php - Laravel 使用工厂从数组中填充数据库表列

Question

我有一个看起来像这样的数据库表

|id |col2|col3|col4|
-------------------
| 1 |elm0|....|....|
| 2 |elm1|....|....|
| 3 |elm2|....|....|
|...|....|....|....|
|N+1|elmN|....|....|

我想col2用数组中的数据填充（不是随机方式）。示例数组：

$dataArray = array(elm0, elm1, elm2,...)

我创建了这个工厂：

<?php

use Faker\Generator as Faker;

$factory->define(App\Unit::class, function (Faker $faker) {

    $dataArray = array(elm0, elm1, elm2,...,elmN);

    return [
        'col2' => $dataArray[$index];
        'col3' => $faker->'whatever';
        'col4' => $faker->'whatever';
    ];

});

我怎么能做到这一点？

Answer 1

你可以这样构建：

<?php
use Faker\Generator as Faker;

$factory->define(App\Unit::class, function(Faker $faker) {

    $data = array(elm0, elm1, elm2,...,elmN);

    foreach($data as $kye=>$value) {
        $result['id'] = $key;
        $result['col2'] = $value;
        $result['col3'] = $faker->'whatever';
        $result['col4'] = $faker->'whatever';
    }

    return $result;
});

当你需要运行一个数组时，经常foreach()解决你的问题。

希望对您有所帮助。

干杯。

Answer 2

遇到了类似的问题，决定跳过工厂部分，只使用播种机。我在阅读这篇文章时得到了解决方案：一次播种多行 laravel 5 answer by lukasgeiter。

首先你用：php artisan make:seeder UnitsTableSeeder 制作播种机

然后你的播种机里会有这样的东西：

<?php

use Faker\Generator as Faker;
use Illuminate\Database\Seeder;

class UnitsTableSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
      $faker = new Faker;
      $data = ['elm0', 'elm1', 'elm2',...,'elmN'];
      $rows = [];

      foreach ($data as $element) {
        $rows[] = ['col2' => $element, 'col3' => $faker->'whatever', 'col4' => $faker->'whatever'];
      }

      App\Unit::insert($rows);
    }
}

在此之后，您可以像先生一样为您的单位表播种:)

php artisan db:seed --class=UnitsTableSeeder

Answer 3

<?php

use Faker\Generator as Faker;

$factory->define(App\Unit::class, function(Faker $faker) {

        // Grab a random unit
        $unit = App\Unit::orderByRaw('RAND()')->first();

        // Or create a new unit
        $unit = factory(App\Unit::class)->create();

        return [
            'id' => $unit->id,
            'col2' => $faker->'whatever',
            'col3' => $faker->'whatever',
            'col4' => $faker->'whatever',
        ];
    });

请检查它是否适合您。

Answer 4

如果您想从数组中获取随机元素并伪造它，那么您可以执行以下操作：

$factory->define(Rule::class, function (Faker $faker) {

    $data = [
        'age' => [
            'borrower_age_min'  => 'min:21',
            'borrower_age_max'  => 'max:75'
        ],
        'affordability' => [
            'annual_income' => 'integer|min:40000',
            'loan_amount'   => 'integer|max:3*',
        ],
        'finance' => [
            'loan_length'   => 'integer|max:12',
            'loan_amount'   => 'integer|max:500000',
        ]
    ];

    return [
        'rule'     => json_encode([
            $faker->randomElement(
                [
                    $data['age']['borrower_age_min'],
                    $data['age']['borrower_age_max'],
                    $data['affordability']['annual_income'],
                    $data['affordability']['loan_amount'],
                    $data['finance']['loan_length'],
                    $data['finance']['loan_amount']
                ]
            )
        ])
    ];
});