javascript - Redux_Saga。如何将函数作为参数传递给嵌套的生成器？

Question

所以，我想将一些函数 setupSocket 作为参数推送到嵌套的生成器 createSaga 中执行，但现在我不明白我该怎么做？

在父生成器 mySaga 中，setupSocket 正常显示，但在 createSaga 中没有...

import { takeEvery, put, call, take } from 'redux-saga/effects'; 
import { delay } from 'redux-saga';
import { addMessage, addUser } from '../actions'
import * as constants from '../constants'

function* createSaga(action, setupSocket) {
    try {
        console.log(setupSocket); // not good
        yield put(addMessage(action.message, action.author, action.photo));
        yield put(addUser(action.author, action.photo));
    } catch (e) { 
        console.log(e) 
    }
};

function* mySaga(setupSocket) {
    console.log(setupSocket); // all good
    yield takeEvery(constants.ADD_DATA, createSaga);
};

export default mySaga;

Answer 1

您可以将额外的参数传递给 takeEvery，这些参数将传递给 saga。

function* createSaga(setupSocket, action) {
    console.log(setupSocket); // should now be good
    ...
};

function* mySaga(setupSocket) {
    yield takeEvery(constants.ADD_DATA, createSaga, setupSocket);
};

如果你传递一些参数，action 将永远是最后一个，所以我不得不交换 action 和 setupSaga 顺序 createSaga 传奇参数。

https://redux-saga.js.org/docs/api/#takeeverypattern-saga-args