Php 集合的where子句始终返回空

我有一个模型

Images

，它可以提取属性，例如

hidden

，它总是

1

或

0

我试过：

但它总是返回0

但是，如果我使用SQLite对数据库进行原始查询：

---

17行在0毫秒内从中返回：选择*from

images

WHERE

hidden

=“0”
all
将执行查询并返回一个集合。改用

dd([
    Image::where('hidden', "0")->count(),        
    Image::where('hidden', 1)->count(),        
]);

如果必须使用集合，请执行以下操作：

dd([
   $allImages->filter(function ($value) { return $value->hidden == 0; })->count(),
   $allImages->filter(function ($value) { return $value->hidden == 1; })->count()
]);

不确定集合的where是否适用于对象。
您正在对集合而不是查询生成器调用
->where（…）

// This line will return a collection -  https://laravel.com/docs/5.4/eloquent-collections
$all_images = Image::all();

如果您不需要可见和隐藏图像

// Collection does not have a method where(..)

// To get images that are "hidden" do this:
$hidden = Image::where('hidden', 0)->get(); // Again the result will be a collection

// To get images that aren't hidden do this:
$visible = Image::where('hidden', 1)->get(); // Will result in a collection

// If you need both visible and hidden you could load them all at once:
$images = Image::get();

// Then separate them with collection()->filter() - https://laravel.com/docs/5.4/collections#method-filter

$hidden = $images->filter(function ($v, $k) {
    return $images[$k]->hidden;
});

$visible = $images->filter(function ($v, $k) {
    return !$images[$k]->hidden;
});

如果您同时需要可见和隐藏图像

// Collection does not have a method where(..)

// To get images that are "hidden" do this:
$hidden = Image::where('hidden', 0)->get(); // Again the result will be a collection

// To get images that aren't hidden do this:
$visible = Image::where('hidden', 1)->get(); // Will result in a collection

// If you need both visible and hidden you could load them all at once:
$images = Image::get();

// Then separate them with collection()->filter() - https://laravel.com/docs/5.4/collections#method-filter

$hidden = $images->filter(function ($v, $k) {
    return $images[$k]->hidden;
});

$visible = $images->filter(function ($v, $k) {
    return !$images[$k]->hidden;
});

集合类确实有一个where方法；哦对不起，我不知道。很好的发现。