Laravel eloquent All () method queries the MySQL date field only returns the year

MySQL Date_key field property is date,
Using the All () method after creating the model with Laravel eloquent, the Date_key field returns only the year.
Do not know whether the model time format to set or what the problem, seek guidance. The code is as follows:
Model:
Class Rpt_ep_read extends Model
{

//protected $table = 'rpt_ep_read';protected $primaryKey = 'date_key';

}
Controller
Use Appmodelsrptdatawebrpt_ep_read;
Class TestController extends Controller {
Public Function test () {

 $data = Rpt_ep_read::all();  return $data;

}
}
return value:

Mysql
CREATE TABLE rpt_ep_read (
date_keyDate not NULL COMMENT ' time ',
cust_numInt (one) not NULL COMMENT ' number of users ',
PRIMARY KEY ( date_key )
) Engine=innodb DEFAULT Charset=utf8 collate=utf8_unicode_ci;

Use Db::table ()->get () to return normally

Reply content:

MySQL Date_key field property is date,
Using the All () method after creating the model with Laravel eloquent, the Date_key field returns only the year.
Do not know whether the model time format to set or what the problem, seek guidance. The code is as follows:
Model:
Class Rpt_ep_read extends Model
{

//protected $table = 'rpt_ep_read';protected $primaryKey = 'date_key';

}
Controller
Use Appmodelsrptdatawebrpt_ep_read;
Class TestController extends Controller {
Public Function test () {

 $data = Rpt_ep_read::all();  return $data;

}
}
return value:

Mysql
CREATE TABLE rpt_ep_read (
date_keyDate not NULL COMMENT ' time ',
cust_numInt (one) not NULL COMMENT ' number of users ',
PRIMARY KEY ( date_key )
) Engine=innodb DEFAULT Charset=utf8 collate=utf8_unicode_ci;

Use Db::table ()->get () to return normally

Add it to your Model bottom public $incrementing = false; , or the Laravel default primary key is self-increment, and it turns into a int return

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