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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Multi-user profiles: PIN gate, per-user cache visibility, and download grants."><title>MIGRATION_024 in jellytau_lib::storage::schema - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../../static.files/rustdoc-17e0aaed.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="jellytau_lib" data-themes="" data-resource-suffix="" data-rustdoc-version="1.97.1 (8bab26f4f 2026-07-14)" data-channel="1.97.1" data-search-js="search-fd9372ac.js" data-stringdex-js="stringdex-2da4960a.js" data-settings-js="settings-170eb4bf.js" ><script src="../../../static.files/storage-41dd4d93.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../../static.files/main-fcd733ba.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-f7c3ffd8.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-044be391.svg"></head><body class="rustdoc constant"><a class="skip-main-content" href="#main-content">Skip to main content</a><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">MIGRATION_024</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../../jellytau_lib/index.html">jellytau_<wbr>lib</a><span class="version">0.11.5</span></h2></div><div class="sidebar-elems"><div id="rustdoc-modnav"><h2><a href="index.html">In jellytau_<wbr>lib::<wbr>storage::<wbr>schema</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content" tabindex="-1"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../../index.html">jellytau_lib</a>::<wbr><a href="../index.html">storage</a>::<wbr><a href="index.html">schema</a></div><h1>Constant <span class="constant">MIGRATION_<wbr>024</span> <button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../../src/jellytau_lib/storage/schema.rs.html#846-897">Source</a> </span></div><pre class="rust item-decl"><code>const MIGRATION_024: &<a class="primitive" href="https://doc.rust-lang.org/1.97.1/std/primitive.str.html">str</a> = r#"
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CREATE TABLE IF NOT EXISTS user_pins (
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user_id TEXT PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
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pin_hash TEXT NOT NULL,
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failed_count INTEGER NOT NULL DEFAULT 0,
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locked_until TEXT,
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updated_at TEXT DEFAULT CURRENT_TIMESTAMP
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);
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CREATE TABLE IF NOT EXISTS user_item_visibility (
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user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
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item_id TEXT NOT NULL,
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seen_at TEXT DEFAULT CURRENT_TIMESTAMP,
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PRIMARY KEY (user_id, item_id)
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);
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CREATE INDEX IF NOT EXISTS idx_visibility_user ON user_item_visibility(user_id);
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CREATE TABLE IF NOT EXISTS user_libraries (
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user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
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library_id TEXT NOT NULL,
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seen_at TEXT DEFAULT CURRENT_TIMESTAMP,
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PRIMARY KEY (user_id, library_id)
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);
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CREATE TABLE IF NOT EXISTS download_grants (
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user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
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download_id INTEGER NOT NULL REFERENCES downloads(id) ON DELETE CASCADE,
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granted_at TEXT DEFAULT CURRENT_TIMESTAMP,
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PRIMARY KEY (user_id, download_id)
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);
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CREATE INDEX IF NOT EXISTS idx_download_grants_download ON download_grants(download_id);
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-- Backfill: the active user has seen everything already cached on this device.
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INSERT OR IGNORE INTO user_item_visibility (user_id, item_id)
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SELECT u.id, i.id
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FROM users u CROSS JOIN items i
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WHERE u.is_active = 1
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OR (SELECT COUNT(*) FROM users WHERE is_active = 1) = 0;
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INSERT OR IGNORE INTO user_libraries (user_id, library_id)
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SELECT u.id, l.id
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FROM users u CROSS JOIN libraries l
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WHERE u.is_active = 1
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OR (SELECT COUNT(*) FROM users WHERE is_active = 1) = 0;
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-- Downloads already record who asked for them, so every existing row becomes
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-- exactly one grant held by its original requester.
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INSERT OR IGNORE INTO download_grants (user_id, download_id)
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SELECT d.user_id, d.id FROM downloads d;
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"#;</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Multi-user profiles: PIN gate, per-user cache visibility, and download grants.</p>
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<p>Three tables, one purpose each:</p>
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<ul>
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<li><code>user_pins</code> holds the switching gate. The PIN hash lives here rather than
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wrapping the access token, because a wrapped token would leave a locked
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profile unable to resume its own downloads or drain its own sync queue
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until someone typed the code. See DR-268 for why that trade was taken.</li>
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<li><code>user_item_visibility</code> records what the server has actually shown to each
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user. It is written as a byproduct of the cache write path, never rebuilt,
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so it cannot disagree with what the server returned.</li>
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<li><code>download_grants</code> separates the bytes from the claim on them, so one file
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can serve several profiles and is unlinked only when the last claim goes.</li>
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</ul>
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<p>The backfill is not optional. Every existing cache row and download predates
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the concept of a user; without it an upgrading install’s library goes blank.
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It grants the <em>active</em> user only — other pre-existing rows re-populate from
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the server on next browse, which is strictly safer than handing every
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profile the whole cache. The <code>OR (SELECT COUNT(*) ...) = 0</code> arm covers an
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install whose single user somehow has <code>is_active = 0</code>.</p>
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<p>TRACES: UR-082, UR-083 | DR-268, DR-271, DR-272</p>
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</div></details></section></div></main></body></html>
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