Roles3                 *Roles                 `gorm:"serializer:json;not null"`
	Contracts              map[string]interface{} `gorm:"serializer:json"`
	JobInfo                Job                    `gorm:"type:bytes;serializer:gob"`
	CreatedTime            int64                  `gorm:"serializer:unixtime;type:datetime"` // store time in db, use int as field type