Laravel pass value to model - php

Question

Right now I try this query with eloquent:
'MentorId' => $employee->intern(true)->mentor(true)->MentorId,
And in my employee and intern model I've got this:
Intern
/**
* #return mixed
*/
public function intern($withTrashed = false)
{
if($withTrashed == true)
{
return $this->belongsTo(internModel::class, 'InternId')->withTrashed();
}
return $this->belongsTo(internModel::class,'InternId');
}
Mentor
/**
* #return mixed
*/
public function mentor($withTrashed = false)
{
if($withTrashed == true)
{
return $this->belongsTo(mentorModel::class, 'MentorId')->withTrashed();
}
return $this->belongsTo(mentorModel::class,'MentorId');
}
But it crashes:
BadMethodCallException in Builder.php line 2148:
Call to undefined method Illuminate\Database\Query\Builder::mentor()
How could I fix this?
--EDIT--
Employee
<?php
namespace App\src\employee;
use Illuminate\Foundation\Auth\User as Authenticatable;
use App\src\department\Department as departmentModel;
use App\src\employee\Employee as employeeModel;
use Illuminate\Database\Eloquent\SoftDeletes;
use App\src\intern\Intern as internModel;
use App\src\mentor\Mentor as mentorModel;
use App\src\employee\Role as roleModel;
class Employee extends Authenticatable
{
use SoftDeletes;
use EmployeeServiceTrait;
/**
* table name
*/
protected $table = 'employee';
/**
* Mass assignment fields
*/
protected $fillable = ['RoleId', 'DepartmentId', 'InternId', 'FirstName', 'LastName', 'Bio','api_token', 'email', 'LinkedIn', 'password', 'Address', 'Zip', 'City', 'ProfilePicture', 'BirthDate', 'StartDate', 'EndDate', 'Suspended','LinkedIn'];
/**
* Primarykey
*/
protected $primaryKey = 'EmployeeId';
/**
* Deleted_at
*/
protected $dates = ['deleted_at'];
/**
* #return mixed
*/
public function role()
{
return $this->belongsTo(roleModel::class,'RoleId');
}
/**
* #return mixed
*/
public function intern($withTrashed = false)
{
if($withTrashed == true)
{
return $this->belongsTo(internModel::class, 'InternId')->withTrashed();
}
return $this->belongsTo(internModel::class,'InternId');
}
/**
* #return mixed
*/
public function department()
{
return $this->belongsTo(departmentModel::class,'DepartmentId');
}
/**
* #return mixed
*/
public function mentor()
{
return $this->belongsTo(mentorModel::class,'MentorId');
}
/**
* #return mixed
*/
public function employees()
{
return $this->hasManyThrough(employeeModel::class,departmentModel::class,'CompanyId','DepartmentId');
}
/**
* #param $role
* #return bool
*/
public function hasRole($role)
{
if(strtolower($this->role->RoleName) == strtolower($role))
{
return true;
}
return false;
}
}

Answer 1

The problem you have is that any Eloquent relationship object is actually an instance of Relation. This means when you create relationships you actually return a collection (instance of Builder); Hense your error:
BadMethodCallException in Builder.php line 2148:
Call to undefined method Illuminate\Database\Query\Builder::mentor()
The simple solution, without any modification to your code would be something like:
'MentorId' => $employee->intern(true)->first()->mentor(true)->first()->MentorId;
However, you could use overloading like the following:
'MentorId' => $employee->intern->mentor->MentorId;
Although this will NOT include your withTrashed. You can however tweak your relationship to something like:
public function intern($withTrashed = false)
{
$relation = $this->belongsTo(internModel::class, 'InternId');
if($withTrashed == true)
{
return $relation->withTrashed()->first();
}
return $relation->first();
}
But I wouldn't advise this because later on if you try using things like WhereHas you will get errors. That said, another way would be to do something along the following lines:
public function intern()
{
return $this->belongsTo(internModel::class, 'InternId');
}
Then get trashed like:
'MentorId' => $employee->intern()->withTrashed()->first()->mentor()->withTrashed()->first()->MentorId;

Answer 2

Try as below as per laravel guide. Keep in mind that parent model must have hasOne/hasMany method and child model must have belongsTo method.
Intern
/**
* #return mixed
*/
public function intern($withTrashed = false)
{
if($withTrashed == true)
{
return $this->hasOne('App\Intern', 'InternId')->withTrashed();
}
return $this->hasOne('App\Intern','InternId');
}
Employee
/**
* #return mixed
*/
public function intern($withTrashed = false)
{
if($withTrashed == true)
{
return $this->belongsTo('App\Intern', 'InternId')->withTrashed();
}
return $this->belongsTo('App\Intern','InternId');
}
Note: Same for all other models.