Factory firstOrCreate method

[gilbitron]

It would be great if Eloquent model factories could have a firstOrCreate method. A use case for this would be in seeders when you might want to use model factories but want to be able to re-run seeders without duplicating data.

[gilbitron]

For anyone looking for a temporary solution, I just whipped up this:

Factory::macro('firstOrCreate', function (array $attributes = [], array $values = [], ?Model $parent = null) {
    if ($existing = $this->model::where($attributes)->first()) {
        return $existing;
    }

    return $this->create([...$attributes, ...$values], $parent);
});

[nhalstead]

I used the following to create an instance of the model, and call the native eloquent method while still providing the faker data.

<?php

Factory::macro('updateOrCreate', function (array $attributes = [], array $values = []) {
    /**
     * https://laravel.com/api/master/Illuminate/Database/Eloquent/Builder.html
     * @var \Illuminate\Database\Eloquent\Builder $model
     * @var \Illuminate\Database\Eloquent\Factories\Factory $this
     */
    $model = $this->modelName();
    $fake = $this->definition();

    // Don't use fake values if filled from the attributes field.
    foreach (array_keys($attributes) as $key) {
        unset($fake[$key]);
    }

    $values = array_merge($fake, $values);
    return $model::updateOrCreate($attributes, $values);
});

?>