javascript 错误：未捕获（承诺）：[object Object]
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Error: Uncaught (in promise): [object Object]
提问by Aditya
@Injectable()
class MyErrorHandler implements ErrorHandler {
handleError(error) {
// exception occured in some service class method.
console.log('Error in MyErrorhandler - %s', error);
if(error == 'Something went wrong'){
//do this.
}else{
//do this thing.
}
}
}
When in some class' method throws an exception then, the MyErrorHandler class prints the error caught as Error in MyErrorhandler - Error: Uncaught (in promise): [object Object]
Error: Something went wrong.
当在某个类中的方法抛出异常时，MyErrorHandler 类会将捕获的错误打印为 Error in MyErrorhandler - Error: Uncaught (in promise): [object Object]
Error: Something went wrong.
Question1: Why does the error displays as Error: Uncaught (in promise): [object Object]?
问题1：为什么错误显示为Error: Uncaught (in promise): [object Object]？
Question2: Due to the above message it will always read the else part even in the case of if(error == 'Something went wrong')of the code in any condition.How can I resolve this?
问题 2：由于上述消息，即使if(error == 'Something went wrong')在任何条件下的代码的情况下，它也将始终读取 else 部分。我该如何解决这个问题？
回答by Kishori
Try adding
尝试添加
if(error.message == 'Something went wrong'){
}
instead of only error. As error is an object.
而不仅仅是错误。因为错误是一个对象。
回答by Ruben Palavecino
actualmente estoy trabajando de esta manera.
实际情况 estoy trabajando de esta manera。
`import { Injectable, ErrorHandler, Injector } from '@angular/core'; import { AlertService } from './_alert.service';
`import { Injectable, ErrorHandler, Injector } from '@angular/core'; 从 './_alert.service' 导入 { AlertService };
@Injectable({ providedIn: 'root' }) export class ErroresService implements ErrorHandler {
@Injectable({ providedIn: 'root' }) 导出类 ErroresService 实现 ErrorHandler {
constructor(private sv_alert:AlertService) { }
构造函数（私有 sv_alert:AlertService）{}
handleError(err:any) {
const message = err.message ? err.message: err.message.toString();
this.sv_alert.AlertaMensajeError(${ message });
}
} `
handleError(err:any) { const message = err.message ? err.message: err.message.toString(); this.sv_alert.AlertaMensajeError( ${ message }); } }`
回答by Daniel Lopez
is necesary your check the response in yours promise...
有必要检查你的承诺中的回应......
you have to capture resolveand reject...
你必须捕捉决心并拒绝......
generally this happens because the value of rejectnot is capture
通常发生这种情况是因为拒绝的值不是被捕获
for example
例如
CREATE PROMISE...
创造承诺...
promise= () => {
return new Promise((resolve, reject) => {
if (condition) {
resolve(true);
}else{
reject(false);
}
});
}
And here capture ALL posible response in promise..
在这里捕获承诺中的所有可能的响应..
this.services.promise().then(
(data) => {
here capture your resolve
},
(err) => {
here capture your resolve
}
);
