Cascade UPDATES and DELETES from parent to child table relations. Golang - Gorm

gorm_cascading.go

// HOW TO EXPRESSS CASCADING RELATIONS BETWEEN RELATED GORM MODELS
// if you update the server_id, it updates the server_id on sessions with old server_id
// if you delete the server, it deletes all sessions with same server_id

type Server struct {
	Model
	ServerID uuid.UUID `gorm:"type:uuid; primaryKey"`
	# ...
	Sessions      []Session `gorm:"constraint:OnUpdate:CASCADE,OnDelete:CASCADE;"`
}


type Session struct {
	Model
	SessionID uuid.UUID `gorm:"type:uuid; primaryKey"`
  # ...
}