javascript - curry 函数导致错误但如果不 curry 则有效

Question

export const postMoviePopular = url = dispatch => {
    const data = axios.get(url);
    dispatch(saveMoviePopular(data));
}

const saveMoviePopular = payload => {
    return {
        type: POST_MOVIE_POPULAR,
        payload
    }
}

这是我的代码，它不起作用，因为它是柯里化(Currying)的，但如果它不是像下面这样柯里化(Currying)的，它就可以工作，这是为什么？？

export const postMoviePopular = url => {
    return dispatch => {
        const data = axios.get(url);
        dispatch(saveMoviePopular(data));
    }    
} 

我想知道这是否与我调用 mapDispatchToProps 的方式有关？？？

componentDidMount() {
        this.props.postMDBConfig(`https://api.themoviedb.org/3/configuration?api_key=${this.props.apiKey}`);
        this.props.postMoviePopular(`https://api.themoviedb.org/3/movie/popular?api_key=${this.props.apiKey}&language=en-US&page=1&region=US`)
    }

const mapDispatchToProps = (dispatch) => {
    return {
        postMDBConfig: url => dispatch(postMDBConfig(url)),
        postMoviePopular: url => dispatch(postMoviePopular(url))
    }
}

Answer 1

您需要一个返回语句。还有一个箭头。

export const postMoviePopular = url => dispatch => {
    const data = axios.get(url);
    return dispatch(saveMoviePopular(data));
}