error-handling - 从观察者内部的 “error”函数调用 “next”

Question

让我们看一下这个伪代码:

obs$.subscribe( response => {

  if (response.statusFlag) {

    console.log('Everything is good');

  } else {

    // I need to switch into the error-part of my observer: pseudoCode
    // I need to go into Error-World
    moveIntoErrorPart();

  }

},
error => {
  console.log('Im in Error-World');
});

所以在

response.statusFlag =真// 'Everything is good'

response.statusFlag =假// 'Im in Error-World'

如何从INSIDE next移到 error？

Answer 1

您可以在pipe()中移动逻辑

obs$.pipe(
    mergeMap(res => res.statusFlag==true ? of(res) : throwError('error'))
)
.subscribe(...)