss *session.Session, userID, unitOwningUserID int)
 		AccessoryID:           accessoryData.AccessoryID,
 		Exp:                   accessoryData.Exp,
 		NextExp:               0,
-		Level:                 8,
-		MaxLevel:              8,
-		RankUpCount:           4,
+		Level:                 accessoryData.MaxLevel,
+		MaxLevel:              accessoryData.MaxLevel,
+		RankUpCount:           accessoryData.MaxLevel - accessoryData.DefaultMaxLevel,
 		FavoriteFlag:          true,
 	}, nil
 }

internal/handler/ranking/live.go

@@ -199,17 +199,7 @@ func getRankingAccessoryInfo(ss *session.Session, targetUserID, unitOwningUserID
 		return nil, nil
 	}
 
-	accessoryData := struct {
-		AccessoryID int `xorm:"accessory_id"`
-		Exp         int `xorm:"exp"`
-	}{}
-	has, err = ss.MainEng.Table("common_accessory_m").
-		Where("accessory_owning_user_id = ?", accessoryOwningID).
-		Cols("accessory_id,exp").
-		Get(&accessoryData)
-	if err != nil {
-		return nil, err
-	}
+	has, accessoryData := ss.GetAccessoryByAccessoryOwningUserID(accessoryOwningID)
 	if !has {
 		return nil, nil
 	}
@@ -219,9 +209,9 @@ func getRankingAccessoryInfo(ss *session.Session, targetUserID, unitOwningUserID
 		AccessoryID:           accessoryData.AccessoryID,
 		Exp:                   accessoryData.Exp,
 		NextExp:               0,
-		Level:                 8,
-		MaxLevel:              8,
-		RankUpCount:           4,
+		Level:                 accessoryData.MaxLevel,
+		MaxLevel:              accessoryData.MaxLevel,
+		RankUpCount:           accessoryData.MaxLevel - accessoryData.DefaultMaxLevel,
 		FavoriteFlag:          true,
 	}, nil
 }

internal/handler/unit/wearaccessory.go

@@ -1,7 +1,9 @@
 package unit
 
 import (
+	"errors"
 	"honoka-chan/internal/middleware"
+	usermodel "honoka-chan/internal/model/user"
 	"honoka-chan/internal/router"
 	unitschema "honoka-chan/internal/schema/unit"
 	"honoka-chan/internal/session"
@@ -32,8 +34,20 @@ func wearAccessory(ctx *gin.Context) {
 	}
 
 	// 佩戴饰品
+	var exists bool
 	for _, v := range req.Wear {
 		// fmt.Println("Wear:", v.AccessoryOwningUserID, v.UnitOwningUserID)
+		exists, err = ss.UserEng.Table(new(usermodel.UserAccessory)).
+			Where("user_id = ? AND accessory_owning_user_id = ?", ss.UserID, v.AccessoryOwningUserID).
+			Exist()
+		if ss.CheckErr(err) {
+			return
+		}
+		if !exists {
+			ss.CheckErr(errors.New("accessory not found for user"))
+			return
+		}
+
 		data := unitschema.WearAccessoryData{
 			AccessoryOwningUserID: v.AccessoryOwningUserID,
 			UnitOwningUserID:      v.UnitOwningUserID,

internal/model/user/useraccessory.go

@@ -0,0 +1,123 @@
+package usermodel
+
+import (
+	"fmt"
+	"sort"
+
+	"xorm.io/xorm"
+)
+
+type UserAccessory struct {
+	AccessoryOwningUserID int `xorm:"accessory_owning_user_id pk autoincr"`
+	UserID                int `xorm:"user_id index"`
+	AccessoryID           int `xorm:"accessory_id index"`
+	Exp                   int `xorm:"exp"`
+}
+
+func (UserAccessory) TableName() string {
+	return "user_accessory"
+}
+
+type accessoryTemplateRow struct {
+	AccessoryID int `xorm:"accessory_id"`
+}
+
+type userAccessoryCountRow struct {
+	AccessoryID int `xorm:"accessory_id"`
+	Count       int `xorm:"cnt"`
+}
+
+func LoadAccessoryTemplateIDs(mainSession xorm.Interface) ([]int, error) {
+	rows := []accessoryTemplateRow{}
+	err := mainSession.Table("accessory_m").
+		Where("is_material = ? AND rarity = ?", 0, 4).
+		Cols("accessory_id").
+		OrderBy("accessory_id ASC").
+		Find(&rows)
+	if err != nil {
+		return nil, err
+	}
+
+	ids := make([]int, 0, len(rows))
+	for _, row := range rows {
+		ids = append(ids, row.AccessoryID)
+	}
+	return ids, nil
+}
+
+func EnsureUserAccessories(userSession *xorm.Session, mainSession xorm.Interface, userID int, minCount map[int]int) error {
+	accessoryIDs, err := LoadAccessoryTemplateIDs(mainSession)
+	if err != nil {
+		return err
+	}
+
+	existingRows := []userAccessoryCountRow{}
+	err = userSession.Table(new(UserAccessory)).
+		Select("accessory_id, COUNT(*) AS cnt").
+		Where("user_id = ?", userID).
+		GroupBy("accessory_id").
+		Find(&existingRows)
+	if err != nil {
+		return err
+	}
+
+	existingCount := make(map[int]int, len(existingRows))
+	for _, row := range existingRows {
+		existingCount[row.AccessoryID] = row.Count
+	}
+
+	for _, accessoryID := range accessoryIDs {
+		targetCount := 1
+		if count, ok := minCount[accessoryID]; ok && count > targetCount {
+			targetCount = count
+		}
+
+		for existingCount[accessoryID] < targetCount {
+			_, err = userSession.Insert(&UserAccessory{
+				UserID:      userID,
+				AccessoryID: accessoryID,
+				Exp:         0,
+			})
+			if err != nil {
+				return err
+			}
+			existingCount[accessoryID]++
+		}
+	}
+
+	return nil
+}
+
+func BuildAccessoryOwningUserIDMap(userSession *xorm.Session, userID int) (map[int][]int, error) {
+	rows := []UserAccessory{}
+	err := userSession.Table(new(UserAccessory)).
+		Where("user_id = ?", userID).
+		OrderBy("accessory_id ASC, accessory_owning_user_id ASC").
+		Find(&rows)
+	if err != nil {
+		return nil, err
+	}
+
+	result := make(map[int][]int)
+	for _, row := range rows {
+		result[row.AccessoryID] = append(result[row.AccessoryID], row.AccessoryOwningUserID)
+	}
+	return result, nil
+}
+
+func ResolveAccessoryOwningUserIDsByAccessoryID(owningIDs map[int][]int, requiredCounts map[int]int) (map[int][]int, error) {
+	result := make(map[int][]int, len(requiredCounts))
+	for accessoryID, count := range requiredCounts {
+		ids := owningIDs[accessoryID]
+		if len(ids) < count {
+			return nil, fmt.Errorf("insufficient user accessories for accessory_id=%d need=%d have=%d", accessoryID, count, len(ids))
+		}
+		result[accessoryID] = append([]int(nil), ids[:count]...)
+	}
+
+	for accessoryID := range result {
+		sort.Ints(result[accessoryID])
+	}
+
+	return result, nil
+}

internal/session/accessory.go

@@ -17,12 +17,11 @@ func (ss *Session) GetUserAccessoryWearByUnitOwningUserID(unitOwningUserID int)
 	return has, &wearData
 }
 
-func (ss *Session) GetAccessoryByAccessoryOwningUserID(accessoryOwningUserID int) (bool, *accessorymodel.Accessory) {
-	accessoryData := accessorymodel.Accessory{}
-	has, err := ss.MainEng.Table("common_accessory_m").Alias("a").
-		Join("LEFT", "accessory_m", "a.accessory_id = accessory_m.accessory_id").
-		Where("a.accessory_owning_user_id = ?", accessoryOwningUserID).
-		Cols("accessory_m.*,a.exp").Get(&accessoryData)
+func (ss *Session) GetUserAccessoryByAccessoryOwningUserID(accessoryOwningUserID int) (bool, *usermodel.UserAccessory) {
+	accessoryData := usermodel.UserAccessory{}
+	has, err := ss.UserEng.Table(new(usermodel.UserAccessory)).
+		Where("accessory_owning_user_id = ?", accessoryOwningUserID).
+		Get(&accessoryData)
 	if ss.CheckErr(err) {
 		return false, nil
 	}
@@ -30,6 +29,28 @@ func (ss *Session) GetAccessoryByAccessoryOwningUserID(accessoryOwningUserID int
 	return has, &accessoryData
 }
 
+func (ss *Session) GetAccessoryByAccessoryOwningUserID(accessoryOwningUserID int) (bool, *accessorymodel.Accessory) {
+	has, userAccessoryData := ss.GetUserAccessoryByAccessoryOwningUserID(accessoryOwningUserID)
+	if !has {
+		return false, nil
+	}
+
+	accessoryData := accessorymodel.Accessory{}
+	has, err := ss.MainEng.Table("accessory_m").
+		Where("accessory_id = ?", userAccessoryData.AccessoryID).
+		Get(&accessoryData)
+	if ss.CheckErr(err) {
+		return false, nil
+	}
+	if !has {
+		return false, nil
+	}
+
+	accessoryData.Exp = userAccessoryData.Exp
+
+	return has, &accessoryData
+}
+
 func (ss *Session) GetUserAccessoryInfoByUnitOwningUserID(unitOwningUserID int) (bool, *liverecordschema.AccessoryInfo) {
 	has, wearData := ss.GetUserAccessoryWearByUnitOwningUserID(unitOwningUserID)
 	if !has {

internal/startup/database.go

@@ -22,6 +22,7 @@ func CreateTables() {
 	// db.UserEng.ShowSQL(true)
 	db.UserEng.Sync2(new(ghomemodel.DeviceKey))
 	db.UserEng.Sync2(new(loginmodel.AuthKey))
+	db.UserEng.Sync2(new(usermodel.UserAccessory))
 	db.UserEng.Sync2(new(usermodel.UserAccessoryWear))
 	db.UserEng.Sync2(new(usermodel.UserDeck))
 	db.UserEng.Sync2(new(usermodel.UserDeckUnit))
@@ -39,6 +40,7 @@ func CreateTables() {
 	db.UserEng.Sync2(new(usermodel.UserUnitSkillEquip))
 
 	MigrateUserPref()
+	MigrateUserAccessories()
 	MigrateUserLiveData()
 }
 
@@ -67,6 +69,209 @@ func MigrateUserPref() {
 	}
 }
 
+type accessoryOwningMapRow struct {
+	AccessoryOwningUserID int `xorm:"accessory_owning_user_id"`
+	AccessoryID           int `xorm:"accessory_id"`
+}
+
+func MigrateUserAccessories() {
+	session := db.UserEng.NewSession()
+	defer session.Close()
+
+	if err := session.Begin(); err != nil {
+		log.Fatalln("迁移 user_accessory 失败:", err.Error())
+	}
+
+	userIDs := []int{}
+	if err := session.Table(new(usermodel.Users)).Cols("user_id").Find(&userIDs); err != nil {
+		session.Rollback()
+		log.Fatalln("迁移 user_accessory 失败:", err.Error())
+	}
+
+	templateAccessoryIDs, err := usermodel.LoadAccessoryTemplateIDs(db.MainEng)
+	if err != nil {
+		session.Rollback()
+		log.Fatalln("迁移 user_accessory 失败:", err.Error())
+	}
+
+	legacyAccessoryMap := map[int]int{}
+	hasLegacyTable, err := db.MainEng.IsTableExist("common_accessory_m")
+	if err != nil {
+		session.Rollback()
+		log.Fatalln("迁移 user_accessory 失败:", err.Error())
+	}
+	if hasLegacyTable {
+		legacyRows := []accessoryOwningMapRow{}
+		if err := db.MainEng.Table("common_accessory_m").
+			Cols("accessory_owning_user_id,accessory_id").
+			Find(&legacyRows); err != nil {
+			session.Rollback()
+			log.Fatalln("迁移 user_accessory 失败:", err.Error())
+		}
+		for _, row := range legacyRows {
+			legacyAccessoryMap[row.AccessoryOwningUserID] = row.AccessoryID
+		}
+	}
+
+	wearRows := []usermodel.UserAccessoryWear{}
+	if err := session.Table(new(usermodel.UserAccessoryWear)).Find(&wearRows); err != nil {
+		session.Rollback()
+		log.Fatalln("迁移 user_accessory 失败:", err.Error())
+	}
+
+	existingAccessories := []usermodel.UserAccessory{}
+	if err := session.Table(new(usermodel.UserAccessory)).Find(&existingAccessories); err != nil {
+		session.Rollback()
+		log.Fatalln("迁移 user_accessory 失败:", err.Error())
+	}
+
+	currentAccessoryMap := make(map[int]map[int]int)
+	for _, row := range existingAccessories {
+		if currentAccessoryMap[row.UserID] == nil {
+			currentAccessoryMap[row.UserID] = map[int]int{}
+		}
+		currentAccessoryMap[row.UserID][row.AccessoryOwningUserID] = row.AccessoryID
+	}
+
+	requiredCountsByUser := make(map[int]map[int]int, len(userIDs))
+	for _, row := range wearRows {
+		accessoryID, ok := resolveAccessoryIDForWear(currentAccessoryMap, legacyAccessoryMap, templateAccessoryIDs, row.UserID, row.AccessoryOwningUserID)
+		if !ok {
+			continue
+		}
+		if requiredCountsByUser[row.UserID] == nil {
+			requiredCountsByUser[row.UserID] = map[int]int{}
+		}
+		requiredCountsByUser[row.UserID][accessoryID]++
+	}
+
+	for _, userID := range userIDs {
+		if err := usermodel.EnsureUserAccessories(session, db.MainEng, userID, requiredCountsByUser[userID]); err != nil {
+			session.Rollback()
+			log.Fatalln("迁移 user_accessory 失败:", err.Error())
+		}
+	}
+
+	updatedAccessories := []usermodel.UserAccessory{}
+	if err := session.Table(new(usermodel.UserAccessory)).
+		OrderBy("user_id ASC, accessory_id ASC, accessory_owning_user_id ASC").
+		Find(&updatedAccessories); err != nil {
+		session.Rollback()
+		log.Fatalln("迁移 user_accessory 失败:", err.Error())
+	}
+
+	currentAccessoryMap = make(map[int]map[int]int)
+	availableOwningIDs := make(map[int]map[int][]int)
+	for _, row := range updatedAccessories {
+		if currentAccessoryMap[row.UserID] == nil {
+			currentAccessoryMap[row.UserID] = map[int]int{}
+		}
+		if availableOwningIDs[row.UserID] == nil {
+			availableOwningIDs[row.UserID] = map[int][]int{}
+		}
+		currentAccessoryMap[row.UserID][row.AccessoryOwningUserID] = row.AccessoryID
+		availableOwningIDs[row.UserID][row.AccessoryID] = append(availableOwningIDs[row.UserID][row.AccessoryID], row.AccessoryOwningUserID)
+	}
+
+	usedOwningIDs := make(map[int]map[int]struct{})
+	for _, row := range wearRows {
+		if currentAccessoryMap[row.UserID] == nil {
+			continue
+		}
+		if _, ok := currentAccessoryMap[row.UserID][row.AccessoryOwningUserID]; !ok {
+			continue
+		}
+		if usedOwningIDs[row.UserID] == nil {
+			usedOwningIDs[row.UserID] = map[int]struct{}{}
+		}
+		usedOwningIDs[row.UserID][row.AccessoryOwningUserID] = struct{}{}
+	}
+
+	for i := range wearRows {
+		row := wearRows[i]
+		if row.AccessoryOwningUserID <= 0 {
+			continue
+		}
+		if currentAccessoryMap[row.UserID] != nil {
+			if _, ok := currentAccessoryMap[row.UserID][row.AccessoryOwningUserID]; ok {
+				continue
+			}
+		}
+
+		accessoryID, ok := resolveAccessoryIDForWear(currentAccessoryMap, legacyAccessoryMap, templateAccessoryIDs, row.UserID, row.AccessoryOwningUserID)
+		if !ok {
+			continue
+		}
+
+		candidates := availableOwningIDs[row.UserID][accessoryID]
+		if len(candidates) == 0 {
+			continue
+		}
+
+		if usedOwningIDs[row.UserID] == nil {
+			usedOwningIDs[row.UserID] = map[int]struct{}{}
+		}
+
+		newOwningID := 0
+		for _, candidate := range candidates {
+			if _, used := usedOwningIDs[row.UserID][candidate]; used {
+				continue
+			}
+			newOwningID = candidate
+			break
+		}
+		if newOwningID == 0 {
+			newOwningID = candidates[0]
+		}
+
+		if _, err := session.Table(new(usermodel.UserAccessoryWear)).
+			ID(row.ID).
+			Cols("accessory_owning_user_id").
+			Update(&usermodel.UserAccessoryWear{AccessoryOwningUserID: newOwningID}); err != nil {
+			session.Rollback()
+			log.Fatalln("迁移 user_accessory 失败:", err.Error())
+		}
+		wearRows[i].AccessoryOwningUserID = newOwningID
+		usedOwningIDs[row.UserID][newOwningID] = struct{}{}
+	}
+
+	if err := session.Commit(); err != nil {
+		session.Rollback()
+		log.Fatalln("迁移 user_accessory 失败:", err.Error())
+	}
+}
+
+func resolveAccessoryIDForWear(currentAccessoryMap map[int]map[int]int, legacyAccessoryMap map[int]int, accessoryIDs []int, userID int, accessoryOwningUserID int) (int, bool) {
+	if accessoryOwningUserID <= 0 {
+		return 0, false
+	}
+
+	if currentAccessoryMap[userID] != nil {
+		if accessoryID, ok := currentAccessoryMap[userID][accessoryOwningUserID]; ok {
+			return accessoryID, true
+		}
+	}
+
+	if accessoryID, ok := legacyAccessoryMap[accessoryOwningUserID]; ok {
+		return accessoryID, true
+	}
+
+	return legacyAccessoryOwningUserIDToAccessoryID(accessoryIDs, accessoryOwningUserID)
+}
+
+func legacyAccessoryOwningUserIDToAccessoryID(accessoryIDs []int, accessoryOwningUserID int) (int, bool) {
+	if accessoryOwningUserID <= 0 {
+		return 0, false
+	}
+
+	index := (accessoryOwningUserID - 1) / 9
+	if index < 0 || index >= len(accessoryIDs) {
+		return 0, false
+	}
+
+	return accessoryIDs[index], true
+}
+
 type liveGoalRewardMigrationRow struct {
 	LiveGoalRewardID int `xorm:"live_goal_reward_id"`
 	LiveDifficultyID int `xorm:"live_difficulty_id"`