javascript 淘汰赛，嵌套foreach
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knockout, nested foreach
提问by Ilya
Let's I have Humans with Cats with Kittens
让我有人有猫有小猫
class Master
{
String masterName;
Cat[] cats;
}
class Cat
{
String catName;
Kitten[] kittens;
}
class Kitten
{
String kittenName;
}
Now I want show all my Kittens with Cats with Masters in html. I use
现在我想用 html 显示我所有的小猫和主人的猫。我用
<!-- ko foreach: humans -->
<!-- ko foreach: cats -->
<!-- ko foreach: kittens -->
<p data-bind="$data.kittenName"></p>
<p data-bind="$parent.catName"></p>
<p data-bind="???????"></p> <!-- How get master's name? -->
<!-- /ko -->
<!-- /ko -->
<!-- /ko -->
回答by Kyeotic
From the knockout documentation
来自淘汰赛文档
$parents This is an array representing all of the parent view models:
$parents[0] is the view model from the parent context (i.e., it's the same as $parent)
$parents[1] is the view model from the grandparent context
$parents 这是一个代表所有父视图模型的数组：
$parents[0] 是来自父上下文的视图模型（即，它与 $parent 相同）
$parents[1] 是祖父母上下文中的视图模型
You should be able to use $parents[1]to access the Master viewmodel.
您应该能够使用$parents[1]来访问主视图模型。
回答by Jibi Abraham
You can use, $rootto get to the base object - which in your case will be at the level of Master.
您可以使用,$root访问基础对象 - 在您的情况下，它将处于Master.
<!-- ko foreach: humans -->
<!-- ko foreach: cats -->
<!-- ko foreach: kittens -->
<p data-bind="$data.kittenName"></p>
<p data-bind="$parent.catName"></p>
<p data-bind="text:console.log($root, $parent, $data)"></p> <!-- How get master's name? -->
<!-- /ko -->
<!-- /ko -->
<!-- /ko -->
