我现在尝试了很多东西，但没有取得多大成功。让我们假设我有一个这样的列表：
[
{
"name": "Africa",
"translation": "Afrika",
"someNum": 87207,
"countries": [
{
"name": "Algeria",
"translation": "Algerien",
"someNum": 58020,
"countries": null
},
{
"name": "Morocco",
"translation": "Marokko",
"someNum": 27314,
"countries": null
},
{
"name": "Libya",
"translation": "Lybien",
"someNum": 77788,
"countries": null
},
{
"name": "Somalia",
"translation": "Somalia",
"someNum": 17945,
"countries": null
},
{
"name": "Kenya",
"translation": "Kenia",
"someNum": 12505,
"countries": null
},
{
"name": "Mauritania",
"translation": "Mauretanien",
"someNum": 25787,
"countries": null
},
{
"name": "South Africa",
"translation": "S\u00fcdafrika",
"someNum": 39997,
"countries": null
}
]
},
{
"name": "America",
"translation": "Amerika",
"someNum": 48450,
"countries": [
{
"name": "North America",
"translation": "Nordamerika",
"someNum": 23397,
"countries": [
{
"name": "Canada",
"translation": "Kanada",
"someNum": 58709,
"countries": null
},
{
"name": "USA",
"translation": "USA",
"someNum": 64725,
"countries": [
{
"name": "New York",
"translation": "New York",
"someNum": 50202,
"countries": null
},
{
"name": "California",
"translation": "Kalifornien",
"someNum": 92801,
"countries": [
{
"name": "Los Angeles",
"translation": "Los Angeles",
"someNum": 78283,
"countries": null
},
{
"name": "San Diego",
"translation": "San Diego",
"someNum": 30373,
"countries": null
},
{
"name": "Sacramento",
"translation": "Sacramento",
"someNum": 50721,
"countries": null
},
{
"name": "San Francisco",
"translation": "San Francisco",
"someNum": 65772,
"countries": null
},
{
"name": "Bakersville",
"translation": "Bakersville",
"someNum": 20390,
"countries": null
}
]
},
{
"name": "Lousiana",
"translation": "Lousiana",
"someNum": 26245,
"countries": null
},
{
"name": "Texas",
"translation": "Texas",
"someNum": 57720,
"countries": null
},
{
"name": "Nevada",
"translation": "Nevada",
"someNum": 41399,
"countries": null
},
{
"name": "Montana",
"translation": "Montana",
"someNum": 97221,
"countries": null
},
{
"name": "Virginia",
"translation": "Virginia",
"someNum": 64101,
"countries": null
}
]
}
]
},
{
"name": "Middle America",
"translation": "Mittelamerika",
"someNum": 60813,
"countries": [
{
"name": "Mexico",
"translation": "Mexiko",
"someNum": 97953,
"countries": null
},
{
"name": "Honduras",
"translation": "Honduras",
"someNum": 40591,
"countries": null
},
{
"name": "Guatemala",
"translation": "Guatemala",
"someNum": 41592,
"countries": null
}
]
},
{
"name": "South America",
"translation": "S\u00fcdamerika",
"someNum": 61507,
"countries": null
}
]
},
{
"name": "Asia",
"translation": "Asien",
"someNum": 38179,
"countries": [
{
"name": "China",
"translation": "China",
"someNum": 47266
},
{
"name": "India",
"translation": "Indien",
"someNum": 33424,
"countries": null
},
{
"name": "Malaysia",
"translation": "Malaysia",
"someNum": 38010,
"countries": null
},
{
"name": "Thailand",
"translation": "Thailand",
"someNum": 41356,
"countries": null
},
{
"name": "Vietnam",
"translation": "Vietnam",
"someNum": 79489,
"countries": null
},
{
"name": "Singapore",
"translation": "Singapur",
"someNum": 53176,
"countries": null
},
{
"name": "Indonesia",
"translation": "Indonesien",
"someNum": 89895,
"countries": null
},
{
"name": "Mongolia",
"translation": "Mongolei",
"someNum": 42783,
"countries": null
}
]
},
{
"name": "Europe",
"translation": "Europa",
"someNum": 84723,
"countries": [
{
"name": "North",
"translation": "Nord",
"someNum": 16833,
"countries": [
{
"name": "Norway",
"translation": "Norwegen",
"someNum": 11817,
"countries": null
},
{
"name": "Sweden",
"translation": "Schweden",
"someNum": 38210,
"countries": null
},
{
"name": "Finland",
"translation": "Finnland",
"someNum": 10669,
"countries": null
}
]
},
{
"name": "East",
"translation": "Ost",
"someNum": 28434,
"countries": [
{
"name": "Romania",
"translation": "Rum\u00e4nien",
"someNum": 45122,
"countries": null
},
{
"name": "Bulgaria",
"translation": "Bulgarien",
"countries": null
},
{
"name": "Poland",
"translation": "Polen",
"someNum": 84183,
"countries": null
}
]
},
{
"name": "South",
"translation": "S\u00fcd",
"someNum": 71856,
"countries": [
{
"name": "Italy",
"translation": "Italien",
"someNum": 76406,
"countries": null
},
{
"name": "Greece",
"translation": "Griechenland",
"someNum": 18189,
"countries": null
},
{
"name": "Spain",
"translation": "Spanien",
"someNum": 36148,
"countries": null
}
]
},
{
"name": "West",
"translation": "West",
"someNum": 33487,
"countries": [
{
"name": "France",
"translation": "Frankreich",
"someNum": 72622,
"countries": null
},
{
"name": "England",
"translation": "England",
"someNum": 51927,
"countries": null
},
{
"name": "Portugal",
"translation": "Portugal",
"someNum": 25502,
"countries": null
}
]
}
]
},
{
"name": "Oceania",
"translation": "Ozeanien",
"someNum": 69844,
"countries": [
{
"name": "Australia",
"translation": "Australien",
"someNum": 17211,
"countries": null
},
{
"name": "New Zealand",
"translation": "Neuseeland",
"someNum": 87401,
"countries": null
}
]
},
{
"name": "Arctica",
"translation": "Arktis",
"someNum": 67183,
"countries": null
},
{
"name": "Antarctica",
"translation": "Antarktis",
"someNum": 92518,
"countries": null
}
]
我努力实现的目标是找到符合我的搜索条件的所有父母和/或孩子，同时保持整棵树的完整。
我们说我正在搜索Australia作为属性name的值。预期结果将是：
- Oceania
-- Australia
但我得到的是
- Oceania
-- Australia
-- New Zealand
另一个例子：我正在搜索Kalifornien作为属性translation的值。预期结果将是：
- America
-- North America
--- USA
---- California
----- Bakersville
----- San Diego
----- Sacramento
----- San Francisco
----- Los Angeles
但实际结果绝对不是你所期望的。
所以我遇到的主要问题是原始的 Angular 过滤器没有正确处理孩子。
我已经设置了一个Plunker来演示问题：https://plnkr.co/edit/3FavpC8XB3hTvT94fZli?p=preview
我还可以更改 JSON 数据的格式，如果这样可以更轻松地实现正确的过滤。
编辑：
我取得了部分成功：https://plnkr.co/edit/lDoUK3?p=preview
还剩下一个问题。如果我搜索（例如）加利福尼亚州，则缺少名为California的对象的countries属性中的对象。所以最后一项是加利福尼亚（到目前为止还不错），但我还需要Bakersville，San Diego＆amp;合。在它之下。
答案 0 :(得分：0)
如果要获取列表中所选元素的子项，则应在过滤后添加其父项（或某些父项的父项）必须出现在列表中的项。为此，我建议您创建一个递归函数：
this.getSelectedElementList = function(list, element) {
var result;
for (var i in list) {
if (list[i].name.toLowerCase().indexOf(element) > -1) {
return list[i];
} else {
if (list[i].countries && list[i].countries.length) {
result = this.getSelectedElementList(list[i].countries, element);
if (typeof result !== 'undefined') {
return result;
}
}
}
}
return result;
};
你可以在preFilter函数中调用它两次。第一次获取父对象：
var parentList = _self.getSelectedElementList(_self.listItems, _self.filterQuery.toLowerCase());
第二个检查当前项目是否在该对象内：
if (typeof parentList !== 'undefined' && parentList.countries && parentList.countries.length && typeof _self.getSelectedElementList(parentList.countries, item.name.toLowerCase()) !== 'undefined') {
path.push(item);
}
由于您目前只按名称过滤，我的提案就是这样做的。我还更新了您的Plunkr