角度ng-select：GroupBy数组ng-select

如何解决角度ng-select：GroupBy数组ng-select

嗨，我的ng-select出现了问题，在这种情况下，storeTypes是一个数组，如果storeTypes将是一个字符串，那么功能已经很完善了，但是我需要这个变量是string []。我该怎么办？

@Component({
    selector: 'my-app',template: `
             
        <label>Grouping</label>
        <ng-select [items]="accounts"
                bindLabel="label"
                bindValue="code"
                groupBy="storeTypes[0]"
                [(ngModel)]="selectedAccount">
        </ng-select>
        `
})
export class AppComponent {

    selectedAccount = '9'
    accounts = [
        {code: "9",checked: false,label: "Adidas",storeTypes:["Store"]},{code: "91",label: "Nike",{code: "92",label: "5guys",storeTypes:["Restaurant"]},{code: "93",label: "McDonal",{code: "94",label: "FastFood",storeTypes:["Restaurant"]}
   ];
   
    constructor() {
    }
    
}

现在我看到了： enter image description here

我需要这个： enter image description here

解决方法

一个问题是 groupby 应该是 [groupby] 。 其次，您应该创建一个助手函数进行分组，因为groupby将采用属性名称或函数。

尝试以下方法：

@Component({
    selector: 'my-app',template: `
             
        <label>Grouping</label>
        <ng-select [items]="accounts"
                bindLabel="label"
                bindValue="code"
                [groupBy]="groupingHelper"
                [(ngModel)]="selectedAccount">
        </ng-select>
        `
})
export class AppComponent {

    groupingHelper(item){return item.storeTypes[0]}
    selectedAccount = '9'
    accounts = [
        {code: "9",checked: false,label: "Adidas",storeTypes:["Store"]},{code: "91",label: "Nike",{code: "92",label: "5guys",storeTypes:["Restaurant"]},{code: "93",label: "McDonal",{code: "94",label: "FastFood",storeTypes:["Restaurant"]}
   ];
   
    constructor() {
    }
    
}