我有以下数据
[
{
"_id": "c9d5ab1a",
"subdomain": "wing",
"domain": "aircraft",
"part_id": "c9d5ab1a",
"info.mimetype": "application/json",
"info.dependent": "parent",
"nested": [
{
"domain": "aircraft",
"_id": "c1859902",
"info.mimetype": "image/jpeg",
"info.dependent": "c9d5ab1a",
"part_id": "c1859902",
"subdomain": "tail"
}
]
},
{
"_id": "1b0b0a26",
"subdomain": "fuel",
"domain": "aircraft",
"part_id": "1b0b0a26",
"info.mimetype": "image/jpeg",
"info.dependent": "no_parent"
}
]
如果"info.dependent": "parent"
嵌套,则"info.dependent": "no_parent"
没有子级。我试图创建一个动态表,但是我仍然坚持如何使其与嵌套表可折叠/可扩展。
这是我在stackblitz上的代码。
<mat-table class=" mat-elevation-z8" [dataSource]="dataSource">
<ng-container [matColumnDef]="col" *ngFor="let col of displayedColumns">
<mat-header-cell *matHeaderCellDef> {{ col }} </mat-header-cell>
<mat-cell *matCellDef="let element"> {{ element[col] }} </mat-cell>
</ng-container>
<mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
<mat-row *matRowDef="let row;columns:displayedColumns"></mat-row>
</mat-table>
.ts
public data = [
{
"_id": "c9d5ab1a",
"subdomain": "wing",
"domain": "aircraft",
"part_id": "c9d5ab1a",
"info.mimetype": "application/json",
"info.dependent": "parent",
"nested": [
{
"domain": "aircraft",
"_id": "c1859902",
"info.mimetype": "image/jpeg",
"info.dependent": "c9d5ab1a",
"part_id": "c1859902",
"subdomain": "tail"
}
]
},
{
"_id": "1b0b0a26",
"subdomain": "fuel",
"domain": "aircraft",
"part_id": "1b0b0a26",
"info.mimetype": "image/jpeg",
"info.dependent": "no_parent"
}
];
dataSource = new MatTableDataSource([]);
displayedColumns = ['_id', 'subdomain', 'domain', 'part_id', 'info.mimetype', 'info.dependent'];
constructor(){
this.displayedColumns = this.displayedColumns;
this.dataSource = new MatTableDataSource(this.data);
}
嵌套格式如下
第1行-> _id,子域,域,信息。
当我们单击该特定行时,它必须展开并在具有列名和行数据的表中显示嵌套数据。
"nested": [
{
"domain": "aircraft",
"_id": "c1859902",
"info.mimetype": "image/jpeg",
"info.dependent": "c9d5ab1a",
"part_id": "c1859902",
"subdomain": "tail"
}
]
答案 0 :(得分:4)
注意:对于那些想省略冗长解释的人,这里是StackBlitz example。
您真正想要的是创建一个嵌套的VStack {
Spacer()
Text("FirstLine\nSecondLine\nThirdLine")
.font(.headline)
.lineLimit(2)
Spacer()
}
,其中所有嵌套表都是可排序的,并且也可以通过其过滤。
首先,由于需要在嵌套表中使用过滤和排序,因此需要为其创建新的mat-table
。最初,您可以在MatTableDataSource
中创建主dataSource
,如下所示。
ngOnInit
从可扩展行example in the docs,我们可以看到如何创建可扩展行。在可展开的行中,我们现在将有一个表以及usersData: User[] = [];
USERS.forEach(user => {
if (user.addresses && Array.isArray(user.addresses) && user.addresses.length) {
this.usersData = [...this.usersData, { ...user, addresses: new MatTableDataSource(user.addresses) }];
} else {
this.usersData = [...this.usersData, user];
}
});
this.dataSource = new MatTableDataSource(this.usersData);
输入。我们将添加一些条件,以便仅当存在Filter
时行才可扩展。
addresses
现在,仅当存在嵌套元素时,行才会展开,我们需要为没有<div class="example-element-detail" *ngIf="element.addresses?.data.length"
[@detailExpand]="element == expandedElement ? 'expanded' : 'collapsed'">
<div class="inner-table mat-elevation-z8" *ngIf="expandedElement">
<mat-form-field>
<input matInput (keyup)="applyFilter($event.target.value)" placeholder="Filter">
</mat-form-field>
<table #innerTables mat-table #innerSort="matSort" [dataSource]="element.addresses" matSort>
<ng-container matColumnDef="{{innerColumn}}" *ngFor="let innerColumn of innerDisplayedColumns">
<th mat-header-cell *matHeaderCellDef mat-sort-header> {{innerColumn}} </th>
<td mat-cell *matCellDef="let element"> {{element[innerColumn]}} </td>
</ng-container>
<tr mat-header-row *matHeaderRowDef="innerDisplayedColumns"></tr>
<tr mat-row *matRowDef="let row; columns: innerDisplayedColumns;"></tr>
</table>
</div>
</div>
的用户摆脱悬停
这里是CSS,负责在悬停时添加addresses
background-color
因此,如果该行具有tr.example-element-row:not(.example-expanded-row):hover {
background: #777;
}
,则只需向该行添加example-element-row
类。如果没有地址,则该行不应是可单击的,并且不应有悬停指示用户该行实际上是不可单击的。
address
在<tr mat-row *matRowDef="let element; columns: columnsToDisplay;"
[class.example-element-row]="element.addresses?.data.length"
[class.example-expanded-row]="expandedElement === element"
(click)="toggleRow(element)">
</tr>
中,我们将定义单击模板中的一行时发生的逻辑。当用户单击此函数中的行时,我们还将实现toggleRow
。
sort
最后,我们需要定义@ViewChildren('innerSort') innerSort: QueryList<MatSort>;
toggleRow(element: User) {
element.addresses && (element.addresses as MatTableDataSource<Address>).data.length ? (this.expandedElement = this.expandedElement === element ? null : element) : null;
this.cd.detectChanges();
this.innerTables.forEach((table, index) => (table.dataSource as MatTableDataSource<Address>).sort = this.innerSort.toArray()[index]);
}
函数,以便可以过滤嵌套表。
applyFilter
这是StackBlitz上的一个有效示例。
答案 1 :(得分:0)
着眼于examples from the docs,尤其是the one with the expandable row:
multiTemplateDataRows
中的<mat-table>
指令@detailExpand
触发器Here是文档中包含您数据的示例
编辑(关于评论)
以下是获取动态列的方法:
将此添加到您的组件
getKeys(object): string[] {
return Object.keys(object);
}
使用模板中的方法(根据随附的详细信息屏幕和nested
键下有关多个元素的注释更新的模板):
<div class="example-element-descriptions">
<div *ngFor="let nested of element['nested']"
class="example-element-description">
<div *ngIf="element['info.dependent'] === 'parent'">
<div class="example-element-description__header">
<div class="example-element-description__cell"
*ngFor="let key of getKeys(nested)">{{key}}</div>
</div>
<div class="example-element-description__content">
<div class="example-element-description__cell"
*ngFor="let key of getKeys(nested)">{{element[key]}}
</div>
</div>
</div>
<div *ngIf="element['info.dependent'] === 'no_parent'">no parent</div>
</div>
</div>