我想重新使用一个如下所示的组件选择器:
@Component({
selector: 'expression-builder',
template: `
<div class="container">
<expression *ngFor="#expression of expressions" [prototypes]="prototypes" [expression]="expression" [expressions]="expressions"></expression>
<a class="btn btn-primary" (click)="addExpression()"><i class="glyphicon glyphicon-plus"></i></a>
</div>
`,
})
但如果我在其他组件中设置它,它将不会显示任何内容:
@Component({
selector: 'expression',
template: `
<div class="row">
<!-- First Select -->
<div class="col-xs-3">
<select class="form-control" [(ngModel)]="selectedPrototypeSelector" (ngModelChange)="onPrototypeChange()">
<option *ngFor="#p of prototypes" [value]="p.selector">
{{ p.selectorName }}
</option>
</select>
</div>
<!-- Second Select -->
<div [ngClass]="{'col-xs-3': prototype?.valueType !== 'Set', 'col-xs-2': prototype?.valueType === 'Set'}" *ngIf="prototype">
<select class="form-control" [(ngModel)]="expression.constraint">
<option *ngFor="#constraint of prototype.constraints" [value]="constraint">
{{ constraint }}
</option>
</select>
</div>
<!-- Third Select -->
<div [ngClass]="{'col-xs-3': prototype?.valueType !== 'Set', 'col-xs-2': prototype?.valueType === 'Set'}">
<div>{{expression | json}}</div>
</div>
<div class="col-xs-1">
<a class="btn btn-danger pull-right" (click)="deleteExpression()"><i class="glyphicon glyphicon-remove"></i></a>
</div>
<!-- Expression Set selector -->
<div *ngIf="prototype?.valueType === 'Set'">
<expression-builder></expression-builder>
</div>
</div>
`,
directives: [ExpressionBuilderComponent]
})
如果我在这里设置它我会得到以下错误:
Unexpected directive value 'undefined'
我希望在我的案例valueType = Set
答案 0 :(得分:0)
在你设置的<div class="product">
<p>Name1<p>
</div>
<div class="product">
<p>Name2<p>
</div>
<div class="product">
<p>Name3<p>
</div>
<div class="product">
<p>Name4<p>
</div>
<div class="settings">
<p>SETTINGS<p>
</div>
中:
component
您必须将<!-- Expression Set selector -->
<div *ngIf="prototype?.valueType === 'Set'">
<expression-builder></expression-builder>
</div>
的班级名称添加到expression-builder
的{{1}}属性中,让angular2知道您在模板中使用的指令/组件类型。
例如,如果directives
的类名是@Component()
且父组件的类名是expression-builder
,那么您将得到以下内容:
<强> expression.set.component.ts 强>
ExpressionBuilderComponent