javascript - 如何将 promise 中的错误返回到 redux saga catch block ？现在得到错误未定义

Question

我在我的传奇中调用一个 firebase 函数。该函数工作正常，如果返回错误，则会进入 saga 的 catch block 。但错误变量没有传递。代码如下:

const firebaseAuth = ({ email, password }) =>
  firebase.auth().signInWithEmailAndPassword(email, password)
    .catch((error) => { throw error; });


function* loginUser(action) {
  try {
    const user = yield call(firebaseAuth, action.payload);

    yield put({ type: USER_LOGIN_SUCCESS, payload: { user } });
  } catch (error) {
    /* eslint-disable no-debugger */
    debugger;

    // I need to see the error here.

    yield put({ type: USER_LOGIN_FAIL });
  }
}

function* sessionSaga() {
  yield takeEvery(USER_LOGGING_IN, loginUser);
}

export default sessionSaga;

目前，当程序在调试器语句处中断时，错误未定义。知道如何解决这个问题吗？

Answer 1

我认为你应该在 try-catch block 中添加调用 Promise 的函数:

function* loginUser(action) {
  try {
      const firebaseAuth = ({ email, password }) =>
      firebase.auth().signInWithEmailAndPassword(email, password)
        .catch((error) => { throw error; });

     const user = yield call(firebaseAuth, action.payload);

    yield put({ type: USER_LOGIN_SUCCESS, payload: { user } });
  } catch (error) {
    /* eslint-disable no-debugger */
    debugger;

    // I need to see the error here.

    yield put({ type: USER_LOGIN_FAIL });
  }
}