package models import ( "time" "github.com/google/uuid" "gorm.io/gorm" ) type ReadReceipt struct { ID uuid.UUID `gorm:"type:uuid;primaryKey" json:"id"` UserID uuid.UUID `gorm:"type:uuid;not null;uniqueIndex:uq_read_receipts_user_message" json:"user_id"` MessageID uuid.UUID `gorm:"type:uuid;not null;uniqueIndex:uq_read_receipts_user_message" json:"message_id"` ReadAt time.Time `gorm:"autoCreateTime" json:"read_at"` } func (r *ReadReceipt) BeforeCreate(tx *gorm.DB) error { if r.ID == uuid.Nil { r.ID = uuid.New() } return nil } func (ReadReceipt) TableName() string { return "read_receipts" }