如何在 Eloquent ORM 中使用此方法？

Question

Hlw, I am a new comer in php , laravel can you explain that How Can I Creat this is isAuthorized() method with laravel Elouquet by replacing this query builder

class User extends Authenticatable
{
    public function isAuthorized($object, $operation)
    {
        return Db::table('role_permissions')
            ->where('object', $object)
            ->where('operation', $operation)
            ->join('user_roles', 'user_roles.role_id', '=', 'role_permissions.role_id')
            ->where('user_roles.user_id', $this->id)
            ->exists();
    }
}

Answer 1

Create your Models like so.

public class RolePermission {
    public function UserRoles() {
        return $this->hasMany(UserRole::class, 'role_id', 'role_id');
    }
}

public class UserRole {

}

WhereHas can query relationships and is the cornerstone to replacing joins.

RolePermission::where('object', $object)
    ->where('operation', $operation)
    ->whereHas('UserRoles', function ($query) {
        $query->where('user_roles.user_id', $this->id)
    })     
    ->exists();