react-redux的非常基本的简单GET示例
我有一个“MockAPI”模拟对API的GET请求,如下所示:
const dashboards = [
{
"Id":1,
"title":"Overview"
},
{
"Id":2,
"title":"Overview"
},
{
"Id":3,
"title":"Overview"
},
{
"Id":4,
"title":"Overview"
}
];
class DashboardApi {
static getAllDashboards() {
return new Promise((resolve) => {
setTimeout(() => {
resolve(Object.assign([], dashboards));
}, delay);
});
}
}
我正在尝试开发一个react-redux流程,通过按钮点击调度一个动作,然后通过redux商店更新组件。
这是我的组件代码:
import React, { PropTypes } from 'react';
import { connect } from 'react-redux';
import * as dashboardActions from '../../actions/dashboardActions';
class HomePage extends React.Component {
constructor(props) {
super(props);
this.loadDashboards = this.loadDashboards.bind(this);
}
loadDashboards() {
this.props.dispatch(dashboardActions.loadDashboards());
}
dashboardItem(dashboard, index) {
return <p key={index}>{dashboard.title}</p>;
}
render() {
return (
<div>
<h1>
Hello World!
<button onClick={this.loadDashboards}>load</button>
</h1>
{this.props.dashboards.map(this.dashboardItem)}
</div>
);
}
}
HomePage.propTypes = {
dashboards: PropTypes.array.isRequired,
dispatch: PropTypes.func.isRequired
};
function mapStateToProps(state) {
return {
dashboards: state.dashboards
};
}
export default connect(mapStateToProps)(HomePage);
这是我的dashboardActions.js
:
import * as types from './actionTypes';
import dashboardApi from '../mockApi/mockDashboardApi';
export function loadDashboardsSuccess(dashboards) {
return { type: types.LOAD_DASHBOARDS_SUCCESS, dashboards };
}
export function loadDashboards() {
return dispatch => {
return dashboardApi
.getAllDashboards()
.then(dashboards => {
dispatch(loadDashboardsSuccess(dashboards));
});
};
}
这是我的减速机:
import initialState from './initialState';
import * as types from '../actions/actionTypes';
export default function dashboardReducer(state = initialState.dashboards, action) {
switch(action.types) {
case types.LOAD_DASHBOARDS_SUCCESS:
return action.dashboards;
default:
return state;
}
}
我正在尝试将onClick加载到仪表板数组中,并将<p>
标记呈现为仅显示title
值。不幸的是,它没有发生。
我看到LOAD_DASHBOARDS_SUCCESS操作正在加载,但是我发现商店中的dashboards
属性仍然是一个空数组,而不是显示返回的数据......
我在这里缺少什么?
答案 0 :(得分:4)
你的减速机上有一个拼写错误。 switch(action.types)
应为switch(action.type)
而不是&#39;