javascript - redux-saga 第一次不起作用

Question

我有一个 redux-saga 如下：

export function* loadApplianceSaga() {
  try {
    let {request, success, error} = yield take(ActionTypes.APPLIANCE.LOAD);
    request.url = yield select(getResourceLink, request.resource);
    const response = yield call(makeRequest, request);
    if (!response.error) {
      yield put({type: success, payload: response.body});
    } else {
      yield put({type: error, payload: response});
    }
  } catch (e) {
    yield put({type: ActionTypes.REQUEST.CALL_ERROR, error: e});
  }
}

export function* watchLoadAppliance() {
  while (true) {
    yield* takeEvery(ActionTypes.APPLIANCE.LOAD, loadApplianceSaga);
  }
}

和根传奇：

export default function* rootSaga() {
  yield [
    fork(watchLoadAppliance)
  ]
}

我面临一个loadApplianceSaga第一次不起作用的问题。我登录并看到它第一次只发送ActionTypes.APPLIANCE.LOAD动作然后没有发送任何动作。但是在第二次，我可以看到发送的成功动作或失败动作。

谁能告诉我出了什么问题？提前致谢！

更新操作：

export const loadAppliances = () => {
  return {
    type: ActionTypes.APPLIANCE.LOAD,
    request: {
      resource: Resources.Appliances,
      param: {
        page: 0,
        size: 5,
        sort: 'name,desc'
      },
      header: {
        Accept: 'application/json'
      }
    },
    success: ActionTypes.APPLIANCE.LOAD_SUCCESS,
    error: ActionTypes.APPLIANCE.LOAD_ERROR
  }
};

Answer 1

你已经用过take两次了。尝试

export function* loadApplianceSaga(action) {
  try {
    let {request, success, error} = action;
    request.url = yield select(getResourceLink, request.resource);
    const response = yield call(makeRequest, request);
    if (!response.error) {
      yield put({type: success, payload: response.body});
    } else {
      yield put({type: error, payload: response});
    }
  } catch (e) {
    yield put({type: ActionTypes.REQUEST.CALL_ERROR, error: e});
  }
}

export function* watchLoadAppliance() {
  while (true) {
    yield* takeEvery(ActionTypes.APPLIANCE.LOAD, loadApplianceSaga);
  }
}