Laravel Models Poperty of non-object

I have a People table

CREATE TABLE `people` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `job_title` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `profile_pic` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL,
  `departments` varchar(500) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=95 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

An a departments table

CREATE TABLE `departments` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `people_id` int(11) NOT NULL,
  `department_id` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=50 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

• One person can be in many departments
• In the departments table the foreign_key is people_id

In my people model

public function departments()
    {
 return $this->hasMany('App\Models\Departments', 'id', 'people_id');

    }

and finally I try and return some results

 return $people::find(1)->departments;

I get the error,

**ErrorException in web.php line 129:
Trying to get property of non-object**

Forgive me if this is a stupid error, I have used laravel for a while but never set up models with relationships before.

via Chebli Mohamed