在我的代码中,每个公司都属于一个程序包,并且具有程序包用法 class Package扩展了Model。 包型号:
protected $fillable =[
'name',
'daily_cv_view',
'monthly_cv_view',
'per_job_post_cv_view',
'active_job_post_limit',
'question_per_job_post_limit',
'package_lifetime',
'job_post_lifetime_limit',
'price'
];
public function companies()
{
return $this->hasMany('App\Models\Company');
}
public function packageUsages()
{
return $this->hasMany('App\Models\package_usage');
}
公司型号
public function package()
{
return $this->belongsTo('App\Models\Package', 'package_id');
}
packageUsage模型
public function company()
{
return $this->belongsTo('App\Models\Company');
}
public function package()
{
return $this->belongsTo('App\Models\Package');
}
在我的数据库播种机中,我正在尝试为每个创建的公司构建一个软件包。所以看起来像这样:
$companies=factory(App\Models\Company::class, 20)->create()->each(function ($company) {
$company->users()->save(factory(App\Models\User::class)->make());
$company->events()->save(factory(\App\Models\Event::class)->make());
});
foreach ($companies as $company)
$company->packageUsages()->save(factory(\App\Models\PackageUsage::class)->make([
'company_id'=>$company->id,
'package_id'=>$company->first()->package_id
]));
最后是我的步调用法虚幻的画面:
$factory->define(App\Models\PackageUsage::class, function (Faker $faker) {
$companyId= $faker->randomElement(\App\Models\Company::all()->pluck('id')->toArray());
$company= App\Models\Company::find($companyId);
$package=$company->package;
$dailyCvView=$package->first()->daily_cv_view;
return [
'company_id'=>$company,
'package_id'=>$package,
'daily_cv_view'=>$faker->numberBetween($min=0 , $max=$dailyCvView ),
'monthly_cv_view'=>$faker->numberBetween($min=$dailyCvView , $max=$package->monthly_cv_view ),
'active_job_post_count'=>$company->jobPosts->count(),
'expiration_date'=>$faker->dateTimeBetween($min='now', $max='+ 30 days')
];
});
公司工厂:
$factory->define(\App\Models\Company::class, function (Faker $faker) {
return [
'name'=>$faker->company,
'company_size'=>$faker->randomElement(['10','50','100','200']),
'slogan'=>'باما کار کنید',
'website'=>$faker->domainName,
'logo'=>'/images/companies/avatar',
'message_title'=>'ما در اینجا.....',
'message_content'=>$faker->paragraph('10'),
'main_photo'=>'/images/companies/mainphotos/avatar',
'about_us'=>$faker->paragraph('10'),
'why_us'=>$faker->paragraph('10'),
'recruiting_steps'=>$faker->paragraph('10'),
'address'=>$faker->address,
'email'=>$faker->safeEmail,
'phone_number'=>$faker->numberBetween(10,100),
'location'=>$faker->city,
'package_id'=>$faker->randomElement(\App\Models\Package::all()->pluck('id')->toArray())
];
});
当我运行它时,它返回错误:
Illuminate\Database\QueryException : SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`balatar`.`package_usages`, CONSTRAINT `package_usages_package_id_foreign` FOREIGN KEY (`package_id`
) REFERENCES `packages` (`id`)) (SQL: insert into `package_usages` (`company_id`, `package_id`, `daily_cv_view`, `monthly_cv_view`, `active_job_post_count`, `expiration_date`, `updated_at`, `created_at`) values (4, 4, 12, 484, 0, 2018-09-16 07:26:11, 2018-08-30
03:45:22, 2018-08-30 03:45:22))
当我检查数据库时,我发现它为每个公司ID和软件包ID都创建了3个软件包。因为我认为当它尝试使用两个ID为4且仅插入3个程序包来构建它时,第四个外键失败。 我的代码有什么问题?
答案 0 :(得分:1)
我认为您的第一个错误是在数据库设计中。您的公司将有一个以上的软件包,据我了解,当时只有一个有效的软件包。因此,需要在companies
和packages
表之间创建多对多关系,如下所示:
Schema::create('rel_company_package', function (Blueprint $table) {
$table->increments('id');
$table->timestamps();
$table->unsignedInteger('package_id');
$table->unsignedInteger('company_id');
$table->timestamp('activated_at')->nullable();
$table->timestamp('expires_at')->nullable();
$table->boolean('is_active')->nullable();
$table->unsignedInteger('nubmer_of_remaining_job_posts');
});
注意:您应该在决定激活该软件包后立即用适当的值填写
activated_at
,expires_at
和is_active
。此外,您还应该在软件包分配时填写
nubmer_of_remaining_job_posts
。
您决定要播种的日志数据是您可能不依赖的生产时间,因为它很容易变得庞大,并且需要大量资源来计算所需的内容。顺便说一句,日志数据(PackageUsage
)应该只保留数据透视表的(rel_company_package
)id
。
直接返回您的错误:
首先,在您的company factory
中加载所有程序包并随机选择一个(而package usage factory
是),最好不要这样做,而是要求MySQL为您随机选择一个程序包>
对于随机公司:
$company = $\App\Models\Company::query()->inRandomOrder->first();
// and use $company->id
对于随机包装:
$package = \App\Models\Package::query()->inRandomOrder()->frist();
// and use $package->id
另一点是,您应该创建一个PackageUsage
实例,如下所示:
$company->packageUsages()->save(factory(\App\Models\PackageUsage::class)->make([
'package_id' => $company->first()->package_id
]));
它不需要再次传递company_id
。似乎您错过了packageUsages()
模型中的Company
方法,它应该是:
public function packagesUsage()
{
return $this->hasMany('\App\Models\PackageUsage', 'company_id')
}
您可能会因键入错误而将comapny_id
替换为package_id
。
但是正如我最初提到的,您最好首先修复您的结构。