[英]Vue adding to existing session storage array
我已經構建了一個 API 發送一個包含所有評論的視頻,並且在前端,該視頻在裝載時被調用。 我有一個創建評論按鈕,它調用一個 createComment 路由,該路由向視頻添加評論並將其保存在數據庫中。 但是,新評論沒有出現,因為在調用第一次獲取所有視頻后,代碼然后使用 session 存儲來保存視頻,而不必在每次安裝時調用 API。 有什么辦法可以將新評論添加到 session 存儲。 所有評論都存儲在他們的視頻中,因此視頻是一個帶有評論數組屬性的 object。
感謝您對此的任何幫助。
主頁
<template>
<div class="home">
<SelectedVideo v-bind:user="user" v-bind:video="videos[0]"/>
</div>
</template>
<script>
import axios from 'axios';
import SelectedVideo from '../components/SelectedVideo.component';
axios.defaults.withCredentials = true;
export default {
name: 'Home',
components: {
SelectedVideo
},
data() {
return {
videos: [],
user: null
}
},
created() {
if (sessionStorage.homeVideos) {
console.log('Getting from session storage...');
this.videos = JSON.parse(sessionStorage.homeVideos);
} else {
console.log('Getting from API and setting res to session storage...');
axios.get('http://localhost:8000/api/v1/videos')
.then(res => {
sessionStorage.setItem('homeVideos', JSON.stringify(res.data.data.videos));
this.videos = JSON.parse(sessionStorage.homeVideos);
})
.catch(err => console.log("ERROR: " + err.response.data.message));
}
},
mounted(){
if (sessionStorage.user) {
// this.videoId = video._id
this.user = JSON.parse(sessionStorage.user);
}
}
}
</script>
<style lang="scss" scoped>
</style>
選定的視頻組件
<template>
<div class="selected">
<h2 class="selected__title">{{video.title}}</h2>
<video class="selected__video" :src=video.video controls :poster=video.thumb></video>
<div style="width: 70%;">
<div class="selected__details">
<h3 class="selected__details__views">300 views</h3>
<div class="selected__thumbs">
<div class="selected__like">👍 47</div>
<div class="selected__dislike">👎 3</div>
</div>
</div>
<form class="selected__commentbox">
<label for="comments" class="selected__commentbox__label">Comments</label>
<textarea v-model="text" class="selected__commentbox__textarea" rows="4" id="comments" placeholder="Type a sweet comment..."></textarea>
<button @click="handleSubmit" class="selected__commentBtn">add comment</button>
</form>
<div v-bind:key="comment._id" v-for="comment in video.comments" class="selected__comments">
<Comment v-bind:comment="comment"/>
</div>
</div>
</div>
</template>
<script>
import Comment from './Comment.component.vue';
import axios from 'axios';
export default {
name: 'SelectedVideo',
data() {
return {
text: null,
videoId: this.video._id,
userId: this.user._id
}
},
props: ["video", "user"],
components: {
Comment
},
methods: {
handleSubmit(event) {
event.preventDefault();
this.createComment(this.text, this.videoId, this.userId);
this.text = '';
},
async createComment(comment, video, user) {
try{
const res = await axios({
method: 'POST',
url: 'http://localhost:8000/api/v1/comments/',
data: {
comment,
video,
user
}
});
if (res.data.status === 'success') {
// location.reload(true);
console.log(res);
}
} catch(err) {
console.log(err.response.data.message);
}
}
}
}
</script>
為了實現您所描述的,我認為除了sessionStorage
邏輯之外的文件中需要進行一些更改以使其正常工作。 首先,您需要添加一個方法,以便SelectedVideo.vue可以更新其父級中的視頻評論,即Homepage
主頁
<SelectedVideo v-bind:user="user" v-bind:video="videos[0]" @updateComment=updateComment/>
methods: {
updateComment(comments) {
this.$set(this.videos, 0, {...this.videos[0],...comments}); //update Vue video list
sessionStorage.setItem("homeVideos", JSON.stringify(this.videos)); // update sessionStorage for future load
}
}
其次,獲取到新評論后,需要調用父類的updateComment
方法,以便更新視頻列表
選擇視頻.vue
async createComment(comment, video, user) {
try{
const res = await axios({
method: 'POST',
url: 'http://localhost:8000/api/v1/comments/',
data: {
comment,
video,
user
}
});
if (res.data.status === 'success') {
this.$emit("updateComment", res.data.data); // call parents update method
console.log(res);
}
} catch(err) {
console.log(err.response.data.message);
}
}
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