如何使用immutable.js之类的东西在Redux中组合多个combineReducers函数 [英] How can I combine multiple combineReducers functions in Redux using something like immutable.js

问题描述

我使用immutable.JS通过redux-immutablejs管理我的商店。我现在想使用redux-form库，但我遇到了一个组合reducer的问题。

I am using immutable.JS to manage my stores via redux-immutablejs. I would now like to use the redux-form library but I am having an issue combining reducers.

Redux-immutable提供了combineReducers函数，该函数将检查传递的所有reducers是否返回不可变对象。

Redux-immutable provides a combineReducers function that will check if all the reducers it is passed return immutable objects.

Redux本身提供了combineReducers函数，不执行此类检查。

Redux itself provides a combineReducers function that performs no such checking.

Redux-form要求你包含他们的reducers但是我不能使用Redux immutable的combineReducers，因为它会失败。

Redux-form requires that you include their reducers but I cannot do so using Redux immutable's combineReducers as it will fail.

所以我要做的是基本上将这两个函数的输出结合起来如下：

So what I'm trying to do is basically combine the outputs of these two functions like so:

import { combineReducers } from 'redux';
import { combineReducers as combineReducersUtils } from 'redux-utils';
import {reducer as formReducer} from 'redux-form';

const mainReducers = combineReducersUtils({
  devices, alarms
});

const extraReducers = combineReducers({
  form: formReducer
});

export default (mainReducers + extraReducers);

最后一行显然不起作用，但基本上说明了我的目标。

The last line obviously doesn't work but illustrates basically what I'm after.

感谢您花时间阅读此内容。

Thanks for taking the time to read this.

推荐答案

也许是这样的？

function rootReducer(state, action) {
  const newState = combineReducersUtils({devices, alarms})(state, action);
  return combineReducers({form: formReducer})(newState, action);
}

它应该有效，因为combineReducers的返回值只是一个减速器：

It should work because the return value of combineReducers is just a reducer:

（函数）：一个reducer，它调用reducers对象中的每个reducer，并构造一个具有相同形状的状态对象。

(Function): A reducer that invokes every reducer inside the reducers object, and constructs a state object with the same shape.

https://github.com/rackt/redux/blob/master/docs/api/combineReducers.md

更新为不在每个调度上创建新函数：

Updated to not create a new function on every dispatch:

const mainReducers = combineReducersUtils({devices, alarms});
const formReducers = combineReducers({form: formReducer});

function rootReducer(state, action) {
  return formReducers(mainReducers(state, action), action);
}

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