2种方式绑定ngModel的更改也反映在其分配的temp变量中（在页面加载时分配）

Question

我有2种方式的绑定模型，我在页面加载时将其分配给temp变量。但是temp变量也会改变NgModel。

this.questionService.getAll(this.id, this.bcID).subscribe(_result => {
      this.questions = _result.data.filter(x => x.isDeleted === false);
      this.tempQuestions = _result.data.filter(x => x.isDeleted === false);
    });

使用KEndo UI网格

<kendo-grid [data]="gridView"
              [height]="550"
              [skip]="gridState.skip"
              (edit)="editHandler($event)"">

this.gridView = process(this.questions, this.gridState);

Answer 1

基本上，变量this.questions和this.tempQuestions都指向相同的对象。为确保更改不会反映到this.tempQuestions，请对this.questions对象进行深层克隆。

这会有所帮助

this.questionService.getAll(this.id, this.bcID).subscribe(_result => {
  this.questions = _result.data.filter(x => x.isDeleted === false);
  this.tempQuestions = JSON.parse(JSON.stringify(this.questions));
});