1、从一个数组对象中获取最里层id
"grades":[
{
"grade_id":1,
"grade_name":"一年级",
"class":[ //item[key2]
{
"id":1,
"name":"一班"
},
{
"id":2,
"name":"二班"
},
{
"id":4,
"name":"三班"
}
]
},
{
"grade_id":2,
"grade_name":"二年级",
"class":[
{
"id":3,
"name":"一班"
}
]
},
{
"grade_id":3,
"grade_name":"三年级",
"class":[
{
"id":8,
"name":"一班"
},
{
"id":9,
"name":"二班"
}
]
}
]
this.gradesData.filter((item, index) => {
for (let key in item) {
if (key=="class") {
for (let key2 in item[key]) {
let id = item[key][key2]['id'];
this.selectedItem.push(id)
}
}
}
console.log(this.selectedItem)//124389