Question

我的react组件有两个状态

    class ProductsideBar extends Component {

    constructor(props){
        super(props)     

         this.state = {
            Catgeory: [
                {id:'1' , name:'parent_1' , parentId:'0'},
                {id:'2' , name:'child_1' , parentId:'1'},
                {id:'3' , name:'child_2' , parentId:'1'},

                {id:'4' , name:'parent_2' , parentId:'0'},
                {id:'5' , name:'child_1' , parentId:'4'},
                {id:'6' , name:'child_2' , parentId:'4'},
            ],
              subCatgeory:[]
              nestedCategory:[];
        }

....

我想要一个更改状态的JavaScript函数。将其分类为下面这样的嵌套数组，然后添加到state.nestedCategory ..

nestedCategory: [
    {
        id:'1' ,
        name:'parent_1' ,
        parentId:'0',
        subCategory: [{
            id:'2' ,
            name:'child_1',
            parentId:'1'
        }, {
            id:'3' ,
            name:'child_2' ,
            parentId:'1'
        }]
    }, {
        id:'4' ,
        name:'parent_2' ,
        parentId:'0',
        subCategory: [{
            id:'5' ,
            name:'child_1',
            parentId:'4'
        }, {
            id:'6' ,
            name:'child_2' ,
            parentId:'4'
        }]
    },
]

然后我可以使用nestedCategory做任何事情。

Answer 1

您可以执行以下操作。我没有包括找到子类别的逻辑，这很容易，但是这一行代码应该会有所帮助。

编辑：添加了适当的解决方案。

this.setState(
    {
        nestedCategory : this.state.category.map((value, index) => {
            const nobj = {...value};
            nobj.subCategory = this.state.subcategory.filter((value2) =>  value2.parentId === value.id); 
            return nobj;
         })
    }
)

我在react中有数组的平坦状态，我想使其成为嵌套数组并将其推到另一个对象ins状态

1 个答案: