我在使用Laravel中的工厂为模型生成多个一对多关系时遇到问题。工厂似乎每个俱乐部只生成一个ClubFixture,当他们应该为每个俱乐部产生5个ClubFixtures。
模型
分会
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Club extends Model
{
//Table associated with the model
protected $table = 'clubs';
protected $fillable = ['name', 'league', 'age_group', 'colour', 'county', 'country'];
public function fixtures(){
return $this->hasMany('App\ClubFixture', 'club_id', 'id');
}
}
ClubFixture
namespace App;
use Illuminate\Database\Eloquent\Model;
class ClubFixture extends Model
{
//Table associated with the model
protected $table = 'club_fixtures';
}
模态工厂
$factory->define(App\Club::class, function (Faker\Generator $faker) {
return [
'name' => $faker->name,
'league' => $faker->word,
'age_group' => $faker->word,
'colour' => $faker->hexcolor,
'county' => $faker->state,
'country' => $faker->country,
'emblem' => $faker->imageUrl(80, 80),
'banner' => $faker->imageUrl,
'matches' => $faker->randomDigit,
'wins' => $faker->randomDigit,
'losses' => $faker->randomDigit,
];
});
$factory->define(App\ClubFixture::class, function (Faker\Generator $faker) {
return [
'club_id' => function () {
return factory(App\Club::class)->create()->id;
},
'opposition' => $faker->name,
'address' => $faker->address,
'datetime' => $faker->dateTimeBetween('now', '+30 weeks'),
'type' => $faker->randomElement(['home', 'away', 'none']),
];
});
数据库播种机
factory(App\Club::class, 100)->create()->each(function ($u) {
factory(App\ClubFixture::class, 5)->create();
});
预期结果:每个俱乐部应该有5个ClubFixtures与之关联
实际结果:有些俱乐部没有ClubFixtures,有些只有一个。
我已经尝试了这个answer,但是因为saveMany不存在且关系为空而得到错误。
您可以下载SQL结果数据库here。
有人可以告诉我这里做错了吗?
答案 0 :(得分:2)
试试这个
模态工厂
$factory->define(App\Club::class, function (Faker\Generator $faker) {
return [
'name' => $faker->name,
'league' => $faker->word,
'age_group' => $faker->word,
'colour' => $faker->hexcolor,
'county' => $faker->state,
'country' => $faker->country,
'emblem' => $faker->imageUrl(80, 80),
'banner' => $faker->imageUrl,
'matches' => $faker->randomDigit,
'wins' => $faker->randomDigit,
'losses' => $faker->randomDigit,
];
});
$factory->define(App\ClubFixture::class, function (Faker\Generator $faker) {
return [
'club_id' => function () {
return factory(App\Club::class,5)->create();
},
'opposition' => $faker->name,
'address' => $faker->address,
'datetime' => $faker->dateTimeBetween('now', '+30 weeks'),
'type' => $faker->randomElement(['home', 'away', 'none']),
];
});
答案 1 :(得分:2)
您的模型&amp; 模型工厂似乎很好,但是将它们与这个播种机一起使用:
use Illuminate\Database\Seeder;
class ClubSeeder extends Seeder
{
/**
* Run the database seeds.
*
* @return void
*/
public function run()
{
factory(App\Club::class, 100)->create()->each(function($c) {
/** @var \App\Club $c */
$c->fixtures()->saveMany(
factory(App\ClubFixture::class, 5)->make(['club_id' => NULL])
);
});
}
}
确保在俱乐部模型的saveMany()
关系方法上调用fixtures()
方法。最后,还会覆盖5个ClubFixtures的每次迭代的club_id
,以防止再创建一个俱乐部。否则你最终会得到600个俱乐部(而不是100个俱乐部)&amp; 500 ClubFixtures。
答案 2 :(得分:2)
您应该这样做
'club_id' => function () {
return factory(App\Club::class,5)->create()->id;
},
用于ClubFixture工厂。
答案 3 :(得分:2)
作为@baikho答案的替代方法,您可以直接指定外键,而不必使用->saveMany()
方法。我个人使用此功能,因为我通常不使用->hasMany()
和其他关系方法。
use Illuminate\Database\Seeder;
class ClubSeeder extends Seeder
{
/**
* Run the database seeds.
*
* @return void
*/
public function run()
{
factory(App\Club::class, 100)->create()->each(function(App\Club $c) {
factory(App\ClubFixture::class, 5)->create(['club_id' => $c->id]);
});
}
}
请注意,使用此语法时,您也想将->make()
方法更改为->create()
方法。
如果您的数据库模式不是第三种规范化形式或具有某些条件字段,这也将很有帮助。
例如,如果用户(父表)是男性,则“服装”(子表)可以具有某些与用户是女性不同的选项。这些字段没有外键,但以用户为条件。
最后,您可以删除定义$ c变量的PHPDoc注释,只需将类名直接弹出到函数参数中即可。这样更干净,更清晰。
答案 4 :(得分:1)
这是我实现这一目标的方式:-
User.php(模型)
public function UserPortfolio(){
return $this->belongsTo(UserPortfolio::class,'id','user_id');
}
public function hasOnePortfolio(){
return $this->hasOne(UserPortfolio::class,'id','user_id');
}
DatabaseSeeder(种子)
$usersCount = (int)$this->command->ask('How many users do you need ? Default : ', 10);
factory(App\Promoter::class, $usersCount)->make()->each(function ($up) {
$up->hasOnePortfolio()->save(factory(App\UserPortfolio::class)->make());
});
$this->command->info('Users Created!');
$this->command->info('Users portfolio Updated!');
UserPortfolioFactory.php(工厂)
$factory->define(UserPortfolio::class, function (Faker $faker) {
return [
'user_id' => factory('App\User')->create()->id,
......