Laravel Eloquent Pluck 不会丢失钥匙
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Laravel Eloquent Pluck without losing the key
提问by Coder
I have the following collection in Laravel:
我在 Laravel 中有以下集合：
["TheNumbers":[{"episodeID":16818,"episodeNumber":100,"created_at":null,"updated_at":null},{"episodeID":16818,"episodeNumber":210,"created_at":"2017-02-20 21:30:38","updated_at":"2017-02-20 21:30:38"}]
If I run the following code:
如果我运行以下代码：
$TheEpisode->TheNumbers->pluck('episodeNumber');
I will get the following result:
我会得到以下结果：
[100,210]
I would like to keep the keys for each number, how can I achieve this?
我想保留每个号码的密钥，我怎样才能做到这一点？
EDIT: EXPECTED RESULT:
编辑：预期结果：
This is my expected result:
这是我的预期结果：
[{"episodeNumber":100},{"episodeNumber":210}]
PHILIS PETERS (improved)
菲利斯·彼得斯（改进版）
TheEpisode->TheNumbers->reduce(function ($result, $episode) {
$episodeData = (collect())->put('episodeNumber', $episode['episodeNumber']);
$result[] = $episodeData;
return $result;
}));
采纳答案by Mike Barwick
Try something like this, it should work using map...
尝试这样的事情，它应该可以使用map...
return $TheEpisode->TheNumbers->map(function ($episode) {
return ['episodeNumber' => $episode['episodeNumber']];
});
回答by Rwd
Pluckcan take two params. The second of which is what the value can be keyed by.
Pluck可以带两个参数。第二个是值可以通过什么键控。
You should be able to do:
你应该能够做到：
$TheEpisode->TheNumbers->pluck('episodeNumber', 'episodeID');
Hope this helps!
希望这可以帮助！
回答by shxfee
This can be simply achieved by passing a second argument to pluck. From the documentation:
这可以通过向pluck传递第二个参数来简单地实现。从文档：
You may also specify how you wish the resulting collection to be keyed:
您还可以指定您希望如何对结果集合进行键控：
$plucked = $collection->pluck('name', 'product_id');
$plucked->all();
// ['prod-100' => 'Desk', 'prod-200' => 'Chair']
回答by wujt
$collection->forget(['created_at', 'updated_at]);
This will simply left two first key-value pairs. Worth to keep in mind:
这将只留下两个第一个键值对。值得牢记：
forget does not return a new modified collection; it modifies the collection it is called on.
忘记不会返回一个新的修改过的集合；它修改它被调用的集合。
This should work properly:
这应该可以正常工作：
$collection->only(['episodeID', 'episodeNumber']);
回答by luke glenn jordan
Try using
尝试使用
$TheEpisode->TheNumbers->lists('episodeNumber');
the key will remain.
钥匙将保留。
回答by Phillis Peters
Try using mapWithKeyslike this:
尝试使用mapWithKeys这样的：
$TheEpisode->TheNumbers->mapWithKeys(function ($theNumber) {
return ['episodeNumber' => $theNumber['episodeNumber']
});
I assume you want the result like this:
我假设你想要这样的结果：
"TheNumbers":['episodeNumber':100,'episodeNumber':210]
"TheNumbers":['episodeNumber':100,'episodeNumber':210]
回答by flakerimi
For sake of updated Laravel, I tried all and I found
为了更新 Laravel，我尝试了所有，我发现
return Model::get(['name','id'])
return Model::get(['name','id'])
will give reduced results with key => value.
将使用 key => value 减少结果。
