Php 有没有办法加入拉威尔的两个系列？

假设我从HTTP请求中检索到一个数组：

$request['sports'] => [0 => 'basketball', 1 => 'bowling', 2 => 'Tennis'];

然后，在我的数据库中检索到以下集合：

$sports = [0 => 'basketball', 1 => 'bowling', 3 => 'boxing']

---

在laravel中是否有一个函数，其中“拳击”运动数据库将被删除，因为在HTTP请求的集合中找不到它。“网球”将添加到数据库中，因为它包含在HTTP请求的集合中。“basketball”和“bowling”没有任何操作，因为它们都在请求和数据库中找到了？

您可以使用collect（）helper从数组中创建集合，然后筛选所需的元素-这些元素在一个数组中，而不在另一个数组中。以下是一个例子：

$input = collect(['basketball', 'bowling', 'Tennis']);
$database = collect(['basketball', 'bowling', 'boxing']);

$added = $input->diff($database);
$removed = $database->diff($input);

$database->concat($added)->diff($removed);

// ['basketball', 'bowling', 'Tennis'];

    $request['sports'] = [0 => 'basketball', 1 => 'bowling', 2 => 'Tennis'];
    $db = [0 => 'basketball', 1 => 'bowling', 3 => 'boxing'];

    // create collections
    $requestCollection = collect($request['sports']);
    $dbCollection = collect($db);

    // filter items from db colection, that are not in request collection
    $toDelete = $dbCollection->filter(function ($item) use ($requestCollection) {
        return !$requestCollection->contains($item);
    })->each(function ($item){
        // todo: delete them
    });
    // filter items from request colection, that are not in db collection
    $toAdd = collect($requestCollection)->filter(function ($item) use ($dbCollection) {
        return !$dbCollection->contains($item);
    })->each(function ($item){
        // todo: add them
    });

    dd($toDelete, $toAdd);

dd将打印出：

Illuminate\Support\Collection {#1953
  #items: array:1 [
    3 => "boxing"
  ]
}
Illuminate\Support\Collection {#1954
  #items: array:1 [
    2 => "Tennis"
  ]
}

---

您可以使用collect（）helper从数组中创建集合，然后筛选所需的元素—这些元素在一个数组中，而不是在另一个数组中。以下是一个例子：

    $request['sports'] = [0 => 'basketball', 1 => 'bowling', 2 => 'Tennis'];
    $db = [0 => 'basketball', 1 => 'bowling', 3 => 'boxing'];

    // create collections
    $requestCollection = collect($request['sports']);
    $dbCollection = collect($db);

    // filter items from db colection, that are not in request collection
    $toDelete = $dbCollection->filter(function ($item) use ($requestCollection) {
        return !$requestCollection->contains($item);
    })->each(function ($item){
        // todo: delete them
    });
    // filter items from request colection, that are not in db collection
    $toAdd = collect($requestCollection)->filter(function ($item) use ($dbCollection) {
        return !$dbCollection->contains($item);
    })->each(function ($item){
        // todo: add them
    });

    dd($toDelete, $toAdd);

dd将打印出：

Illuminate\Support\Collection {#1953
  #items: array:1 [
    3 => "boxing"
  ]
}
Illuminate\Support\Collection {#1954
  #items: array:1 [
    2 => "Tennis"
  ]
}