我有这个:
<select class="readonly" [disabled]="contractDetails.signedFlag" [(ngModel)]="contractDetails.contract.acontactId">
<option value="{{contact.id}}" *ngFor="let contact of contractDetails.contactInfo" [selected]="contractDetails?.contract?.acontactId == contact.id">{{contact.fullName}}</option>
</select>
我有这个:
this.contractDetails.contract = new Contract();
问题是我得到的错误无法读取未定义的acontactId。有什么建议吗?
我无法使用[(ngModel)]="contractDetails?.contract?.acontactId"
因为那时我收到错误parser Error: The '?.' operator cannot be used in the assignment at column
答案 0 :(得分:0)
您可以尝试在contractDetails的Model.ts中设置contract = new Contract();
......类似于:
export class ContactDetail {
// ALL YOUR FIELDS
public contract :Contract = new Contract();
}
然后在Contract.ts中初始化字段,如:
export class Contract {
public aIdContact: string ="";
//other fields
}
希望它对你有所帮助......
p.s elvis operator
(entity?.property)不适合[(ngModel)]