How to create seed factory with related models in laravel?

Question

Laravel

I can’t understand why I can’t get such a factory:

factory(Company::class, 10)->create()->each(
            function (Company $company) {
                $company->chart()->save(factory(Chart::class)->make());
            }
        );

Company is related to Chart like this:

public function chart()
    {
        return $this->hasOne(\App\Models\Chart::class);
    }

And Chart is connected to Company like this:

public function company()
    {
        return $this->belongsTo(\App\Models\Company::class);
    }

I am getting this error:

Illuminate\Database\QueryException  : SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`db`.`companies`, CONSTRAINT `companies_chart_id_foreign` FOREIGN KEY (`chart_id`) REFERENCES `charts` (`id`)) (SQL: insert into `companies` (`name`, `admin_id`, `created_at`, `updated_at`, `chart_id`, `logo`) values (eveniet, 5, 1974-12-23 08:42:11, 1985-12-16 16:29:54, 9, perferendis))

Strange.. I thought he would first create a chart for me, then transfer the ID to the company and then save the company... But that doesn't work. How to write it correctly?

Answer 1

Save the Chart first, and only then add it to Company. Those. in save should go Chart the saved model.