Vue JS.分层调用未同步:网页->;VUEX->;API调用
我重构了我的VUE JS代码,使其具有专用的API层(调用AWS GraphQL服务),它由VUEX层调用。它现在有以下级别:
Web Page -> Vuex -> API
我想在引用数据(第7点)之前检索数据(this.getActitivity)。为简单起见,我删减了代码:
async created() {
console.log("Point 1")
await this.getActivities();
},
mounted() {
console.log("Point 7")
// reference the data set by this.getActivities()
},
methods: {
async getActivities() {
// from DB
console.log("Point 2")
this.$store.dispatch('getAllActivities') // vuex call
},
VUEX DATA STORE
actions: {
async getAllActivities ({ commit }) {
console.log("point 3")
const activities = await queries.getActivities()
console.log("point 6")
commit('setActivities', activities)
},
API
async getActivities () {
await API.graphql({
query: listActivities
}).then((response) => {
console.log("Point 4")
})
console.log("Point 5")
return activitiesList
},
打印以下内容:
第1点
第2点
第三点
第7点
第8点
第4点
第5点
第6点
我想我误用了等待/同步进程?
谢谢
解决方案
假设您需要多个组件/工艺路线中的活动列表(否则为什么要将此列表存储在Vuex中,而不是组件本身?!)您通常会这样做:
<template>
<div>
<ActivityItem v-for="act in ACTIVITY_LIST" :key="act.id" :activity="act" />
</div>
</template>
<script>
import ActivityItem from './components/ActivityItem';
import { mapGetters, mapActions } from 'vuex';
import { ACTIVITY_LIST, FETCH_ACTIVITIES } from './store/constants';
export default
{
components:
{
ActivityItem,
},
computed:
{
...mapGetters([ACTIVITY_LIST]),
},
created()
{
this[FECH_ACTIVITIES]();
},
methods:
{
...mapActions([FETCH_ACTIVITIES])
}
}
</script>
// store/constants.js
export const ACTIVITY_LIST = 'ACTIVITY_LIST';
export const FETCH_ACTIVITIES = 'FETCH_ACTIVITIES';
export const SET_ACTIVITIES = 'SET_ACTIVITIES';
// store/index.js
import Vue from 'vue';
import Vuex from 'vuex';
import { ACTIVITY_LIST, FETCH_ACTIVITIES, SET_ACTIVITIES } from './store/constants';
import myAPI from './api';
Vue.use(Vuex);
export default new Vuex.Store(
{
strict: process.env.NODE_ENV !== 'production',
state()
{
return {
activities: []
};
},
getters:
{
[ACTIVITY_LIST](state)
{
return state.activities;
}
},
mutations:
{
[SET_ACTIVITIES](state, value)
{
state.activities = value || [];
}
},
actions:
{
[FETCH_ACTIVITIES]({ commit })
{
return myAPI.getActivities().then(response =>
{
commit(SET_ACTIVITIES, response.data.activitiesList);
return response.data.activitiesList; // optional
});
}
}
});
相关文章