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redux-covenant

v1.0.7

Published

Covenant 可以让你轻松构建请求数据的UI组件。支持服务端渲染及首屏数据请求。

Downloads

35

Readme

Covenant

Covenant 可以让你轻松构建请求数据的UI组件。支持服务端渲染及首屏数据请求。

我正在构建context做为Store的Covenant,以及hooks版Covenant

Language: English

例子

Base

LoadMore

安装

npm install redux-covenant --save

起步

添加Covenant到Reducers /src/reducers/index.js

import {combineReducers} from 'redux';
import {covenant} from 'redux-covenant';

export default combineReducers({
  covenant,
  ...
});

编写Query方法 /src/api/banner.js

import axios from 'axios';

export async function banner({ city_no = '020', platform = '1' }) {
  const url = `http://httpbin.org/get`;
  const res = await axios.get(url, { params: { city_no, platform } });
  // 这里可以做一些错误处理,只需要将错误抛出 throw new Error("")
  return { list: res.data.data };
}

组件开发

import React, {Component} from 'react';
import {banner} from '/src/api/home';
import {query} from 'redux-covenant';

// 使用高阶函数获取数据给UI组件
@query(banner, {name: 'banner'})
class Banner extends Component {
  render() {
    let {banner, loading} = this.props;
    if (!banner || banner.loading) return "loading...";
    const {list, error} = banner;
    return (
      <div>
        {error}
        {list.map((item, key) => (
              <img key={key} src={item.img_url} title={item.alt} />
        ))}
      </div>
    );
  }
}
export default Banner;

Covenant Api

import {query} from 'redux-covenant';

query(Promise,config)

Promise

一个异步流

Query Config

{
  // `name` 请求成功后将会成为props的一个key
  name:'doctorList',
  
  // `variables`为异步流提供参数
  variables:props => ({
    shop_id: props.shopId,
    page_size: 4,
  }),
}

在返回的this.prop包含几个api fetchMore(config),获取更多 json confing { //variables为异步流提供参数 variables: {page_no: doctorList.page + 1}, //updateQuery`为异步流返回的结果,参数为之前的结果和新返回的数据 updateQuery: (previousResult, fetchMoreResult) => { return fetchMoreResult; }, }

`

refetch,重新获取,相当强制重新拉取初始化的数据