sanbuphy
73f4788d7e
- Update READMEs and docs across multiple languages - Enhance interactive demos for Agent, LLM, VLM, Audio, Image Gen, Terminal, and Web Basics - Add new appendix sections for Database and IDE intros - Update VitePress config, theme, and utility scripts - Clean up unused assets and components
313 lines
7.2 KiB
Vue
313 lines
7.2 KiB
Vue
<script setup>
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import { ref } from 'vue'
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const activeTab = ref('excel') // 'excel' or 'db'
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// Excel Data (Flat, Redundant)
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const excelData = [
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{
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id: 1,
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date: '2023-10-01',
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book: 'AI 入门',
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price: 59,
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user: '张三',
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phone: '13800138000'
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},
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{
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id: 2,
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date: '2023-10-02',
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book: 'Python 编程',
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price: 89,
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user: '李四',
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phone: '13900139000'
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},
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{
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id: 3,
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date: '2023-10-03',
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book: '算法导论',
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price: 120,
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user: '张三',
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phone: '13800138000'
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},
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{
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id: 4,
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date: '2023-10-03',
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book: '数据库原理',
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price: 45,
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user: '王五',
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phone: '13700137000'
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},
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{
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id: 5,
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date: '2023-10-04',
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book: 'Vue.js 实战',
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price: 78,
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user: '张三',
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phone: '13800138000'
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}
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]
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// DB Data (Normalized)
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const usersTable = [
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{ id: 101, name: '张三', phone: '13800138000' },
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{ id: 102, name: '李四', phone: '13900139000' },
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{ id: 103, name: '王五', phone: '13700137000' }
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]
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const ordersTable = [
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{ id: 1, date: '2023-10-01', book: 'AI 入门', price: 59, user_id: 101 },
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{ id: 2, date: '2023-10-02', book: 'Python 编程', price: 89, user_id: 102 },
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{ id: 3, date: '2023-10-03', book: '算法导论', price: 120, user_id: 101 },
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{ id: 4, date: '2023-10-03', book: '数据库原理', price: 45, user_id: 103 },
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{ id: 5, date: '2023-10-04', book: 'Vue.js 实战', price: 78, user_id: 101 }
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]
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const hoveredUserId = ref(null)
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const setHover = (id) => {
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hoveredUserId.value = id
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}
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</script>
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<template>
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<div class="relational-demo">
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<div class="tabs">
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<div
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class="tab"
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:class="{ active: activeTab === 'excel' }"
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@click="activeTab = 'excel'"
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>
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Excel 模式 (单表)
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</div>
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<div
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class="tab"
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:class="{ active: activeTab === 'db' }"
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@click="activeTab = 'db'"
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>
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数据库模式 (多表关联)
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</div>
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</div>
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<div class="content-area">
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<!-- Excel Mode -->
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<div v-if="activeTab === 'excel'" class="excel-view">
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<div class="table-wrapper">
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<table>
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<thead>
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<tr>
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<th>订单号</th>
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<th>日期</th>
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<th>书名</th>
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<th>价格</th>
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<th class="highlight-col">购买者</th>
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<th class="highlight-col">电话</th>
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</tr>
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</thead>
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<tbody>
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<tr v-for="row in excelData" :key="row.id">
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<td>{{ row.id }}</td>
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<td>{{ row.date }}</td>
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<td>{{ row.book }}</td>
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<td>{{ row.price }}</td>
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<td class="highlight-cell">{{ row.user }}</td>
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<td class="highlight-cell">{{ row.phone }}</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="note error">
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<p>❌ <strong>问题：</strong> "张三"的信息重复存储了 3 次。</p>
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<p>如果张三换了电话，你需要修改 3 行数据，很容易漏改！</p>
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</div>
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</div>
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<!-- DB Mode -->
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<div v-else class="db-view">
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<div class="db-layout">
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<!-- Users Table -->
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<div class="db-table users-table">
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<div class="table-title">用户表 (Users)</div>
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<table>
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<thead>
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<tr>
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<th>ID (主键)</th>
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<th>姓名</th>
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<th>电话</th>
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</tr>
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</thead>
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<tbody>
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<tr
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v-for="u in usersTable"
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:key="u.id"
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:class="{ active: hoveredUserId === u.id }"
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@mouseenter="setHover(u.id)"
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@mouseleave="setHover(null)"
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>
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<td>{{ u.id }}</td>
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<td>{{ u.name }}</td>
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<td>{{ u.phone }}</td>
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</tr>
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</tbody>
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</table>
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</div>
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<!-- Connection Lines (Visual only, simplified) -->
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<div class="connector">
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<div class="arrow">⬅️ 关联 (Join) ➡️</div>
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</div>
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<!-- Orders Table -->
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<div class="db-table orders-table">
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<div class="table-title">订单表 (Orders)</div>
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<table>
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<thead>
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<tr>
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<th>订单号</th>
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<th>书名</th>
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<th>价格</th>
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<th class="highlight-col">用户 ID (外键)</th>
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</tr>
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</thead>
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<tbody>
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<tr
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v-for="o in ordersTable"
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:key="o.id"
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:class="{ active: hoveredUserId === o.user_id }"
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@mouseenter="setHover(o.user_id)"
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@mouseleave="setHover(null)"
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>
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<td>{{ o.id }}</td>
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<td>{{ o.book }}</td>
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<td>{{ o.price }}</td>
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<td class="highlight-cell">{{ o.user_id }}</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div class="note success">
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<p>✅ <strong>优势：</strong> 订单表只存 "用户 ID"。</p>
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<p>
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鼠标悬停在某一行，看看它们是如何自动关联的。修改用户表一次，所有订单都会自动更新！
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</p>
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</div>
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</div>
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</div>
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</div>
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</template>
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<style scoped>
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.relational-demo {
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border: 1px solid #e4e7ed;
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border-radius: 8px;
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background: #fff;
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overflow: hidden;
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margin: 20px 0;
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font-family: sans-serif;
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}
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.tabs {
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display: flex;
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background: #f5f7fa;
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border-bottom: 1px solid #e4e7ed;
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}
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.tab {
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padding: 12px 24px;
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cursor: pointer;
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font-size: 14px;
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color: #606266;
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border-right: 1px solid #e4e7ed;
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transition: all 0.2s;
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}
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.tab.active {
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background: #fff;
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color: #409eff;
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font-weight: bold;
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border-bottom: 2px solid #409eff;
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margin-bottom: -1px;
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}
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.content-area {
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padding: 20px;
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}
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.table-wrapper {
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overflow-x: auto;
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}
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table {
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width: 100%;
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border-collapse: collapse;
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font-size: 13px;
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}
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th,
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td {
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border: 1px solid #ebeef5;
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padding: 8px 12px;
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text-align: left;
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}
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th {
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background: #fafafa;
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font-weight: bold;
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color: #303133;
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}
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.highlight-col {
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background: #ecf5ff;
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color: #409eff;
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}
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.highlight-cell {
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background: #f0f9eb;
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color: #67c23a;
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font-weight: bold;
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}
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.excel-view .highlight-cell {
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background: #fef0f0;
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color: #f56c6c;
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}
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.db-layout {
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display: flex;
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gap: 20px;
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align-items: flex-start;
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flex-wrap: wrap;
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}
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.db-table {
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flex: 1;
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min-width: 280px;
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border: 1px solid #ebeef5;
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border-radius: 4px;
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overflow: hidden;
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}
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.table-title {
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background: #f2f6fc;
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padding: 8px 12px;
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font-weight: bold;
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font-size: 13px;
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color: #606266;
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border-bottom: 1px solid #ebeef5;
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}
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.connector {
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display: flex;
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align-items: center;
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justify-content: center;
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padding-top: 50px;
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font-size: 12px;
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color: #909399;
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}
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tr.active {
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background: #ecf5ff;
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}
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.note {
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margin-top: 15px;
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padding: 12px;
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border-radius: 4px;
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font-size: 13px;
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line-height: 1.6;
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}
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.note.error {
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background: #fef0f0;
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color: #f56c6c;
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}
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.note.success {
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background: #f0f9eb;
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color: #67c23a;
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}
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</style>
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