relate pivot table to another table in laravel

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I have a many-to-many relationship with the following structure:

|Table receipts       |
|- id                 |
|- code               |
|- date               |
-----------------------
|Table plans          |
|- id                 |
|- number             |
|- name               |
-----------------------
|Table plan_receipt   |(Pivot)  
|- id                 |
|- receipt_id         |
|- plan_id            |
|- employee_id        |
-----------------------
|Table employees      |
|- id                 |
|- name               |
-----------------------

As you can see, I have the typical many-to-many relationship generating a pivot table that contains the keys of said tables, but I also have a third foreign key that refers to another table "employees", how can I relate this table of employees with my table? pivot? try to create a model for the pivot table and make the relationship, in addition to using ->using() but so far it has not worked for me, I leave you with an example of my current models.

class Receipt extends Model
{
    public function plans()
    {
        return $this->belongsToMany(Plan::class)->using(PlanReceipt::class);
    }
}

class Plan extends Model
{
    public function receipts()
    {
        return $this->belongsToMany(Receipt::class);
    }
}

class PlanReceipt extends Pivot
{
    protected $table = 'plan_receipt';

    public function employee()
    {
        return $this->belongsTo(Employee::class, 'employee_id');
    }
}

class Employee extends Model
{
    public function plan_receipt()
    {
        return $this->hasMany(PlanReceipt::class, 'id');
    }
}
eloquent laravel model mysql php
1 Answers

Guess you need to make the following two changes

class Employee extends Model
{
    public function plan_receipt()
    {
        //Specifying foreign key is not required as it is as per Eloquent convention
        return $this->hasMany(PlanReceipt::class);

        //If you want to specify the keys then it should be
        // return $this->hasMany(PlanReceipt::class, 'employee_id', 'id');
    }
}

class PlanReceipt extends Pivot
{
    protected $table = 'plan_receipt';

    //Assuming the id column on plan_receipt table is auto incrementing 
    public $incrementing = true; 

    public function employee()
    {
        //return $this->belongsTo(Employee::class, 'employee_id');

        //Specifying foreign key is not required as it is already as per Laravel Eloquent convention
        return $this->belongsTo(Employee::class);
    }
}
user_12203640
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