131 lines
2.6 KiB
HTML
131 lines
2.6 KiB
HTML
<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8" />
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<title>biz_key 私聊演示</title>
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<style>
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body {
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font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
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Helvetica, Arial, sans-serif;
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background: #f5f7fa;
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padding: 40px;
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}
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h1 {
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margin-bottom: 24px;
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}
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.container {
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display: flex;
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gap: 24px;
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align-items: flex-start;
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}
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.card {
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background: #fff;
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border-radius: 8px;
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padding: 16px;
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width: 240px;
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box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
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}
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.card h2 {
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font-size: 16px;
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margin-bottom: 12px;
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border-bottom: 1px solid #eee;
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padding-bottom: 8px;
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}
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.user {
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padding: 10px;
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margin-bottom: 8px;
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background: #f0f3f7;
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border-radius: 6px;
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}
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.arrow {
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font-size: 32px;
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margin: 0 8px;
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align-self: center;
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}
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.biz {
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background: #e8f3ff;
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border: 1px dashed #409eff;
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padding: 12px;
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border-radius: 6px;
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text-align: center;
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font-weight: bold;
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color: #409eff;
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}
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.db-row {
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background: #f6ffed;
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border: 1px solid #b7eb8f;
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padding: 10px;
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border-radius: 6px;
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margin-bottom: 8px;
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font-family: monospace;
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font-size: 13px;
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}
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.note {
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margin-top: 24px;
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color: #666;
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font-size: 14px;
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}
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</style>
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</head>
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<body>
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<h1>biz_key 私聊唯一性演示</h1>
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<div class="container">
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<!-- 用户 -->
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<div class="card">
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<h2>用户</h2>
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<div class="user">用户 A<br />user_id = 1</div>
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<div class="user">用户 B<br />user_id = 2</div>
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</div>
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<div class="arrow">➡️</div>
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<!-- biz_key -->
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<div class="card">
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<h2>biz_key 生成</h2>
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<div class="biz">
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min(1,2) _ max(1,2)<br />
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= <br />
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<strong>1_2</strong>
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</div>
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<div class="note">
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不管 A→B 还是 B→A<br />
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biz_key 都是一样的
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</div>
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</div>
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<div class="arrow">➡️</div>
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<!-- 数据库 -->
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<div class="card">
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<h2>数据库会话表</h2>
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<div class="db-row">
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id: 1001<br />
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space_id: 100<br />
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type: 私聊<br />
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biz_key: 1_2
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</div>
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<div class="note">
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唯一索引：<br />
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(space_id, type, biz_key)
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</div>
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</div>
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</div>
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<div class="note">
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👉 结论：<br />
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<strong>biz_key = “这是谁和谁的私聊”</strong><br />
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<strong>id = “数据库给它的编号”</strong>
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</div>
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</body>
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</html>
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