department.php

<?php

class Department extends Eloquent {
	protected $guarded = array();

	public static $rules = array();

	/**
	 * The database table used by the model.
	 *
	 * @var string
	 */
	protected $table = 'shifts';


	/**
	 * Get the unique identifier for the this model
	 *
	 * @return mixed
	 */
	public function getIdentifier()
	{
		return $this->getKey();
	}

	public function job()
	{
		return $this->belongsTo('Job');
	}
}

departmentcontroller.php

<?php

class DepartmentsController extends BaseController {

	/**
	 * Display a listing of the resource.
	 *
	 * @return Response
	 */
	public function index($jobId)
	{
		Clockwork::startEvent('List_Default_Departments', 'Starting.');\
		$positions = Auth::user()->jobs()->where('job_id', '=',$jobId)->departments();
		Clockwork::endEvent('List_Default_Departments', 'Done.');
		return Response::json($positions);
	}
}
?>

error

file: "/media/Misc/Projects/Purple Crown/server/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php"
line: 1891
message: "Call to undefined method Illuminate\Database\Query\Builder::departments()"
type: "BadMethodCallException"

jobs.php

<?php

class Job extends Eloquent {
	protected $guarded = array();

	public static $rules = array();

	/**
	 * The database table used by the model.
	 *
	 * @var string
	 */
	protected $table = 'jobs';


	/**
	 * Get the unique identifier for the this model
	 *
	 * @return mixed
	 */
	public function getIdentifier()
	{
		return $this->getKey();
	}

	/**
	 * Relationships
	 */
	public function user() 
	{
		return $this->belongsTo('User', 'user_id');
	}
	public function departments()
	{
		return $this->hasMany('Department');
	}
}

route.php

<?php
Route::resource('/v1/jobs', 'JobController');
Route::resource('/v1/jobs.departments', 'DepartmentController');
?>
//so: www.example.com/v1/jobs/1/departments/