169 lines
5.6 KiB
HTML
169 lines
5.6 KiB
HTML
<!doctype html>
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<html>
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<link
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rel="stylesheet"
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href="https://cdnjs.cloudflare.com/ajax/libs/github-markdown-css/5.2.0/github-markdown.min.css"
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<title>haunt98 posts</title>
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</head>
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<style>
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.markdown-body {
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box-sizing: border-box;
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min-width: 200px;
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max-width: 980px;
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margin: 0 auto;
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<body class="markdown-body">
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<h2>
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<a href="index.html"><code>~</code></a>
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</h2>
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<h1 id="user-content-uuid-or-else">
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<a class="heading-link" href="#uuid-or-else"
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>UUID or else<span
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aria-hidden="true"
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class="octicon octicon-link"
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></span
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></a>
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</h1>
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<p>
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There are many use cases where we need to use a unique ID. In my
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experience, I only encouter 2 cases:
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</p>
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<ul>
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<li>
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ID to trace request from client to server, from service to service
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(microservice architecture or nanoservice I don't know).
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</li>
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<li>Primary key for database.</li>
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</ul>
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<p>In my Go universe, there are some libs to help us with this:</p>
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<ul>
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<li><a href="https://github.com/google/uuid">google/uuid</a></li>
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<li><a href="https://github.com/rs/xid">rs/xid</a></li>
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<li><a href="https://github.com/segmentio/ksuid">segmentio/ksuid</a></li>
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<li><a href="https://github.com/oklog/ulid">oklog/ulid</a></li>
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</ul>
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<h2 id="user-content-first-use-case-is-trace-id-or-context-aware-id">
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<a
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class="heading-link"
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href="#first-use-case-is-trace-id-or-context-aware-id"
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>First use case is trace ID, or context aware ID<span
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aria-hidden="true"
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class="octicon octicon-link"
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></span
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></a>
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</h2>
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<p>
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The ID is used only for trace and log. If same ID is generated twice
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(because maybe the possibilty is too small but not 0), honestly I don't
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care. When I use that ID to search log , if it pops more than things I
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care for, it is still no harm to me.
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</p>
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<p>
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My choice for this use case is <strong>rs/xid</strong>. Because it is
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small (not span too much on log line) and copy friendly.
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</p>
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<h2 id="user-content-second-use-case-is-primary-key-also-hard-choice">
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<a
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class="heading-link"
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href="#second-use-case-is-primary-key-also-hard-choice"
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>Second use case is primary key, also hard choice<span
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aria-hidden="true"
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class="octicon octicon-link"
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></span
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></a>
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</h2>
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<p>
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Why I don't use auto increment key for primary key? The answer is simple,
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I don't want to write database specific SQL. SQLite has some different
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syntax from MySQL, and PostgreSQL and so on. Every logic I can move to
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application layer from database layer, I will.
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</p>
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<p>
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In the past and present, I use <strong>google/uuid</strong>, specificially
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I use UUID v4. In the future I will look to use
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<strong>segmentio/ksuid</strong> and <strong>oklog/ulid</strong> (trial
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and error of course). Both are sortable, but
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<strong>google/uuid</strong> is not. The reason I'm afraid because the
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database is sensitive subject, and I need more testing and battle test
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proof to trust those libs.
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</p>
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<h2 id="user-content-what-else">
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<a class="heading-link" href="#what-else"
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>What else?<span aria-hidden="true" class="octicon octicon-link"></span
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></a>
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</h2>
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<p>
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I think about adding prefix to ID to identify which resource that ID
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represents.
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</p>
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<h2 id="user-content-thanks">
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<a class="heading-link" href="#thanks"
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>Thanks<span aria-hidden="true" class="octicon octicon-link"></span
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></a>
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</h2>
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<ul>
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<li>
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<a
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href="https://www.cybertec-postgresql.com/en/uuid-serial-or-identity-columns-for-postgresql-auto-generated-primary-keys/"
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rel="nofollow"
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>UUID, SERIAL OR IDENTITY COLUMNS FOR POSTGRESQL AUTO-GENERATED
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PRIMARY KEYS?</a
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>
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</li>
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<li>
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<a href="https://brandur.org/nanoglyphs/026-ids" rel="nofollow"
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>Identity Crisis: Sequence v. UUID as Primary Key</a
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>
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</li>
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<li>
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<a
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href="https://blog.kowalczyk.info/article/JyRZ/generating-good-unique-ids-in-go.html"
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rel="nofollow"
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>Generating good unique ids in Go</a
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>
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</li>
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<li>
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<a
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href="https://encore.dev/blog/go-1.18-generic-identifiers"
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rel="nofollow"
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>How we used Go 1.18 when designing our Identifiers</a
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>
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</li>
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<li>
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<a href="https://blog.daveallie.com/ulid-primary-keys" rel="nofollow"
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>ULIDs and Primary Keys</a
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>
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</li>
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<li>
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<a href="https://0pointer.net/blog/projects/ids.html" rel="nofollow"
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>On IDs</a
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>
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</li>
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</ul>
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<div>
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Feel free to ask me via
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<a href="mailto:hauvipapro+posts@gmail.com">email</a> or
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<a rel="me" href="https://hachyderm.io/@haunguyen">Mastodon</a>.
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<br />Source code is available on
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<a href="https://github.com/haunt98/posts-go">GitHub</a>
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<a href="https://codeberg.org/yoshie/posts-go">Codeberg</a>
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<a href="https://git.sr.ht/~youngyoshie/posts-go">sourcehut</a>
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<a href="https://gitea.treehouse.systems/yoshie/posts-go">Treehouse</a>
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<a href="https://gitlab.com/youngyoshie/posts-go">GitLab</a>
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</div>
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</body>
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</html>
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