访问 mapDispatchToProps 方法内部的状态

问题描述

我使用 redux 编写了一个容器组件，我的 mapDispatchToProps 实现看起来像这样

I have written a container component using redux and my implementation for mapDispatchToProps looks like this

const mapDispatchToProps = (dispatch, ownProps) => {
    return {
        onChange: (newValue) => {
            dispatch(updateAttributeSelection('genre', newValue));
            dispatch(getTableData(newValue, ownProps.currentYear));
        }
    }
}

问题是为了 getTableData 我需要一些其他组件的状态.如何在此方法中访问状态对象?

The problem is that in order to getTableData I need the state of some other components. How can I get access to the state object in this method?

推荐答案

你可以使用 redux-thunk 创建一个单独的 action creator 函数，它可以访问 getState，而不是在 getState 中定义函数代码>mapDispatchToProps:

You can use redux-thunk to create a separate action creator function which has access to getState, rather than defining the function inside mapDispatchToProps:

function doTableActions(newValue, currentYear) {
    return (dispatch, getState) => {
        dispatch(updateAttributeSelection('genre', newValue));
        let state = getState();
        // do some logic based on state, and then:
        dispatch(getTableData(newValue, currentYear));
    }
}


let mapDispatchToProps = (dispatch, ownProps) => {
    return {
        onChange : (newValue) => {
            dispatch(doTableActions(newValue, ownProps.currentYear))
        }
    }
}

有一些不同的方法来组织这些，但类似的方法应该可行.

Some varying ways to go about organizing those, but something like that ought to work.

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