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在laravel中使用pluck()helper函数

laravel-collection laravel-eloquent laravel-5.5 laravel

Nitish Kumar · 技术社区 · 8 年前

我正在构建一个小应用程序 laravel 5.5 我从以下表格中获得了一个包含这些信息的多个用户的列表:

{
    "name":"Test",
    "description":"Test the description",
    "users":[
        {
            "value":"XYZabc123",
            "name":"Nitish Kumar",
            "email":"nitishkumar@noeticitservices.com"
        },
        {
            "value":"MFnjMdNz2DIzMJJS",
            "name":"Rajesh Kumar Sinha",
            "email":"rajesh@noeticitservices.com"
        }
    ]
}

我只是想得到 value 通过键形成用户阵列 laravel collection 类似这样:

$userIds = $request->users->pluck('value');

这样我就可以对它们进行查询:

$user = User::all()->whereIn('unique_id', $userIds);

也许我大部分事情都做错了,但我的主要动机是或 helper 函数并为此生成更清晰的代码:

$teamData['name'] = $request->name;
$teamData['description'] = $request->description;
$teamData['unique_id'] = str_random();

$users = $request->users;

$team = Team::create($teamData);

if($team)
{
    $userIds = [];

    foreach ($users as $user)
    {
        $getUser = User::where('unique_id', $user['value'])->get()->first();
        $userIds [] = $getUser->id;
    }

    $team->users()->attach($userIds);

    return response()->json(['message' => 'Created Successfully'], 200);
}

return response()->json(['message' => 'Something went wrong'], 500);

我仍在学习收藏,如有任何建议,不胜感激。谢谢

2 回复 | 直到 8 年前

nmfzone 8 年前

数据来自 $request (form)不是集合。这是一个数组。如果需要将其转换为集合,则应首先将其转换为集合。

附言 . 如果在一个方法中有多个DB操作,最好有DB事务。

\DB::transaction(function () use ($request) {
    // convert it to collection
    $users = collect($request->users);

    $team = Team::create([
        'name' => $request->name,
        'description' => $request->description,
        'unique_id' => str_random(),
    ]);

    $team->users()->attach($users->pluck('value')->toArray()); 
});

// HTTP Created is 201 not 200
return response()->json(['message' => 'Created Successfully'], 201);

或者你需要这样的东西:

return \DB::transaction(function () use ($request) {
    $users = collect($request->users);

    $team = Team::create([
        'name' => $request->name,
        'description' => $request->description,
        'unique_id' => str_random(),
    ]);

    $team->users()->attach($users->pluck('value')->toArray());

    return response()->json([
        'message' => 'Created Successfully',
        'data' => $team,
    ], 201); 
});

Christopher Francisco 8 年前

我只想通过laravel集合从用户数组中获取值键

只需使用 map 然后:

$userIds = $request->users->map(function($user) {
    return $user->value;  // or $user['value'] ? not sure if this is an array
});

编辑:

如果 $request->users 不是集合,请在调用map之前将其设置为集合:

$users = collect($request->users);

$userIds = $users->map(function($user) {
    return $user->value;  // or $user['value'] ? not sure if this is an array
});