diff --git a/types/db.go b/types/db.go
index f20b1d8..4dbde7e 100644
--- a/types/db.go
+++ b/types/db.go
@@ -28,8 +28,8 @@ type (
 	Std_IICUDS struct {
 		ID        uint           `gorm:"primarykey;"  json:"id"`
 		Identity  string         `gorm:"column:identity;type:varchar(36);uniqueIndex;"  json:"identity"` // 唯一标识，24位NanoID,36位为ULID
-		CreatedAt time.Time      `json:"created_at"`
-		UpdatedAt time.Time      `json:"updated_at"`
+		CreatedAt time.Time      `gorm:"" json:"created_at"`
+		UpdatedAt time.Time      `gorm:"" json:"updated_at"`
 		DeletedAt gorm.DeletedAt `gorm:"index;" json:"deleted_at"`
 		Status    int8           `gorm:"default:0;index;" json:"status"` // 状态：默认为0，-1禁止，1为正常
 	}
@@ -37,15 +37,15 @@ type (
 	// standard ID,Identity,Created,Updated,Deleted,Status definition.
 	Std_ICUD struct {
 		ID        uint           `gorm:"primarykey;"  json:"id"`
-		CreatedAt time.Time      `json:"created_at"`
-		UpdatedAt time.Time      `json:"updated_at"`
+		CreatedAt time.Time      `gorm:"" json:"created_at"`
+		UpdatedAt time.Time      `gorm:"" json:"updated_at"`
 		DeletedAt gorm.DeletedAt `gorm:"index;" json:"deleted_at"`
 	}
 
 	// standard ID,Created definition.
 	Std_IdCreated struct {
 		ID        uint      `gorm:"primarykey;"  json:"id"`
-		CreatedAt time.Time `json:"created_at"`
+		CreatedAt time.Time `gorm:"" json:"created_at"`
 	}
 
 	// standard PassportID,PassportIdentity definition.