ag-Grid在导航到另一个组件然后返回到网格组件时出现销毁警告。

huangapple go评论58阅读模式
英文:

ag-grid destroyed warning when routing to another component and then coming back to the grid component

问题

如何消除这个警告?

上面是我在Google Dev工具控制台中收到的警告:

ag grid: 网格API函数setRowData()不能在网格已被销毁时调用。
请不要在已销毁的网格上调用网格API函数 - 实际上,在网格销毁时不应保留API引用,否则您的应用程序将出现内存泄漏!在销毁网格时删除API引用。

以下是.ts代码:

gridApi: any;

@Input()
data: any;
@Input()
gridOptions: any;
@Input()
columnDefs: any;

onGridReady(params: any) {
  this.gridApi = params.api;
  this.data.subscribe((data: any) => {
    params.api.setRowData(data);
  });
}

当我路由到另一个组件然后返回到这个组件时,会发生此错误。
版本信息:
ag-agrid: v29
angular: v15

英文:

How can I get rid-off this warning?

Above is the warning I'm getting in google dev tool console:

ag grid: grid api function setRowData() cannot be called as the grid has been destroyed.
Pleased don't call grid API functions on destroyed grids - as a matter of fact you shouldn't be keeping the API reference, your application has a memory leak! Remove the API reference when the grid is destroyed.

Below is the .ts code:

gridApi: any;

@Input()
data: any;
@Input()
gridOptions: any;
@Input()
columnDefs: any;

onGridReady(params: any) {
  this.gridApi = params.api;
  this.data.subscribe((data: any) => {
    params.api.setRowData(data);
    });
}

This error happens when I route to another component and then come back to this component.
versions:
ag-agrid: v29
angular: v15

答案1

得分: 0

无法提供完全相同的格式,以下是翻译好的内容:

"没有一个可工作的示例很难说。

this.data 是一个 Observable 吗?如果你收到了内存泄漏的警告,请尝试以下操作:

onGridReady(params: any) {
  this.gridApi = params.api;
  this.data
    .pipe(take(1))
    .subscribe((data: any) => {
      params.api.setRowData(data);
    });
}

在不使用 .pipe(take(<number>)) 的情况下订阅 Observables 是内存泄漏的经典原因。
请阅读:

https://www.learnrxjs.io/learn-rxjs/operators/filtering/take#why-use-take

https://medium.com/@sub.metu/angular-how-to-avoid-memory-leaks-from-subscriptions-8fa925003aa9"

英文:

It's hard to tell without a working example.

Is this.data an Observable? If you are being warned of a memory leak then please try this:

onGridReady(params: any) {
  this.gridApi = params.api;
  this.data
    .pipe(take(1))
    .subscribe((data: any) =&gt; {
      params.api.setRowData(data);
    });
}

Subscribing to observables without using .pipe(take(&lt;number&gt;)) is a classic source of memory leaks.
Have a read of

https://www.learnrxjs.io/learn-rxjs/operators/filtering/take#why-use-take

or

https://medium.com/@sub.metu/angular-how-to-avoid-memory-leaks-from-subscriptions-8fa925003aa9

答案2

得分: 0

以下回答与此问题无关。问题是在订阅仍在运行时导航到页面会导致即使从组件导航离开,进程仍然继续。这在代码中很容易重现。

onGridReady(params: any) {
  this.gridApi = params.api;
  this.data
    .pipe(take(1))
    .subscribe((data: any) => {
      if (params.api.destroyCalled) { // 在从服务获取数据时需要在此处检查是否已调用destroy。
        return;
      }
      params.api.setRowData(data);
    });
}

如果在服务返回数据之前已调用destroy,则它仍将继续setRowData,这将引发错误。

英文:

The above answer has nothing to do with this issue. The problem is navigating to a page while the subscription is still running will cause the process to still continue even when navigating away from the component. This is easily reproducible in code

onGridReady(params: any) {
  this.gridApi = params.api;
  this.data
    .pipe(take(1))
    .subscribe((data: any) =&gt; {
     if(params.api.destroyCalled){  &lt;--- Had to check here if destroyed was called while the data is being fetched from the service.
          return;
        }
      params.api.setRowData(data);
    });
}

If the destroyed was called before the service returned, then it will still continue to setRowData which will throw the error.

答案3

得分: 0

The above answer has nothing to do with this issue. The problem is navigating to a page ... - this comment is correct.
you need to check !gridApi.destroyCalled

in angular/ts destroyCalled it will not compile as property is private and no accessor provided but it can be bypassed as !this.gridApi['destroyCalled']

英文:

The above answer has nothing to do with this issue. The problem is navigating to a page ... - this comment is correct.
you need to check !gridApi.destroyCalled

in angular/ts destroyCalled it will not compile as property is private and no accessor provided but it can be bypassed as !this.gridApi['destroyCalled']

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  • 本文由 发表于 2023年3月7日 07:15:17
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