获取群成员时，按照remark、fn/ln、nickname先后顺序显示

internal/rpc/group/fill.go

@@ -16,9 +16,51 @@ package group
 
 import (
 	"context"
+
+	"github.com/openimsdk/open-im-server/v3/pkg/common/convert"
 	relationtb "github.com/openimsdk/open-im-server/v3/pkg/common/storage/model"
+	"github.com/openimsdk/protocol/sdkws"
+	"github.com/openimsdk/tools/mcontext"
+	"github.com/openimsdk/tools/utils/datautil"
 )
 
 func (s *groupServer) PopulateGroupMember(ctx context.Context, members ...*relationtb.GroupMember) error {
 	return s.notification.PopulateGroupMember(ctx, members...)
 }
+
+// applyMemberDisplayNicknames 按当前用户视角重设群成员 Nickname：
+// 好友用 remark；非好友用 firstName+lastName，为空则 fallback 到 nickname。
+func (s *groupServer) applyMemberDisplayNicknames(ctx context.Context, members []*sdkws.GroupMemberFullInfo) error {
+	if len(members) == 0 {
+		return nil
+	}
+	viewerID := mcontext.GetOpUserID(ctx)
+	if viewerID == "" {
+		return nil
+	}
+	userIDs := datautil.Slice(members, func(m *sdkws.GroupMemberFullInfo) string { return m.UserID })
+	users, err := s.userClient.GetUsersInfoMap(ctx, userIDs)
+	if err != nil {
+		return err
+	}
+	friendInfos, err := s.relationClient.GetFriendsInfo(ctx, viewerID, userIDs)
+	if err != nil {
+		return err
+	}
+	remarkMap := make(map[string]string, len(friendInfos))
+	for _, f := range friendInfos {
+		if f != nil {
+			remarkMap[f.FriendUserID] = f.Remark
+		}
+	}
+	for _, m := range members {
+		if remark, ok := remarkMap[m.UserID]; ok && remark != "" {
+			m.Nickname = remark
+			continue
+		}
+		if name := convert.MemberDisplayNickname(users[m.UserID]); name != "" {
+			m.Nickname = name
+		}
+	}
+	return nil
+}

internal/rpc/group/group.go

@@ -793,9 +793,13 @@ func (s *groupServer) getGroupMembersInfo(ctx context.Context, groupID string, u
 	if err := s.PopulateGroupMember(ctx, members...); err != nil {
 		return nil, err
 	}
-	return datautil.Slice(members, func(e *model.GroupMember) *sdkws.GroupMemberFullInfo {
+	pbMembers := datautil.Slice(members, func(e *model.GroupMember) *sdkws.GroupMemberFullInfo {
 		return convert.Db2PbGroupMember(e)
-	}), nil
+	})
+	if err := s.applyMemberDisplayNicknames(ctx, pbMembers); err != nil {
+		return nil, err
+	}
+	return pbMembers, nil
 }
 
 // GetGroupApplicationList handles functions that get a list of group requests.

pkg/common/convert/user.go

@@ -34,6 +34,17 @@ func BuildFullName(firstName, lastName string) string {
 	return strings.TrimSpace(firstName + " " + lastName)
 }
 
+// MemberDisplayNickname 非好友场景下的群成员展示名：优先 firstName+lastName，否则 nickname。
+func MemberDisplayNickname(u *sdkws.UserInfo) string {
+	if u == nil {
+		return ""
+	}
+	if name := BuildFullName(u.FirstName, u.LastName); name != "" {
+		return name
+	}
+	return u.Nickname
+}
+
 func UserDB2Pb(user *relationtb.User) *sdkws.UserInfo {
 	return &sdkws.UserInfo{
 		UserID:            user.UserID,