Can't call model method in toSearchableArray array when created via factory

Question

I am trying to get a model factory to work, the main model Venue the following:

1. Place which is a hasOne relation
2. Type which has a belongsTo relation

On top of that, place has a function called full_address, that returns a comma separated string.

The Venue has a toSearchableArray() to send custom data to Algolia, when I run the factory create method I get:

PHP Error:  Call to a member function full_address() on null in  app/Venue.php on line 57

This is the venue Model

class Venue extends Model
{

    use Searchable;

    public function toSearchableArray()
    {
        $type = $this->type()->first();
        $place = $this->place()->first();

        return [ 'name' => $this->name,
            'type' => $type['name'],
            'type_id' => $type['id'],
            'venue_id' => $this->id,
            'background_image' =>$type['background_file_name'],
            'full_address' => $place->full_address(),
            'slug' => $this->slug_field,
            '_geoloc' =>
                [ 'lat' => (float)$this->latitude,
                    'lng' => (float)$this->longitude
                ]
        ];
    }

    public function place()
    {
        return $this->hasOne('App\Place');
    }

    public function type()
    {
        return $this->belongsTo('App\Type');
    }

}

And these are the model factories

$factory->define(App\Venue::class, function (Faker\Generator $faker) {
    return [
        'name' => $faker->name,
        'phoneNumber' => $faker->word,
        'latitude' => $faker->latitude,
        'longitude' => $faker->longitude,
        'LatLong' => $faker->word,
        'website' => $faker->word,
        'type' => $faker->word,
        'place_id' => function () {
            return factory(App\Place::class)->create()->id;
        },
        'status' => $faker->word,
        'slug_field' => $faker->word,
        'type_id' => function () {
             return factory(App\Type::class)->create()->id;
        },
    ];
});

$factory->define(App\Place::class, function (Faker\Generator $faker) {
    return [
        'place_id' => $faker->randomNumber(),
        'administrative_area_level_2' => $faker->word,
        'administrative_area_level_1' => $faker->word,
        'country' => $faker->country,
        'postal_town' => $faker->word,
        'postal_code_prefix' => $faker->word,
        'postal_code' => $faker->word,
        'route' => $faker->word,
        'locality' => $faker->word,
        'premise' => $faker->word,
        'street_number' => $faker->word,
        'neighborhood' => $faker->word,
        'point_of_interest' => $faker->word,
        'natural_feature' => $faker->word,
        'administrative_area_level_3' => $faker->word,
        'postal_code_suffix' => $faker->word,
        'sublocality_level_1' => $faker->word,
        'subpremise' => $faker->word,
        'sublocality_level_5' => $faker->word,
        'sublocality_level_4' => $faker->word,
        'sublocality_level_2' => $faker->word,
        'sublocality_level_3' => $faker->word,
        'administrative_area_level_4' => $faker->word,
        'colloquial_area' => $faker->word,
        'long' => '123',
        'lat' => '123',
    ];
});

$factory->define(App\Type::class, function (Faker\Generator $faker) {
    return [
        'name' => $faker->name,
        'marker_file_name' => $faker->word,
        'background_file_name' => $faker->word,
        'description' => $faker->word,
        'ShortName' => $faker->word,
    ];
});

what do I need to do in order to get a reference to the place that is associated with the venue.

Thanks