如何针对对象属性过滤可观察的

发布于 2025-01-30 09:34:23 字数 688 浏览 3 评论 0原文

我有一个可观察的，字段$：可观察的＆lt; field []＆gt;。我需要查看每个字段的和result属性的属性，以确定是否填充了所有必需字段。

我还有另一个可观察的，丢失requiredresults $：可观察的lt; boolean＆gt;，我用来通过＆lt; button>＆lt; button type =“ button type =“ button” [disabled] =“（丢失requiredResults）来启用/禁用按钮 |

private validateRequiredResults() {
  this.missingRequiredResults$ = this.fields$.pipe(
    map(fields => 
      fields.filter(field => {
          field.required == true && (field.result == null || field.result == '')
        }).length != 0
    )
  );
}

。 false。

我在做什么错？

原文

I have an observable, fields$: Observable<Field[]>. I need to look at the required and result properties of each field to determine if all required fields have been populated.

I have another observable, missingRequiredResults$: Observable<boolean>, that I'm using to enable/disable a button via <button type="button" [disabled]="(missingRequiredResults$ | async)">

Here is the method I'm using to set missingRequiredResults$:

private validateRequiredResults() {
  this.missingRequiredResults$ = this.fields$.pipe(
    map(fields => 
      fields.filter(field => {
          field.required == true && (field.result == null || field.result == '')
        }).length != 0
    )
  );
}

No matter what I do, missingRequiredResults$ holds a value of false.

What am I doing wrong?

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ㄖ落Θ余辉 2025-02-06 09:34:23

当您指出时，您的代码缺少卷曲括号中的返回语句

private validateRequiredResults() {
  this.missingRequiredResults$ = this.fields$.pipe(
    map(fields => 
      fields.filter(field => {
          return field.required == true && (field.result == null || field.result == '') //add the return statement here
        }).length != 0
    )
  );
}

，您删除了卷曲括号并起作用。

You're code is missing the return statement in the curly brackets

private validateRequiredResults() {
  this.missingRequiredResults$ = this.fields$.pipe(
    map(fields => 
      fields.filter(field => {
          return field.required == true && (field.result == null || field.result == '') //add the return statement here
        }).length != 0
    )
  );
}

As you pointed out, you removed the curly brackets and it worked.

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