[英]How to pass props in a Vue.js Express MongoDB app
我正在尝试使用Vue.js Node,Express和MongoDB构建基本的聊天应用程序。 我的聊天应用程序有一个欢迎页面,使用户可以在欢迎屏幕中输入他/她的名字。 (请参阅: Welcome.vue
)。 然后将用户名重新路由到Posts.vue
,并将用户名作为prop
传递到该组件。 在Posts.vue
,用户可以创建一条消息,然后将其添加到聊天消息日志中,并按名称和消息进行排列。 到目前为止,我已经成功地启用了名称( this.name
)和消息( this.description
)通过app.js
Express发布到mongoDB。 但是,只有消息( post.description
)返回到屏幕。 给定消息的用户名( post.name
)根本不会返回到屏幕。 这与将Welcome.vue
名称作为Posts.vue
的道具传递Posts.vue
吗? 有关如何解决此问题的任何建议? 我的代码如下。 谢谢!
Welcome.vue
<template>
<div class="welcome container">
<div class="card">
<div class="card-content center-align">
<h2 class="teal-text">Welcome</h2>
<form @submit.prevent="enterChat">
<label for="name">Enter your name:</label>
<input type="text" name="name" v-model="name">
<p v-if="feedback" class="red-text">{{ feedback }}</p>
<button class="btn teal">Enter Chat</button>
</form>
</div>
</div>
</div>
</template>
<script>
export default {
name: 'Welcome',
data () {
return {
name: null,
feedback: null
}
},
methods: {
enterChat(){
if(this.name){
this.$router.push({ name: 'Posts', params: { name: this.name } })
} else {
this.feedback = 'You must enter a name to join'
}
}
}
}
</script>
Posts.vue
<template>
<div class="posts">
<h2>{{ name }}'s Chat Feed</h2>
<div class="table-wrap">
<div class="form">
<div>
<textarea rows="15" cols="15" placeholder="DESCRIPTION" v-model="description"></textarea>
</div>
<div>
<button class="app_post_btn" @click="addPost">Add</button>
</div>
</div>
<table>
<tr>
<td>name</td>
<td width="550">Message</td>
<td width="100" align="center">Action</td>
</tr>
<tr v-for="post in posts" :key="post._id">
<td>{{ post.name }}</td>
<td>{{ post.description }}</td>
<td align="center">
<a href="#" @click="deletePost(post._id)">Delete</a>
</td>
</tr>
</table>
</div>
</div>
</template>
<script>
import PostsService from '@/services/PostsService'
export default {
name: 'posts',
props: ['name'],
data () {
return {
posts: [],
description: ''
}
},
mounted () {
this.getPosts()
},
methods: {
async getPosts () {
const response = await PostsService.fetchPosts()
this.posts = response.data.posts
console.log(this.posts)
},
async addPost () {
await PostsService.addPost({
name: this.name,
description: this.description
})
this.getPosts()
},
async deletePost (id) {
await PostsService.deletePost(id)
this.getPosts()
}
}
}
</script>
app.js
const express = require('express')
const bodyParser = require('body-parser')
const cors = require('cors')
const morgan = require('morgan')
var Post = require("../models/post");
var mongoose = require('mongoose');
mongoose.connect('CONNECTION STRING');
var db = mongoose.connection;
db.on("error", console.error.bind(console, "connection error"));
db.once("open", function(callback){
console.log("Connection Succeeded");
});
const app = express()
app.use(morgan('combined'))
app.use(bodyParser.json())
app.use(cors())
app.get('/posts', (req, res) => {
Post.find({}, 'title description', function (error, posts) {
if (error) { console.error(error); }
res.send({
posts: posts
})
}).sort({_id: -1})
})
app.post('/posts', (req, res) => {
var db = req.db
var name = req.body.name
var description = req.body.description
var new_post = new Post({
name: name,
description: description
})
new_post.save(function (error) {
if (error) {
console.log(error)
}
res.send({
success: true,
message: 'Post saved successfully'
})
})
})
app.delete('/posts/:id', (req,res) => {
var db = req.db;
Post.remove({
_id: req.params.id
}, function(err, post){
if (err)
res.send(err)
res.send({
success: true
})
})
})
app.listen(process.env.PORT || 8081)
post.js(猫鼬模式)
var mongoose = require("mongoose");
var Schema = mongoose.Schema;
var PostSchema = new Schema({
name: String,
title: String,
description: String
});
var Post = mongoose.model("Post", PostSchema);
module.exports = Post;
实际上,您根本没有从数据库返回name
,请参阅Post.find
的第二个参数。
只需添加一个name
:
Post.find({}, 'title description name', function (error, posts) {
if (error) { console.error(error); }
res.send({
posts: posts
})
}).sort({_id: -1})
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