'int', 'participant_salutation_id' => 'int', 'participant_birthdate' => 'datetime', ]; protected $fillable = [ 'lead_id', 'participant_name', 'participant_firstname', 'participant_birthdate', 'participant_salutation_id', 'participant_child', 'nationality_id' ]; public function lead() { return $this->belongsTo(Lead::class); } public function salutation() { return $this->belongsTo(Salutation::class, 'participant_salutation_id'); } public function travel_nationality() { return $this->belongsTo(TravelNationality::class, 'nationality_id'); } }