Question

使用：https://github.com/davejamesmiller/laravel-breadcrumbs

我可以在视图中打印面包屑，没有任何问题：

Breadcrumbs::render('category', $category);

然后，如果我想打印父类别 - 我在breadcrumbs.php中执行：

Breadcrumbs::register('category', function($breadcrumbs, $category) {
    $breadcrumbs->parent('home');
    $breadcrumbs->push('»');

    foreach($category->parent as $parent) {
        $breadcrumbs->push($parent->title, '/category/' . $parent->slug);
    }

    $breadcrumbs->push($category->title, '/category/' . $category->slug);
});

我无法打印类别父级，这是我的类别模型：

public function parent() {
    return $this->hasOne('Category', 'id', 'parent_id');
}

但是，它输出一个空的<li></li>

如何在面包屑中打印类别父级？

Answer 1

由于每个类别只有一个父级（由hasOne关系定义），因此您可以替换这些代码：

...
foreach($category->parent as $parent) {
    $breadcrumbs->push($parent->title, '/category/' . $parent->slug);
}
...

这一行：

...
$breadcrumbs->push($category->parent->title, '/category/' . $category->parent->slug);
...

Answer 2

或者你可以做一个递归函数，如：

Breadcrumbs::register('category', function($breadcrumbs, $category) {
    if ($category->parent)
        $breadcrumbs->parent('category', $category->parent);
    else
        $breadcrumbs->parent('blog');

    $breadcrumbs->push($category->title, route('category', $category->slug));
});

Laravel - 无法输出父类别的痕迹

2 个答案: