1
我想从我的sql查询中构建分层数据结构。 继this post之后从平面对象中构建分层JSON对象后，我尝试在对象层次中创建具有更多属性的4级层次结构，但不需要子属性。Node.js - 将平面json转换为没有'parent'，'child'属性的层次结构json
我怎样才能做到这一点？
这里是我的JavaScript（的NodeJS）代码：
var levels = ["counties_id","district_id", "municipalities_id", "institutes_id"];
data.forEach(function(d){
var depthCursor = newData.counties;
levels.forEach(function(property, depth){
var index;
depthCursor.forEach(function(child,i){
if (d[property] == child.counties_id) index = i;
});
if (isNaN(index)) {
var propname = levels[depth];
var obj = {};
obj[propname] = d[property];
obj["children"] = [];
depthCursor.push(obj);
index = depthCursor.length - 1;
}
depthCursor = depthCursor[index].children;
if (depth === levels.length - 1) {
depthCursor.push({ id : d.id, name : d.name, name_H : d.name_h });
}
});
});
第一级是确定的，因为这equalation检查相同的第一级别属性：
if (d[property] == child.counties_id) index = i;
我怎样才能chect二路，3TH和第四级相同的情况？
这是平坦的对象，它一直努力：我目前的代码
[
{
"counties_h":"Megye 1",
"counties_en":"Coun 1",
"counties_id":"1",
"district_h":"Korz 1",
"district_en":"Dist 1",
"district_id":"101",
"municipalities_h":"Onk 1",
"municipalities_en":"Mun 1",
"municipalities_id":"asdf",
"institutes_h":"Int 1",
"institites_en":"Inst 1",
"institutes_id":"1"
},
{
"counties_h":"Megye 1",
"counties_en":"Coun 1",
"counties_id":"1",
"district_h":"Korz 1",
"district_en":"Dist 1",
"district_id":"101",
"municipalities_h":"Onk 1",
"municipalities_en":"Mun 1",
"municipalities_id":"asdf",
"institutes_h":"Int 2",
"institites_en":"Inst 2",
"institutes_id":"2"
},
{
"counties_h":"Megye 1",
"counties_en":"Coun 1",
"counties_id":"1",
"district_h":"Korz 1",
"district_en":"Dist 1",
"district_id":"101",
"municipalities_h":"Onk 2",
"municipalities_en":"Mun 2",
"municipalities_id":"sdfg",
"institutes_h":"Int 1",
"institites_en":"Inst 1",
"institutes_id":"1"
},
{
"counties_h":"Megye 1",
"counties_en":"Coun 1",
"counties_id":"1",
"district_h":"Korz 1",
"district_en":"Dist 1",
"district_id":"101",
"municipalities_h":"Onk 2",
"municipalities_en":"Mun 2",
"municipalities_id":"sdfg",
"institutes_h":"Int 2",
"institites_en":"Inst 2",
"institutes_id":"2"
},
{
"counties_h":"Megye 1",
"counties_en":"Coun 1",
"counties_id":"1",
"district_h":"Korz 2",
"district_en":"Dist 2",
"district_id":"102",
"municipalities_h":"Onk 1",
"municipalities_en":"Mun 1",
"municipalities_id":"dfgh",
"institutes_h":"Int 1",
"institites_en":"Inst 1",
"institutes_id":"1"
},
{
"counties_h":"Megye 1",
"counties_en":"Coun 1",
"counties_id":"1",
"district_h":"Korz 2",
"district_en":"Dist 2",
"district_id":"102",
"municipalities_h":"Onk 1",
"municipalities_en":"Mun 1",
"municipalities_id":"dfgh",
"institutes_h":"Int 2",
"institites_en":"Inst 2",
"institutes_id":"2"
},
{
"counties_h":"Megye 2",
"counties_en":"Coun 2",
"counties_id":"2",
"district_h":"Korz 2",
"district_en":"Dist 2",
"district_id":"202",
"municipalities_h":"Onk 1",
"municipalities_en":"Mun 1",
"municipalities_id":"fghj",
"institutes_h":"Int 1",
"institites_en":"Inst 1",
"institutes_id":"1"
},
{
"counties_h":"Megye 2",
"counties_en":"Coun 2",
"counties_id":"2",
"district_h":"Korz 2",
"district_en":"Dist 2",
"district_id":"202",
"municipalities_h":"Onk 1",
"municipalities_en":"Mun 1",
"municipalities_id":"fghj",
"institutes_h":"Int 2",
"institites_en":"Inst 2",
"institutes_id":"2"
}
]
输出：
{
"counties":[
{
"counties_id":"1",
"children":[
{
"district_id":"101",
"children":[
{
"municipalities_id":"asdf",
"children":[
{
"institutes_id":"1",
"children":[
{
}
]
}
]
}
]
},
{
"district_id":"101",
"children":[
{
"municipalities_id":"asdf",
"children":[
{
"institutes_id":"2",
"children":[
{
}
]
}
]
}
]
},
{
"district_id":"101",
"children":[
{
"municipalities_id":"sdfg",
"children":[
{
"institutes_id":"1",
"children":[
{
}
]
}
]
}
]
},
{
"district_id":"101",
"children":[
{
"municipalities_id":"sdfg",
"children":[
{
"institutes_id":"2",
"children":[
{
}
]
}
]
}
]
},
{
"district_id":"102",
"children":[
{
"municipalities_id":"dfgh",
"children":[
{
"institutes_id":"1",
"children":[
{
}
]
}
]
}
]
},
{
"district_id":"102",
"children":[
{
"municipalities_id":"dfgh",
"children":[
{
"institutes_id":"2",
"children":[
{
}
]
}
]
}
]
}
]
},
{
"counties_id":"2",
"children":[
{
"district_id":"202",
"children":[
{
"municipalities_id":"fghj",
"children":[
{
"institutes_id":"1",
"children":[
{
}
]
}
]
}
]
},
{
"district_id":"202",
"children":[
{
"municipalities_id":"fghj",
"children":[
{
"institutes_id":"2",
"children":[
{
}
]
}
]
}
]
}
]
}
]
}
而这正是我想要的：
{
"counties":[
{
"counties_id":"1",
"counties_h":"Megye 1",
"counties_en":"Coun 1",
"districts":[
{
"district_id":"101",
"district_h":"Korz 1",
"district_en":"Dist 1",
"municipalities":[
{
"municipalities_id":"asdf",
"municipalities_h":"Onk 1",
"municipalities_en":"Mun 1",
"institutes":[
{
"institutes_id":"1",
"institutes_h":"Int 1",
"institutes_en":"Inst 1"
},
{
"institutes_id":"2",
"institutes_h":"Int 2",
"institutes_en":"Inst 2"
}
]
},
{
"municipalities_id":"sdfg",
"municipalities_h":"Onk 2",
"municipalities_en":"Mun 2",
"institutes":[
{
"institutes_id":"3",
"institutes_h":"Int 1",
"institutes_en":"Inst 1"
},
{
"institutes_id":"4",
"institutes_h":"Int 2",
"institutes_en":"Inst 2"
}
]
}
]
},
{
"district_id":"102",
"district_h":"Korz 2",
"district_en":"Dist 2",
"municipalities":[
{
"municipalities_id":"dfgh",
"municipalities_h":"Onk 1",
"municipalities_en":"Mun 1",
"institutes":[
{
"institutes_id":"5",
"institutes_h":"Int 1",
"institutes_en":"Inst 1"
},
{
"institutes_id":"6",
"institutes_h":"Int 2",
"institutes_en":"Inst 2"
}
]
}
]
}
]
},
{
"counties_id":"2",
"counties_h":"Megye 2",
"counties_en":"Coun 2",
"districts":[
{
"district_id":"202",
"district_h":"Korz 2",
"district_en":"Dist 2",
"municipalities":[
{
"municipalities_id":"fghj",
"municipalities_h":"Onk 1",
"municipalities_en":"Mun 1",
"institutes":[
{
"institutes_id":"7",
"institutes_h":"Int 1",
"institutes_en":"Inst 1"
},
{
"institutes_id":"8",
"institutes_h":"Int 2",
"institutes_en":"Inst 2"
}
]
}
]
}
]
}
]
}
JSON应该在服务器中格式化并发送到客户端。你正在尝试的方法是一个不好的做法。 –
这个JSON格式在服务器端（使用NodeJS）和我将发送给客户端的输出。 – lgabster