Add attendance id resp for event join api, set root api to /app/api/v1

Signed-off-by: Asai Neko <sugar@sne.moe>

data/attendance.go

@@ -112,7 +112,7 @@ func (self *Attendance) GetEventsByUserID(ctx context.Context, userID uuid.UUID)
 	return &result, err
 }
 
-func (self *Attendance) Create(ctx context.Context) error {
+func (self *Attendance) Create(ctx context.Context) (uuid.UUID, error) {
 	self.UUID = uuid.New()
 	self.AttendanceId = uuid.New()
 
@@ -124,10 +124,10 @@ func (self *Attendance) Create(ctx context.Context) error {
 		return nil
 	})
 	if err != nil {
-		return err
+		return uuid.Nil, err
 	}
 
-	return nil
+	return self.AttendanceId, nil
 }
 
 func (self *Attendance) GetAttendanceListByEventId(ctx context.Context, eventId uuid.UUID) (*[]Attendance, error) {