- collect.py copies each repo's built site contents directly to a top-level <repo>/ dir (was libs|apis|wiki/<repo>/site nesting) - nginx uses `index index.html lib/index.html api/index.html` so /dagpipe/ -> lib/index.html, /auth-server/ -> api/index.html are served internally with no redirects - _index regenerates links against the flat layout (/dagpipe/lib/, /auth-server/api/, /mongo-ops/, /blog/...) - config.yml static entries point at vendored blog/ + media-manager/ - Dockerfile copies per-repo dirs flat into the nginx html root - removed stale libs/, apis/, wiki/, tutorials/ category trees
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HTML
1217 lines
36 KiB
HTML
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<!doctype html>
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<link rel="prev" href="../06_multi_model/">
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Mongo Ops Documentation
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Caching
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</div>
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<div class="md-search-result__meta">
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<a href="../../01_overview/" class="md-tabs__link">
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Overview
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</a>
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<li class="md-tabs__item md-tabs__item--active">
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<a href="../../02_components/" class="md-tabs__link">
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Core Components
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</a>
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</li>
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<li class="md-tabs__item">
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<a href="../../04_best_practices/" class="md-tabs__link">
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Best Practices
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</a>
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<a href="../../05_patterns/" class="md-tabs__link">
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Common Patterns
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</a>
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<a href="../../06_error_handling/" class="md-tabs__link">
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Error Handling
|
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</a>
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<li class="md-tabs__item">
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<a href="../../07_testing_example/" class="md-tabs__link">
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Testing Example
|
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</a>
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<main class="md-main" data-md-component="main">
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<div class="md-sidebar__scrollwrap">
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<div class="md-sidebar__inner">
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<nav class="md-nav md-nav--primary md-nav--lifted md-nav--integrated" aria-label="Navigation" data-md-level="0">
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<label class="md-nav__title" for="__drawer">
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<a href="../.." title="Mongo Ops Documentation" class="md-nav__button md-logo" aria-label="Mongo Ops Documentation" data-md-component="logo">
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 3C7.58 3 4 4.79 4 7s3.58 4 8 4 8-1.79 8-4-3.58-4-8-4M4 9v3c0 2.21 3.58 4 8 4s8-1.79 8-4V9c0 2.21-3.58 4-8 4s-8-1.79-8-4m0 5v3c0 2.21 3.58 4 8 4s8-1.79 8-4v-3c0 2.21-3.58 4-8 4s-8-1.79-8-4"/></svg>
|
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</a>
|
||
Mongo Ops Documentation
|
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</label>
|
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|
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
|
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<a href="../.." class="md-nav__link">
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<span class="md-ellipsis">
|
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Home
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|
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|
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<li class="md-nav__item">
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<a href="../../01_overview/" class="md-nav__link">
|
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<span class="md-ellipsis">
|
||
Overview
|
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|
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</span>
|
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|
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|
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</a>
|
||
</li>
|
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|
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|
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<span class="md-ellipsis">
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Core Components
|
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|
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</span>
|
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<span class="md-nav__icon md-icon"></span>
|
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</label>
|
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<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_3_label" aria-expanded="true">
|
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<label class="md-nav__title" for="__nav_3">
|
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<span class="md-nav__icon md-icon"></span>
|
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Core Components
|
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|
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<ul class="md-nav__list" data-md-scrollfix>
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|
||
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|
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|
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<span class="md-ellipsis">
|
||
02 components
|
||
|
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|
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|
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|
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</a>
|
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<li class="md-nav__item md-nav__item--active md-nav__item--section md-nav__item--nested">
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<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_3_2" checked>
|
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<label class="md-nav__link" for="__nav_3_2" id="__nav_3_2_label" tabindex="">
|
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|
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<span class="md-ellipsis">
|
||
Use Cases
|
||
|
||
</span>
|
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<span class="md-nav__icon md-icon"></span>
|
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</label>
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<nav class="md-nav" data-md-level="2" aria-labelledby="__nav_3_2_label" aria-expanded="true">
|
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<label class="md-nav__title" for="__nav_3_2">
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<span class="md-nav__icon md-icon"></span>
|
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Use Cases
|
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</label>
|
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
|
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<a href="../01_basic_crud/" class="md-nav__link">
|
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<span class="md-ellipsis">
|
||
Basic CRUD
|
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|
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</span>
|
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|
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</a>
|
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<li class="md-nav__item">
|
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<a href="../02_custom_repo/" class="md-nav__link">
|
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|
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|
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<span class="md-ellipsis">
|
||
Custom Repo
|
||
|
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</span>
|
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|
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|
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</a>
|
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</li>
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<li class="md-nav__item">
|
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<a href="../03_transactions/" class="md-nav__link">
|
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|
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|
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|
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<span class="md-ellipsis">
|
||
Transactions
|
||
|
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</span>
|
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|
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|
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</a>
|
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</li>
|
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<li class="md-nav__item">
|
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<a href="../04_pagination/" class="md-nav__link">
|
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<span class="md-ellipsis">
|
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Pagination
|
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<a href="../05_soft_deletes/" class="md-nav__link">
|
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<span class="md-ellipsis">
|
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Soft Deletes
|
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|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../06_multi_model/" class="md-nav__link">
|
||
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Multi Model
|
||
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
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|
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<li class="md-nav__item md-nav__item--active">
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|
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<label class="md-nav__link md-nav__link--active" for="__toc">
|
||
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Caching
|
||
|
||
</span>
|
||
|
||
|
||
<span class="md-nav__icon md-icon"></span>
|
||
</label>
|
||
|
||
<a href="./" class="md-nav__link md-nav__link--active">
|
||
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Caching
|
||
|
||
</span>
|
||
|
||
|
||
</a>
|
||
|
||
|
||
|
||
<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
|
||
|
||
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||
|
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|
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|
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<label class="md-nav__title" for="__toc">
|
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<span class="md-nav__icon md-icon"></span>
|
||
Table of contents
|
||
</label>
|
||
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#1-whats-new" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
1️⃣ What’s New?
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#2-quick-start" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
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2️⃣ Quick Start
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#3-using-the-repository" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
3️⃣ Using the Repository
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#4-redis-backend-optional" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
4️⃣ Redis Backend (optional)
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#5-when-to-use-caching" class="md-nav__link">
|
||
<span class="md-ellipsis">
|
||
5️⃣ When to Use Caching
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
<li class="md-nav__item">
|
||
<a href="#6-related-docs" class="md-nav__link">
|
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<span class="md-ellipsis">
|
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6️⃣ Related Docs
|
||
</span>
|
||
</a>
|
||
|
||
</li>
|
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|
||
</ul>
|
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</nav>
|
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|
||
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|
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||
|
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|
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<li class="md-nav__item">
|
||
<a href="../08_population/" class="md-nav__link">
|
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|
||
|
||
|
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<span class="md-ellipsis">
|
||
Population
|
||
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
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||
|
||
|
||
|
||
|
||
|
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|
||
|
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|
||
<li class="md-nav__item">
|
||
<a href="../09_advanced_population/" class="md-nav__link">
|
||
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Advanced Population
|
||
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../10_cache_and_population/" class="md-nav__link">
|
||
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Cache + Population
|
||
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../11_cache_lifecycle/" class="md-nav__link">
|
||
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Cache Lifecycle
|
||
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
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|
||
<li class="md-nav__item">
|
||
<a href="../12_transaction_helper/" class="md-nav__link">
|
||
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Transaction Helper
|
||
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../13_index_creation/" class="md-nav__link">
|
||
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Index Creation
|
||
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../14_testing_guide/" class="md-nav__link">
|
||
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Testing Guide
|
||
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
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</ul>
|
||
</nav>
|
||
|
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</li>
|
||
|
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|
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|
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|
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</ul>
|
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</nav>
|
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|
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</li>
|
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|
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|
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|
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|
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|
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<li class="md-nav__item">
|
||
<a href="../../04_best_practices/" class="md-nav__link">
|
||
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Best Practices
|
||
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
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||
|
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|
||
|
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|
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|
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|
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|
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<li class="md-nav__item">
|
||
<a href="../../05_patterns/" class="md-nav__link">
|
||
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Common Patterns
|
||
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
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|
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|
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|
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<li class="md-nav__item">
|
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<a href="../../06_error_handling/" class="md-nav__link">
|
||
|
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|
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|
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<span class="md-ellipsis">
|
||
Error Handling
|
||
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<li class="md-nav__item">
|
||
<a href="../../07_testing_example/" class="md-nav__link">
|
||
|
||
|
||
|
||
<span class="md-ellipsis">
|
||
Testing Example
|
||
|
||
</span>
|
||
|
||
|
||
</a>
|
||
</li>
|
||
|
||
|
||
|
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</ul>
|
||
</nav>
|
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|
||
</div>
|
||
</div>
|
||
|
||
|
||
|
||
|
||
<div class="md-content" data-md-component="content">
|
||
<article class="md-content__inner md-typeset">
|
||
|
||
|
||
|
||
|
||
|
||
<h1 id="use-case-7-caching-for-highperformance-reads">Use Case 7: Caching for High‑Performance Reads</h1>
|
||
<p><strong>Scenario:</strong> A read‑heavy API (e.g., product catalog) benefits from an in‑memory cache or Redis cache to reduce latency and DB load.</p>
|
||
<hr />
|
||
<h2 id="1-whats-new">1️⃣ What’s New?</h2>
|
||
<ul>
|
||
<li><strong>Cache back‑ends</strong>: <code>InMemoryCacheBackend</code> (TTL + LRU) and <code>RedisCacheBackend</code> (JSON‑serialised values, pub/sub invalidation).</li>
|
||
<li><strong>Cache configuration</strong> via <code>CacheConfig</code> (<code>enabled</code>, <code>backend</code>, <code>default_ttl</code>, …).</li>
|
||
<li><strong><code>CachedBaseRepository</code></strong> extends <code>BaseRepository</code> and adds:</li>
|
||
<li>Transparent ID‑based caching on <code>get_by_id</code>.</li>
|
||
<li>Automatic cache population on <code>create</code>.</li>
|
||
<li>Cache invalidation on <code>update</code>/<code>delete</code>.</li>
|
||
<li>Utility methods <code>warm_cache(ids)</code> and <code>invalidate_cache(id)</code>.</li>
|
||
</ul>
|
||
<hr />
|
||
<h2 id="2-quick-start">2️⃣ Quick Start</h2>
|
||
<div class="language-python highlight"><span class="filename">Python</span><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="kn">from</span><span class="w"> </span><span class="nn">mongo_ops</span><span class="w"> </span><span class="kn">import</span> <span class="p">(</span>
|
||
<a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a> <span class="n">BaseDocument</span><span class="p">,</span>
|
||
<a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a> <span class="n">CachedBaseRepository</span><span class="p">,</span>
|
||
<a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a> <span class="n">MongoConnectionManager</span><span class="p">,</span>
|
||
<a id="__codelineno-0-5" name="__codelineno-0-5" href="#__codelineno-0-5"></a> <span class="n">ModelRegistry</span><span class="p">,</span>
|
||
<a id="__codelineno-0-6" name="__codelineno-0-6" href="#__codelineno-0-6"></a> <span class="n">CacheConfig</span><span class="p">,</span>
|
||
<a id="__codelineno-0-7" name="__codelineno-0-7" href="#__codelineno-0-7"></a><span class="p">)</span>
|
||
<a id="__codelineno-0-8" name="__codelineno-0-8" href="#__codelineno-0-8"></a><span class="kn">from</span><span class="w"> </span><span class="nn">mongo_ops.cache</span><span class="w"> </span><span class="kn">import</span> <span class="n">InMemoryCacheBackend</span>
|
||
<a id="__codelineno-0-9" name="__codelineno-0-9" href="#__codelineno-0-9"></a><span class="kn">from</span><span class="w"> </span><span class="nn">bson</span><span class="w"> </span><span class="kn">import</span> <span class="n">ObjectId</span>
|
||
<a id="__codelineno-0-10" name="__codelineno-0-10" href="#__codelineno-0-10"></a>
|
||
<a id="__codelineno-0-11" name="__codelineno-0-11" href="#__codelineno-0-11"></a><span class="c1"># Define a model</span>
|
||
<a id="__codelineno-0-12" name="__codelineno-0-12" href="#__codelineno-0-12"></a><span class="k">class</span><span class="w"> </span><span class="nc">Product</span><span class="p">(</span><span class="n">BaseDocument</span><span class="p">):</span>
|
||
<a id="__codelineno-0-13" name="__codelineno-0-13" href="#__codelineno-0-13"></a> <span class="n">name</span><span class="p">:</span> <span class="nb">str</span>
|
||
<a id="__codelineno-0-14" name="__codelineno-0-14" href="#__codelineno-0-14"></a> <span class="n">price</span><span class="p">:</span> <span class="nb">float</span>
|
||
<a id="__codelineno-0-15" name="__codelineno-0-15" href="#__codelineno-0-15"></a>
|
||
<a id="__codelineno-0-16" name="__codelineno-0-16" href="#__codelineno-0-16"></a><span class="c1"># Initialise cache backend (in‑memory example)</span>
|
||
<a id="__codelineno-0-17" name="__codelineno-0-17" href="#__codelineno-0-17"></a><span class="n">cache</span> <span class="o">=</span> <span class="n">InMemoryCacheBackend</span><span class="p">(</span><span class="n">max_entries</span><span class="o">=</span><span class="mi">10_000</span><span class="p">,</span> <span class="n">default_ttl</span><span class="o">=</span><span class="mi">300</span><span class="p">)</span>
|
||
<a id="__codelineno-0-18" name="__codelineno-0-18" href="#__codelineno-0-18"></a><span class="c1"># Register the cache so the registry can initialise it later</span>
|
||
<a id="__codelineno-0-19" name="__codelineno-0-19" href="#__codelineno-0-19"></a><span class="n">ModelRegistry</span><span class="o">.</span><span class="n">set_cache_backend</span><span class="p">(</span><span class="n">cache</span><span class="p">)</span>
|
||
<a id="__codelineno-0-20" name="__codelineno-0-20" href="#__codelineno-0-20"></a>
|
||
<a id="__codelineno-0-21" name="__codelineno-0-21" href="#__codelineno-0-21"></a><span class="c1"># Repository with caching</span>
|
||
<a id="__codelineno-0-22" name="__codelineno-0-22" href="#__codelineno-0-22"></a><span class="k">class</span><span class="w"> </span><span class="nc">ProductRepo</span><span class="p">(</span><span class="n">CachedBaseRepository</span><span class="p">[</span><span class="n">Product</span><span class="p">]):</span>
|
||
<a id="__codelineno-0-23" name="__codelineno-0-23" href="#__codelineno-0-23"></a> <span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
|
||
<a id="__codelineno-0-24" name="__codelineno-0-24" href="#__codelineno-0-24"></a> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span>
|
||
<a id="__codelineno-0-25" name="__codelineno-0-25" href="#__codelineno-0-25"></a> <span class="n">collection_name</span><span class="o">=</span><span class="s2">"products"</span><span class="p">,</span>
|
||
<a id="__codelineno-0-26" name="__codelineno-0-26" href="#__codelineno-0-26"></a> <span class="n">model</span><span class="o">=</span><span class="n">Product</span><span class="p">,</span>
|
||
<a id="__codelineno-0-27" name="__codelineno-0-27" href="#__codelineno-0-27"></a> <span class="n">cache_backend</span><span class="o">=</span><span class="n">cache</span><span class="p">,</span>
|
||
<a id="__codelineno-0-28" name="__codelineno-0-28" href="#__codelineno-0-28"></a> <span class="n">config</span><span class="o">=</span><span class="n">CacheConfig</span><span class="p">(</span><span class="n">enabled</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">backend</span><span class="o">=</span><span class="s2">"memory"</span><span class="p">)</span>
|
||
<a id="__codelineno-0-29" name="__codelineno-0-29" href="#__codelineno-0-29"></a> <span class="p">)</span>
|
||
<a id="__codelineno-0-30" name="__codelineno-0-30" href="#__codelineno-0-30"></a>
|
||
<a id="__codelineno-0-31" name="__codelineno-0-31" href="#__codelineno-0-31"></a><span class="c1"># FastAPI lifespan – initialise DB and cache</span>
|
||
<a id="__codelineno-0-32" name="__codelineno-0-32" href="#__codelineno-0-32"></a><span class="k">async</span> <span class="k">def</span><span class="w"> </span><span class="nf">lifespan</span><span class="p">(</span><span class="n">app</span><span class="p">):</span>
|
||
<a id="__codelineno-0-33" name="__codelineno-0-33" href="#__codelineno-0-33"></a> <span class="k">async</span> <span class="k">with</span> <span class="n">MongoConnectionManager</span><span class="o">.</span><span class="n">lifespan</span><span class="p">(</span>
|
||
<a id="__codelineno-0-34" name="__codelineno-0-34" href="#__codelineno-0-34"></a> <span class="n">uri</span><span class="o">=</span><span class="s2">"mongodb://localhost:27017"</span><span class="p">,</span> <span class="n">db_name</span><span class="o">=</span><span class="s2">"shop"</span>
|
||
<a id="__codelineno-0-35" name="__codelineno-0-35" href="#__codelineno-0-35"></a> <span class="p">):</span>
|
||
<a id="__codelineno-0-36" name="__codelineno-0-36" href="#__codelineno-0-36"></a> <span class="k">await</span> <span class="n">ModelRegistry</span><span class="o">.</span><span class="n">initialize_all</span><span class="p">()</span>
|
||
<a id="__codelineno-0-37" name="__codelineno-0-37" href="#__codelineno-0-37"></a> <span class="k">await</span> <span class="n">ModelRegistry</span><span class="o">.</span><span class="n">initialize_cache</span><span class="p">()</span> <span class="c1"># Starts background cleanup, etc.</span>
|
||
<a id="__codelineno-0-38" name="__codelineno-0-38" href="#__codelineno-0-38"></a> <span class="k">yield</span>
|
||
</code></pre></div>
|
||
<hr />
|
||
<h2 id="3-using-the-repository">3️⃣ Using the Repository</h2>
|
||
<div class="language-python highlight"><span class="filename">Python</span><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="n">repo</span> <span class="o">=</span> <span class="n">ProductRepo</span><span class="p">()</span>
|
||
<a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a><span class="c1"># Create – automatically caches the new document</span>
|
||
<a id="__codelineno-1-3" name="__codelineno-1-3" href="#__codelineno-1-3"></a><span class="n">product</span> <span class="o">=</span> <span class="k">await</span> <span class="n">repo</span><span class="o">.</span><span class="n">create</span><span class="p">(</span><span class="n">Product</span><span class="p">(</span><span class="n">name</span><span class="o">=</span><span class="s2">"Widget"</span><span class="p">,</span> <span class="n">price</span><span class="o">=</span><span class="mf">9.99</span><span class="p">))</span>
|
||
<a id="__codelineno-1-4" name="__codelineno-1-4" href="#__codelineno-1-4"></a>
|
||
<a id="__codelineno-1-5" name="__codelineno-1-5" href="#__codelineno-1-5"></a><span class="c1"># Normal read – will hit the cache after the first DB fetch</span>
|
||
<a id="__codelineno-1-6" name="__codelineno-1-6" href="#__codelineno-1-6"></a><span class="n">fetched</span> <span class="o">=</span> <span class="k">await</span> <span class="n">repo</span><span class="o">.</span><span class="n">get_by_id</span><span class="p">(</span><span class="n">product</span><span class="o">.</span><span class="n">id</span><span class="p">)</span>
|
||
<a id="__codelineno-1-7" name="__codelineno-1-7" href="#__codelineno-1-7"></a>
|
||
<a id="__codelineno-1-8" name="__codelineno-1-8" href="#__codelineno-1-8"></a><span class="c1"># Update – cache entry is refreshed</span>
|
||
<a id="__codelineno-1-9" name="__codelineno-1-9" href="#__codelineno-1-9"></a><span class="k">await</span> <span class="n">repo</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">product</span><span class="o">.</span><span class="n">id</span><span class="p">,</span> <span class="p">{</span><span class="s2">"price"</span><span class="p">:</span> <span class="mf">8.99</span><span class="p">})</span>
|
||
<a id="__codelineno-1-10" name="__codelineno-1-10" href="#__codelineno-1-10"></a>
|
||
<a id="__codelineno-1-11" name="__codelineno-1-11" href="#__codelineno-1-11"></a><span class="c1"># Delete – cache entry removed</span>
|
||
<a id="__codelineno-1-12" name="__codelineno-1-12" href="#__codelineno-1-12"></a><span class="k">await</span> <span class="n">repo</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="n">product</span><span class="o">.</span><span class="n">id</span><span class="p">)</span>
|
||
<a id="__codelineno-1-13" name="__codelineno-1-13" href="#__codelineno-1-13"></a>
|
||
<a id="__codelineno-1-14" name="__codelineno-1-14" href="#__codelineno-1-14"></a><span class="c1"># Warm a set of IDs in advance (e.g., during a bulk load)</span>
|
||
<a id="__codelineno-1-15" name="__codelineno-1-15" href="#__codelineno-1-15"></a><span class="k">await</span> <span class="n">repo</span><span class="o">.</span><span class="n">warm_cache</span><span class="p">([</span><span class="n">ObjectId</span><span class="p">(</span><span class="s2">"..."</span><span class="p">),</span> <span class="n">ObjectId</span><span class="p">(</span><span class="s2">"..."</span><span class="p">)])</span>
|
||
</code></pre></div>
|
||
<hr />
|
||
<h2 id="4-redis-backend-optional">4️⃣ Redis Backend (optional)</h2>
|
||
<p>If you prefer a distributed cache, swap the backend:</p>
|
||
<div class="language-python highlight"><span class="filename">Python</span><pre><span></span><code><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a><span class="kn">from</span><span class="w"> </span><span class="nn">mongo_ops.cache</span><span class="w"> </span><span class="kn">import</span> <span class="n">RedisCacheBackend</span>
|
||
<a id="__codelineno-2-2" name="__codelineno-2-2" href="#__codelineno-2-2"></a><span class="kn">from</span><span class="w"> </span><span class="nn">redis.asyncio</span><span class="w"> </span><span class="kn">import</span> <span class="n">Redis</span>
|
||
<a id="__codelineno-2-3" name="__codelineno-2-3" href="#__codelineno-2-3"></a>
|
||
<a id="__codelineno-2-4" name="__codelineno-2-4" href="#__codelineno-2-4"></a><span class="n">redis_client</span> <span class="o">=</span> <span class="n">Redis</span><span class="p">(</span><span class="n">host</span><span class="o">=</span><span class="s2">"localhost"</span><span class="p">,</span> <span class="n">port</span><span class="o">=</span><span class="mi">6379</span><span class="p">)</span>
|
||
<a id="__codelineno-2-5" name="__codelineno-2-5" href="#__codelineno-2-5"></a><span class="n">redis_backend</span> <span class="o">=</span> <span class="n">RedisCacheBackend</span><span class="p">(</span><span class="n">redis_client</span><span class="p">,</span> <span class="n">key_prefix</span><span class="o">=</span><span class="s2">"prod:"</span><span class="p">)</span>
|
||
<a id="__codelineno-2-6" name="__codelineno-2-6" href="#__codelineno-2-6"></a><span class="n">ModelRegistry</span><span class="o">.</span><span class="n">set_cache_backend</span><span class="p">(</span><span class="n">redis_backend</span><span class="p">)</span>
|
||
</code></pre></div>
|
||
<p>The repository code stays the same – just pass the <code>redis_backend</code> instance to <code>CachedBaseRepository</code>.</p>
|
||
<hr />
|
||
<h2 id="5-when-to-use-caching">5️⃣ When to Use Caching</h2>
|
||
<ul>
|
||
<li>Frequently accessed documents (e.g., product details, configuration settings).</li>
|
||
<li>Low‑write‑to‑read ratios where cache invalidation cost is acceptable.</li>
|
||
<li>Distributed deployments where a shared Redis cache syncs invalidations via pub/sub.</li>
|
||
</ul>
|
||
<hr />
|
||
<h2 id="6-related-docs">6️⃣ Related Docs</h2>
|
||
<ul>
|
||
<li><strong>Core Components</strong> – see <code>docs/02_components.md</code> for the <code>CacheBackend</code> abstraction.</li>
|
||
<li><strong>Best Practices</strong> – remember to call <code>ModelRegistry.initialize_cache()</code> after DB connection.</li>
|
||
</ul>
|
||
<hr />
|
||
<p><em>Feel free to adapt the TTL, max entries, and backend to your workload.</em></p>
|
||
|
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|
||
|
||
|
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