[英]YII2 How to get data in multi level relations with hasMany relations
[英]How to get data through eloquent with multiple hasMany relations
我有下表:
users
| id | name |
--------------
| 1 | user1 |
| 2 | user2 |
countries
| id | name |
---------------------
| 1 | Netherlands |
| 2 | Germany |
| 3 | Belgium |
vat_numbers
| id | user_id | country_id | number |
---------------------------------------
| 1 | 1 | 1 | 12345
| 2 | 1 | 2 | 54321
| 3 | 2 | 1 | 12342
| 4 | 2 | 3 | 13532
楷模:
用户.php
public function vatNumbers(): HasMany
{
return $this->hasMany(VatNumber::class);
}
国家.php:
public function vatNumbers(): HasMany
{
return $this->hasMany(VatNumber::class);
}
增值税号.php:
public function user(): BelongsTo
{
return $this->belongsTo(User::class);
}
public function country(): BelongsTo
{
return $this->belongsTo(Country::class);
}
我希望用户能够为每个国家/地区创建一个 VatNumber。 我有一个包含多个 forms 的刀片文件,每个表格代表一个国家:
_form.blade.php
<form method="POST" action="{{ route('users.vat-numbers.store', ['id' => $user->id]) }}">
@csrf
<div>
<label>
<span>{{ $country->name }}</span>
</label>
<div class="col-md-9">
<button type="button" class="{{ country has vat ? 'd-none' : '' }}">Add VAT Number</button>
<input type="text" class="{{ country has vat ? '' : 'd-none' }}" name="number">
</div>
</div>
</form>
@foreach($countries as $country)
@include('_form', ['user' => $user, 'country' => $country])
@endforeach
我怎样才能得到正确的关系来检查用户是否已经拥有给定国家的增值税号?
您可以在检索国家列表时使用 filtered with
$userId = auth()->id();
$countries = Country::with(['vatNumbers' => function($vatQuery) use ($userId) {
$vatQuery->where('user_id', $userId);
})->get();
当您检查关系vatNumbers
的刀片时,如果它是一个空集合,则没有为该国家/地区输入增值税。
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