[英]Accessing nested json data with Hooks
我在使用 Hooks 过滤 React Typescript 中的 json 时遇到问题。 我有一个来自 fetch 的 JSON,它看起来像这样:
[
{
"dealer 1":
[
{
"name": "SERVICE 1"
"city": "NORTH CANTON"
"phone": "3306596372"
"isOpen": "true"
},
{
"name": "SERVICE 2"
"city": "OHIO"
"phone": "3306596372"
"isOpen": "true"
}
]
},
{
"dealer 2":
[
{
"name": "SERVICE A"
"city": "WASHINGTON"
"phone": "3306596375"
"isOpen": "true"
},
{
"name": "SERVICE B"
"city": "SEATTLE"
"phone": "3306596376"
"isOpen": "true"
}
]
}
]
我获取 api 的代码是:
useEffect(() => {
axios.get("API URL here")
.then(res => {
console.log(res)
setCTSN(res.data)
});
}, []);
我想退回所有开放的经销商,所以我需要通过“isOpen=true”过滤它
const isOpen = 'true'
const result = OPEN
.map(item => ({
...item, //Spread types may only be created from object types.ts(2698)
children: item.children
.filter(child => child.value.includes(isOpen.toLowerCase()))
}))
.filter(item => item.children.length > 0)
console.log(result)
但我收到“...项目”的错误,我不确定我在 React Typescript 中是否正确执行此操作。
有人能帮我吗?
你可以这样做
OPEN.filter(item => item[Object.keys(item)[0]].some(service => service.isOpen))
但是恕我直言,您对 json 数据有疑问,它看起来不像是一个好的建模。
这种结构会更好,因此过滤更容易:
{
name: "dealer 1",
services:
[
{
"name": "SERVICE 1"
"city": "NORTH CANTON"
"phone": "3306596372"
"isOpen": "true"
},
{
"name": "SERVICE 2"
"city": "OHIO"
"phone": "3306596372"
"isOpen": "true"
}
]
}
然后像这样过滤...
OPEN.filter(item => item.services.some(service => service.isOpen))
您应该使用此方法制作您的OPEN
数组,然后使用 map 显示它们的反应。
如果您在展示它们时遇到问题,请在评论中询问我的代码。
const Json = [ { "dealer 1": [ { "name": "SERVICE 1", "city": "NORTH CANTON", "phone": "3306596372", "isOpen": true }, { "name": "SERVICE 2", "city": "OHIO", "phone": "3306596372", "isOpen": false } ] }, { "dealer 2": [ { "name": "SERVICE A", "city": "WASHINGTON", "phone": "3306596375", "isOpen": true }, { "name": "SERVICE B", "city": "SEATTLE", "phone": "3306596376", "isOpen": true } ] } ] const OPEN = [] Json.forEach(item => { OPEN.push({ dealer:Object.keys(item)[0], service:item[Object.keys(item)[0]].filter(service =>service.isOpen) }) }) console.log(OPEN)
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