react-native - 当我运行我的传奇时，出现此错误 "Error: call: argument [object Object] is not a function"

Question

当 mi saga 被我的 action creator 触发时我有错误

"Error: call: argument [object Object] is not a function
    at check (blob:file:///95bb5b45-c4c5-44db-9d56-d4dcee551ace:126468:13)
    at getFnCallDesc (blob:file:///95bb5b45-c4c5-44db-9d56-d4dcee551ace:127645:22)
    at call (blob:file:///95bb5b45-c4c5-44db-9d56-d4dcee551ace:127658:25)
    at loginRequestSaga$ (blob:file:///95bb5b45-c4c5-44db-9d56-d4dcee551ace:128869:38)
    at tryCatch (blob:file:///95bb5b45-c4c5-44db-9d56-d4dcee551ace:21519:19)
    at Generator.invoke [as _invoke] (blob:file:///95bb5b45-c4c5-44db-9d56-d4dcee551ace:21694:24)
    at Generator.prototype.(anonymous function) [as next] (blob:file:///95bb5b45-c4c5-44db-9d56-d4dcee551ace:21562:23)
    at next (blob:file:///95bb5b45-c4c5-44db-9d56-d4dcee551ace:127025:29)
    at proc (blob:file:///95bb5b45-c4c5-44db-9d56-d4dcee551ace:127000:5)
    at runForkEffect (blob:file:///95bb5b45-c4c5-44db-9d56-d4dcee551ace:127241:21)"

我正在运行 react native 0.57 和最新版本的 redux saga

这是我的故事

import { put, call, select } from 'redux-saga/effects';
import { userServices } from '../../services';
import { userActions } from '../actions';
import { userConstants } from '../../constants/user.constants';

function* loginRequestSaga(action) {
  try {
    const data = yield call(userServices.fetchUser(action.credentials));
    yield put(userActions.loginSucess(data));
  } catch (e) {
    console.log(e);
  }
}

export const userSaga = {
  loginRequestSaga,
};

预先感谢您的帮助

Answer 1

我已尝试回答您的确切问题，但如果不查看您的其余代码就很难知道，所以请原谅猜测。

call(fn, args) 需要一个函数，然后是一些参数，所以你可能想要:

function* loginRequestSaga(action) {
  try {
    //next line has changed
    const data = yield call(userServices.fetchUser, action.credentials); 
    yield put(userActions.loginSucess(data));
  } catch (e) {
    console.log(e);
  }
}