'string', 'alias_id' => 'string', 'recipient_id' => 'string' ]; public function setAliasAttribute($alias) { $this->attributes['alias_id'] = $alias->getKey(); $this->setRelation('alias', $alias); } public function setRecipientAttribute($recipient) { $this->attributes['recipient_id'] = $recipient->getKey(); $this->setRelation('recipient', $recipient); } /** * Get the alias for this pivot row. */ public function alias() { return $this->belongsTo(Alias::class); } /** * Get the recipient for this pivot row. */ public function recipient() { return $this->belongsTo(Recipient::class); } }