Laravel 工厂和播种：数组的静态数组答案

【问题标题】：Laravel Factories and Seeding: Static array of arraysLaravel 工厂和播种：数组的静态数组
【发布时间】：2019-09-29 16:54:46
【问题描述】：

对于我的一些表，我想插入具有特定数据的固定数量的行。

这是我的分类工厂：

$factory->define(Category::class, function (Faker $faker) {
    return [
        [
            'name' => 'Politics',
            'slug' => 'politics',
            'description' => 'To discuss politics'
        ],
        [
            'name' => 'News and Events',
            'slug' => 'news',
            'description' => 'To discuss news and world events'
        ],
        [
            'name' => 'Food and Cooking',
            'slug' => 'cooking',
            'description' => 'To discuss cooking and food'
        ],
        [
            'name' => "Animals and Nature",
            'slug' => 'animals-nature',
            'description' => 'To discuss politics'
        ]
    ];
});

这是播种机：

public function run() {
   factory(App\Category::class, 1)->create();
}

我收到此错误：preg_match() expects parameter 2 to be string, array given

有没有办法使用种子和工厂将固定数量的静态信息插入到某些表中？

【问题讨论】：

Faker 用于制作虚假数据.. 改用播种机
@ZeroOne，我刚刚从另一个使用 Faker 的工厂复制了一个工厂。旨在删除它

标签： php laravel laravel-5 seeding laravel-seeding

【解决方案1】：

@Prafulla Kumar Sahu 的答案是播种机，但您可以通过 override your factory 值：

$category = factory(App\Category::class)->make([
                'name' => 'Politics',
                'slug' => 'politics',
                'description' => 'To discuss politics'
            ]);
$category = factory(App\Category::class)->make([
                'name' => 'News and Events',
                'slug' => 'news',
                'description' => 'To discuss news and world events'
            ]);
$category = factory(App\Category::class)->make([
                'name' => 'Food and Cooking',
                'slug' => 'cooking',
                'description' => 'To discuss cooking and food'
            ]);
$category = factory(App\Category::class)->make([
                'name' => "Animals and Nature",
                'slug' => 'animals-nature',
                'description' => 'To discuss politics'
            ]);

【讨论】：

【解决方案2】：

我认为您想使用带有静态值的 Seeder，如果我是正确的，您应该使用

定义类别播种器

<?php
use Illuminate\Database\Seeder;
use App\Category;

class CategorySeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        $categories = [
             [
            'name' => 'Politics',
            'slug' => 'politics',
            'description' => 'To discuss politics'
        ],
        [
            'name' => 'News and Events',
            'slug' => 'news',
            'description' => 'To discuss news and world events'
        ],
        [
            'name' => 'Food and Cooking',
            'slug' => 'cooking',
            'description' => 'To discuss cooking and food'
        ],
        [
            'name' => "Animals and Nature",
            'slug' => 'animals-nature',
            'description' => 'To discuss politics'
        ]
        ];

        foreach ($categories as $category) {
            Category::create($category);
        }
    }
}

在 DatabaseSeeder 中

<?php

use Illuminate\Database\Seeder;

class DatabaseSeeder extends Seeder
{
    /**
     * Seed the application's database.
     *
     * @return void
     */
    public function run()
    {
        $this->call(CategorySeeder::class);
    }
}

现在运行php artisan db:seed，它就会完成。

【讨论】：

谢谢！我似乎误解了工厂的必要性。这工作得很好
我倾向于使用 Eloquent 的 firstOrCreate 方法让播种者在错误地调用 php artisan db:seed 时避免重复，例如：foreach ($categories as $category) { Category::firstOrCreate(array_only($category, ['name', 'slug']), array_except($category, ['name', 'slug])); } 假设 name 和 slug 列是唯一的。
@zoltalar 没关系，当你放置静态值时，你知道大部分时间你在放置什么。