laravel 5.1 BelongsTo Reverse call

Question

What i know:

$this->$parent->childs(); //we get childs data

what i want to know how:

$this->child->find($id)->parent(); //how to get childs parent without including model in controller | by just using eloquent

heres my sample code of employee and employeeDependent model:

trait EmployeeRelationships{

    public function dependents(){
        return $this->hasMany(\App\DB\EmployeeDependent\EmployeeDependent::class);
    }

}

trait EmployeeDependentRelationships{

    /**
     * @return mixed
     */
    public function employee(){
        return $this->belongsTo(\App\DB\Employee\Employee::class, 'employee_id');
    }
}

Answer 1

If you want to get the reverse of a BelongsTo relationship you need to specify the inverse of the relationship on the corresponding model. For example:

Employee Class

class Employee extends Model
{
    public dependents()
    {
        return $this->hasMany(Dependant::class);
    }
}

Dependent Class

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

With these relationships defined you can then access the relevant models by calling the appropriate methods like so:

$dependents = Employee::first()->dependents; // Returns an eloquent collection
$employee   = Dependent::first()->employee;  // Returns a model of type Employee

Note that in this example using the first() method to grab a model, you can can do this with any object of the correct type.