[英]how to get data from JSON file in Vue.js?
我有具有这种结构的“modified_data.json”JSON 文件。
{
"data": [
[
{
"account_id": " "
"account_name": " "
},
{
"account_id": " "
"account_name": " "
},
{
"account_id": " "
"account_name": " "
},
{
"account_id": " "
"account_name": " "
}
],
[
{
"account_id": " "
"account_name": " "
},
{
"account_id": " "
"account_name": " "
},
{
"account_id": " "
"account_name": " "
}
],
[
{
"account_id": " "
"account_name": " "
},
{
"account_id": " "
"account_name": " "
},
{
"account_id": " "
"account_name": " "
}
]
]
}
我想从每个数组中获取第一个对象的 account_name ...
有没有人可以给我一个解决方案??
现在我使用Vue.js来显示它,我可以用python获取每个数据,但是Vue.js对我来说还不熟悉......请帮助我:)
好吧,你将不得不添加你为 Vue 编写的代码
如果你在一个 vue 应用程序中,你可以做这样的事情
<script>
import json from './json/data.json'
export default{
data(){
return{
myJson: json
}
}
}
</script>
如果你在一个 html 页面中写它。 您可以分两步完成。
第一个是将文件链接添加为脚本
<script src="../file.json"></script>
然后在 vue 脚本部分中,您可以将其分配给数据对象。
var ele = new Vue({
el : "#YourElement",
data : ObjName
});
“ObjName”是文件中 json 对象的名称。
ObjName :
{
"data": [
[
{
"account_id": " "
"account_name": " "
}
您可以使用计算属性,该属性会被动地获取每个数组的第一个对象的account_name
属性:
const data = { "data": [ [ { "account_id": "11", "account_name": "name11" }, { "account_id": "12", "account_name": "name12" }, { "account_id": "13", "account_name": "name13" }, { "account_id": "14", "account_name": "name14" } ], [ { "account_id": "21", "account_name": "name21" }, { "account_id": "22", "account_name": "name22" }, { "account_id": "23", "account_name": "name23" } ], [ { "account_id": "31", "account_name": "name31" }, { "account_id": "32", "account_name": "name32" }, { "account_id": "33", "account_name": "name33" } ] ] } new Vue({ el: '#demo', data() { return { data: data.data } }, computed: { firstAccountNames() { return this.data.map(dataSet => dataSet[0].account_name) } } })
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script> <div id="demo"> <ul> <li v-for="name in firstAccountNames"> {{ name }} </li> </ul> </div>
我解决了! 这是代码!
var app = new Vue({
el: '#app',
data: {
datas: []
},
computed: {
getAccountNames() {
return this.datas.map(dataSet => dataSet[0].account_name)
}
},
mounted() {
var self = this
$.getJSON("modified_data.json", function(json_data) {
self.datas = json_data.data
})
}
})
无论如何,另一个问题......“this”和“self”有什么区别? 我认为“self”等于“this”,但是当我只使用“this”时,它有错误,但“self”效果很好……谁能告诉我区别?
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