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我有一个树结构的JSON应该被过滤,结果应该保留树结构。如何有效地过滤保留其现有结构的树视图?
var tree = [
{
text: "Parent 1",
nodes: [
{
text: "Child 1",
type: "Child",
nodes: [
{
text: "Grandchild 1"
type: "Grandchild"
},
{
text: "Grandchild 2"
type: "Grandchild"
}
]
},
{
text: "Child 2",
type: "Child"
}
]
},
{
text: "Parent 2",
type: "Parent"
},
{
text: "Parent 3",
type: "Parent"
}
];
实施例:
1)如果搜索查询是父1
预期结果:
[
{
text: "Parent 1",
nodes: [
{
text: "Child 1",
type: "Child",
nodes: [
{
text: "Grandchild 1"
type: "Grandchild"
},
{
text: "Grandchild 2"
type: "Grandchild"
}
]
},
{
text: "Child 2",
type: "Child"
}
]
}
]
2)如果搜索查询是儿童1
预期结果:
[
{
text: "Parent 1",
nodes: [
{
text: "Child 1",
type: "Child",
nodes: [
{
text: "Grandchild 1"
type: "Grandchild"
},
{
text: "Grandchild 2"
type: "Grandchild"
}
]
}
]
}
]
3)如果搜索查询是孙子2
预期结果:
[
{
text: "Parent 1",
nodes: [
{
text: "Child 1",
type: "Child",
nodes: [
{
text: "Grandchild 2"
type: "Grandchild"
}
]
}
]
}
]
我需要基于节点级别(型这里)保留树结构。到目前为止,我已经尝试过滤递归,但无法重新映射结果。
angular.module("myApp",[])
.filter("filterTree",function(){
return function(items,id){
var filtered = [];
var recursiveFilter = function(items,id){
angular.forEach(items,function(item){
if(item.text.toLowerCase().indexOf(id)!=-1){
filtered.push(item);
}
if(angular.isArray(item.items) && item.items.length > 0){
recursiveFilter(item.items,id);
}
});
};
recursiveFilter(items,id);
return filtered;
};
});
});
我的JSON非常大,因此基于类型的重映射预计会在过滤器本身完成。 请指教。