Laravel Collections 除了没有按预期工作
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Laravel Collections except not working as expected
提问by HymanSlayer94
I create a collection for list of all address of a particular user and call it as:
我为特定用户的所有地址列表创建了一个集合，并将其称为：
$addresses = collect($user->GetAddress);
$addresses = $addresses->where('deleted', 0);
$addresses = $addresses->except(['deleted', 'created_at', 'updated_at']);
I get the output like:
我得到如下输出：
[
{
"id": 1,
"user_id": 1,
"name": "mr.test",
"line1": "test1",
"line2": "test2",
"pincode": 100,
"city": "test3",
"state": "test4",
"mobile": "test5",
"default": 0,
"deleted": 0,
"created_at": "2017-02-23 09:20:09",
"updated_at": "2017-02-23 09:20:09"
}
]
It still returns the fields that I do an except on. What am I doing wrong?
它仍然返回我执行的字段除外。我究竟做错了什么？
I even tried these:
我什至尝试过这些：
$addresses = $addresses->each(function ($item, $key) {
return $item->except(['deleted', 'created_at', 'updated_at']);
});
and
和
$addresses = $addresses->each->except(['deleted', 'created_at', 'updated_at']);
回答by Jerodev
exceptonly works when you have a single array with keys, not for a nested array. Your solution with the each function should work, but I think you have to cast $itemto a collection first.
except仅当您有一个带键的数组时才有效，不适用于嵌套数组。您使用 each 函数的解决方案应该可以工作，但我认为您必须先$item转换为集合。
Like so:
像这样：
$addresses = $addresses->map(function ($item, $key) {
return collect($item)->except(['deleted', 'created_at', 'updated_at'])->toArray();
});
回答by KimWordWax
The exceptmethod works on the outer array/collection i.e. on the keys of the collection. So you'd have to use an eachoperator
该except方法适用于外部数组/集合，即集合的键。所以你必须使用each运算符
The code below does not work because the $itemis not a collection, but a model.
下面的代码不起作用，因为$item它不是一个集合，而是一个模型。
$addresses = $addresses->each(function ($item, $key) {
return $item->except(['deleted', 'created_at', 'updated_at']);
});
Solution 1
方案一
One solution to your problem would be to use the selectmethod like this (provided GetAddresses is a real laravel relationship).
您的问题的一种解决方案是使用这样的select方法（前提是 GetAddresses 是真正的 laravel关系）。
$user->GetAddresses()->select(['col1', 'col2'])->get()
$user->GetAddresses()->select(['col1', 'col2'])->get()
Solution 2
解决方案2
Another would be to map your output like so:
另一种方法是像这样映射您的输出：
$addresses = $addresses->map(function ($item, $key) {
return [
"id": $item->id,
"user_id": $item->user_id,
"name": $item->name,
"line1": $item->line1,
// etc...
];
});
Solution 3
解决方案3
Yet another solution would be to utilize the $hiddenattribute (see this link) on the model and use to to toArray()on each item. That would hide the attributes you have entered in the $hiddeninstance variable
另一种解决方案是利用模型上的$hidden属性（请参阅此链接）并toArray()在每个项目上使用 to 。这将隐藏您在$hidden实例变量中输入的属性
