vue发布动态功能实现

实现Vue动态发布功能

前端实现

使用Vue.js构建动态发布表单，包含文本输入和图片上传功能

<template>
  <div>
    <textarea v-model="content" placeholder="分享你的想法..."></textarea>
    <input type="file" @change="handleFileUpload" accept="image/*">
    <button @click="postDynamic">发布</button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      content: '',
      images: []
    }
  },
  methods: {
    handleFileUpload(e) {
      this.images = Array.from(e.target.files)
    },
    async postDynamic() {
      const formData = new FormData()
      formData.append('content', this.content)
      this.images.forEach(img => {
        formData.append('images', img)
      })

      try {
        await axios.post('/api/dynamics', formData)
        this.$emit('posted')
        this.content = ''
        this.images = []
      } catch (error) {
        console.error(error)
      }
    }
  }
}
</script>

后端API设计

Node.js Express示例处理动态发布请求

const express = require('express')
const multer = require('multer')
const upload = multer({ dest: 'uploads/' })

router.post('/dynamics', upload.array('images'), async (req, res) => {
  try {
    const { content } = req.body
    const images = req.files.map(file => file.path)

    const newDynamic = new Dynamic({
      content,
      images,
      author: req.user.id
    })

    await newDynamic.save()
    res.status(201).json(newDynamic)
  } catch (error) {
    res.status(500).json({ error: error.message })
  }
})

数据库模型

MongoDB动态数据模型设计

const mongoose = require('mongoose')

const dynamicSchema = new mongoose.Schema({
  content: String,
  images: [String],
  author: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User'
  },
  likes: [{
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User'
  }],
  comments: [{
    type: mongoose.Schema.Types.ObjectId,
    ref: 'Comment'
  }],
  createdAt: {
    type: Date,
    default: Date.now
  }
})

module.exports = mongoose.model('Dynamic', dynamicSchema)

图片处理

使用Sharp库进行图片优化处理

const sharp = require('sharp')

async function processImage(file) {
  const filename = `${Date.now()}.webp`
  await sharp(file.path)
    .resize(800, 800, { fit: 'inside' })
    .webp({ quality: 80 })
    .toFile(`public/uploads/${filename}`)
  return `/uploads/${filename}`
}

前端展示动态列表

Vue组件展示动态列表

<template>
  <div v-for="dynamic in dynamics" :key="dynamic._id">
    <p>{{ dynamic.content }}</p>
    <div v-for="img in dynamic.images" :key="img">
      <img :src="img" alt="动态图片">
    </div>
    <button @click="likeDynamic(dynamic._id)">点赞</button>
  </div>
</template>

<script>
export default {
  props: ['dynamics'],
  methods: {
    async likeDynamic(id) {
      await axios.post(`/api/dynamics/${id}/like`)
      this.$emit('liked')
    }
  }
}
</script>