Vue Router根据后台数据加载不同的组件(思考->实现->不止于实现)

zhea55 2021-08-08 19:16:24
vue 数据 后台 router 台数


实际项目中遇到的需求

同一个链接需要加载不同的页面组件。根据用户所购买服务的不同,有不同的页面展现。

有一些不好的实现方式

  1. 直接把这几个组件写在同一个组件下,通过v-if去判断。如果这么做的话,甚至可以不使用vue-router,直接把所有组件,都写在一个文件里面,全部通过v-if判断,也是可行的。(前提是几万行代码一起,你不嫌麻烦的话)
  2. 在渲染这个链接的时候,直接去请求后台的数据,通过数据渲染不同的链接。(理论上是可行的,但如果用户没有用这个功能,这些链接每次都提前取了后台数据;另外如果用户知道了链接,直接访问链接,还是需要逻辑去判断用户该看到哪个页面)
  3. 通过调用router.beforeEach,对每个路由进行拦截,当路由为我们指定的路由时,请求后台数据,动态跳转页面。(功能是可以完成,但实际上,这只是整个系统的一小块功能,不应该侵入整个路由系统,如果每个业务页面,都写在全局路由系统,也会导致路由的逻辑过于复杂)

个人感觉比较好的实现方式

在配置路由的地方获取服务器数据动态加载对应的组件

{
path: 'shopKPI',
// 如果提前把后台数据存到store里面,在这里访问store数据,可以直接判断出来
// 但这种特定业务页面的数据放全局store,其他地方也不用,实在没有必要
component: () => import('@/views/store/dataVersion'),
name: 'store_KPI',
menuName: '店铺参谋',
meta: {
codes: ['storeProduct.detail']
}
}

理想很美好,现实的情况是,component接收的这个方法必须要同步的返回一个promise。

这时候我想到了上面不好的实现方式1,稍微加以改造

<!-- ChooseShopKPI.vue -->
<template>
<dataVersion v-if="!useNewShopKPI" />
<ShopKPI v-else />
</template>
<script>
import { get } from 'lodash';
import { getStoreReportFormVersion } from '@/api/store';
import dataVersion from './dataVersion';
import ShopKPI from './ShopKPI';
export default {
name: 'ChooseShopKPI',
components: {
dataVersion,
ShopKPI,
},
data() {
return { useNewShopKPI: false };
},
created() {
getStoreReportFormVersion().then((res) => {
if (get(res, 'data.data.new')) {
this.useNewShopKPI = true;
}
});
},
};
</script>
<style lang="css" scoped></style>

把路由渲染对应的页面,改为渲染这个中间页面ChooseShopKPI

{
path: 'shopKPI',
// 如果提前把后台数据取到,在这里访问store数据,可以直接判断出来
// 但这种特定业务页面的数据放全局store,其他地方也不用,实在没有必要
- component: () => import('@/views/store/dataVersion'),
+ component: () => import('@/views/store/ChooseShopKPI'),
name: 'store_KPI',
menuName: '店铺参谋',
meta: {
codes: ['storeProduct.detail']
}
}

这样就实现了我们期望的功能。

功能已实现,但我又开始了新的思考

这种方式虽然很好的解决了动态加载页面组件的问题。但也产生了一些小问题。

  1. 如果这种通过服务器加载数据的页面后续增加的话,会出现多个ChooseXXX的中间页面。
  2. 这种中间页面,实际上是做了二次路由,不熟悉逻辑的开发人员可能并不清楚这里面的页面跳转逻辑,增加了理解成本。

最终方案——高阶组件

通过对ChooseXXX进行抽象,改造为DynamicLoadComponent

<!-- DynamicLoadComponent.vue -->
<template>
<component :is="comp" />
</template>
<script>
export default {
name: 'DynamicLoadComponent',
props: {
renderComponent: {
type: Promise,
},
},
data() {
return {
comp: () => this.renderComponent
}
},
mounted() {},
};
</script>
<style lang="css" scoped></style>

直接在路由的配置中获取后台数据,并进行路由的分发。这样路由逻辑都集中在路由配置文件中,没有二次路由。维护起来不会头疼脑胀。

DynamicLoadComponent组件也得以复用,后续新增判断后台数据加载页面的路由配置,都可以导向这个中间组件。

{
path: 'shopKPI',
component: () => import('@/views/store/components/DynamicLoadComponent'),
name: 'store_KPI',
menuName: '店铺参谋',
meta: {
codes: ['storeProduct:detail'],
},
props: (route) => ({
renderComponent: new Promise((resolve, reject) => {
getStoreReportFormVersion()
.then((responseData) => {
const useNewShopKPI = get(responseData, 'data.data.shop_do');
const useOldShopKPI = get(
responseData,
'data.data.store_data_show'
);
if (useNewShopKPI) {
resolve(import('@/views/store/ShopKPI'));
} else if (useOldShopKPI) {
resolve(import('@/views/store/dataVersion'));
} else {
resolve(import('@/views/store/ShopKPI/NoKPIService'));
}
})
.catch(reject);
}),
})
}
版权声明
本文为[zhea55]所创,转载请带上原文链接,感谢
https://www.cnblogs.com/zhea55/p/15115555.html

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