model - Table inheritance in Laravel -

as newbie laravel, have problem setting laravel models correctly. in uml diagram, i'm using generalization can "inherit" attributes parent table:

in database, have following.

entity table

------------------- | id | identifier | ------------------- | 1  |  azx-c56   | ------------------- | 2  |  azx-c06   | ------------------- | 3  |  mzx-9f1   | ------------------- | 4  |  mzx-x09   | ------------------- 

worker table

--------------------------------------------- | id  | entity_id | firstname | lastname |..| --------------------------------------------- |  1  |     1     |   jean    |  michel  |..| --------------------------------------------- |  2  |     2     |   jane    |    doe   |..| --------------------------------------------- 

machine table

---------------------------------------------- | id  | entity_id |    type   | description  | ---------------------------------------------- |  1  |     3     |  xu-09-a  |  lorem ipsum | ---------------------------------------------- |  2  |     4     |  xz-24-u  |  lorem ipsum | ---------------------------------------------- 

my models respectively:

class entity extends model {      protected $fillable = ['identifier'];       public function worker(){          return $this->hasone(worker::class);      }      public function machine(){          return $this->hasone(machine::class);      } } class worker extends model {      protected $fillable = ['entity_id','firstname','lastname'];       public function entity(){          return $this->belongsto(entity::class);      }  } class machine extends model {      protected $fillable = ['entity_id','type','description'];       public function entity(){          return $this->belongsto(entity::class);      }  } 

my question is: doing right, or there better way map tables correctly in laravel ?

this not inheritance. association. referencing ids entity table.

from see id used either worker or robot should add constraint xor.