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<h1 id="mongo-ops-async-mongodb-operations-layer-for-fastapi">🧩 mongo-ops — Async MongoDB Operations Layer for FastAPI</h1>
<p><code>mongo-ops</code> is a modular, high-performance MongoDB operations library for FastAPI microservices. It standardizes connection lifecycle, Pydantic v2 document models, and repository-style async CRUD — with added layers for caching, reference population, and multi-document transactions. It is built on top of Motor.</p>
<blockquote>
<p><strong>Doc model:</strong> this wiki is written for humans — howto guides, examples, and testing recipes. The authoritative API contracts live in the code (docstrings) and the machinereadable bundle under <code>docs/mcp/</code>.</p>
</blockquote>
<hr />
<h2 id="key-features">🚀 Key Features</h2>
<ul>
<li>🧱 Unified repository pattern — <code>BaseRepository</code> with generic CRUD</li>
<li>⚡ Fully asynchronous (Motor-based)</li>
<li>🧬 Pydantic v2 data models with autotimestamps (<code>BaseDocument</code>)</li>
<li>🔒 Model registry for multi-collection startup (<code>ModelRegistry</code>)</li>
<li>🗄️ ID-based caching — in-memory or Redis (<code>cache/</code>)</li>
<li>🔗 Reference population with cycle detection (<code>populate/</code>)</li>
<li>🔁 Transaction and session helpers (<code>transactions/</code>)</li>
<li>🧪 Mock-friendly architecture — the whole repo test suite runs without MongoDB</li>
</ul>
<hr />
<h2 id="installation">📦 Installation</h2>
<p>From your internal PyPI:</p>
<div class="language-bash highlight"><span class="filename">Bash</span><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a>pip<span class="w"> </span>install<span class="w"> </span>--extra-index-url<span class="w"> </span>https://<span class="nv">$PYPI_USERNAME</span>:<span class="nv">$PYPI_PASSWORD</span>@pip.aetoskia.com/simple<span class="w"> </span>mongo-ops
</code></pre></div>
<p>With the extra batteries your workload needs:</p>
<div class="language-bash highlight"><span class="filename">Bash</span><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a>pip<span class="w"> </span>install<span class="w"> </span>--extra-index-url<span class="w"> </span>https://<span class="nv">$PYPI_USERNAME</span>:<span class="nv">$PYPI_PASSWORD</span>@pip.aetoskia.com/simple<span class="w"> </span><span class="s2">&quot;mongo-ops[redis]&quot;</span><span class="w"> </span><span class="c1"># Redis cache backend</span>
<a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a>pip<span class="w"> </span>install<span class="w"> </span>--extra-index-url<span class="w"> </span>https://<span class="nv">$PYPI_USERNAME</span>:<span class="nv">$PYPI_PASSWORD</span>@pip.aetoskia.com/simple<span class="w"> </span><span class="s2">&quot;mongo-ops[all]&quot;</span><span class="w"> </span><span class="c1"># dev, redis, beanie, fastapi</span>
</code></pre></div>
<p>From local source:</p>
<div class="language-bash highlight"><span class="filename">Bash</span><pre><span></span><code><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a>pip<span class="w"> </span>install<span class="w"> </span>-e<span class="w"> </span>.
</code></pre></div>
<hr />
<h2 id="documentation-structure">📁 Documentation Structure</h2>
<table>
<thead>
<tr>
<th>Section</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="01_overview/">Overview</a></td>
<td>Architecture, lifecycle, and repository decision table</td>
</tr>
<tr>
<td><a href="02_components/">Core Components</a></td>
<td>Validated reference for the public API surface</td>
</tr>
<tr>
<td><strong>Use cases</strong></td>
<td>Step-by-step recipes, grouped by theme</td>
</tr>
<tr>
<td><strong>· Getting Started</strong></td>
<td></td>
</tr>
<tr>
<td>· <a href="03_use_cases/01_basic_crud/">01 Basic CRUD API</a></td>
<td>FastAPI user management app</td>
</tr>
<tr>
<td>· <a href="03_use_cases/02_custom_repo/">02 Custom repository</a></td>
<td>Product catalog with business logic</td>
</tr>
<tr>
<td>· <a href="03_use_cases/06_multi_model/">06 Multi-model</a></td>
<td>One service, many collections</td>
</tr>
<tr>
<td><strong>· Transactions</strong></td>
<td></td>
</tr>
<tr>
<td>· <a href="03_use_cases/03_transactions/">03 Transactions</a></td>
<td>Atomic order + inventory updates</td>
</tr>
<tr>
<td>· <a href="03_use_cases/12_transaction_helper/">12 Transaction helper</a></td>
<td><code>execute_transaction</code></td>
</tr>
<tr>
<td><strong>· Data &amp; Queries</strong></td>
<td></td>
</tr>
<tr>
<td>· <a href="03_use_cases/04_pagination/">04 Pagination</a></td>
<td>Filtering, sorting, page metadata</td>
</tr>
<tr>
<td>· <a href="03_use_cases/05_soft_deletes/">05 Soft deletes</a></td>
<td>Recoverable delete pattern</td>
</tr>
<tr>
<td>· <a href="03_use_cases/13_index_creation/">13 Indexes</a></td>
<td>Single, compound, and optioned indexes</td>
</tr>
<tr>
<td><strong>· Caching</strong></td>
<td></td>
</tr>
<tr>
<td>· <a href="03_use_cases/07_caching/">07 Caching</a></td>
<td>In-memory / Redis read cache</td>
</tr>
<tr>
<td>· <a href="03_use_cases/10_cache_and_population/">10 Cache + population</a></td>
<td>Reading through cache, populating on hit</td>
</tr>
<tr>
<td>· <a href="03_use_cases/11_cache_lifecycle/">11 Cache lifecycle</a></td>
<td>Startup/shutdown hygiene</td>
</tr>
<tr>
<td>· <a href="03_use_cases/16_cached_repository_intricacies/">16 Cached repository intricacies</a></td>
<td>What's stored, JSON round-trip, typed-FK trap</td>
</tr>
<tr>
<td><strong>· Population</strong></td>
<td></td>
</tr>
<tr>
<td>· <a href="03_use_cases/08_population/">08 Population</a></td>
<td>Resolve references on read</td>
</tr>
<tr>
<td>· <a href="03_use_cases/09_advanced_population/">09 Advanced population</a></td>
<td>Nested + circular references</td>
</tr>
<tr>
<td>· <a href="03_use_cases/15_populating_repository_wiring/">15 PopulatingRepository internals</a></td>
<td>Object ⇄ ObjectId write/read lifecycle, wiring</td>
</tr>
<tr>
<td>· <a href="03_use_cases/17_populate_depopulate_examples/">17 Populate &amp; depopulate examples</a></td>
<td>Worked shapes for depopulate/populate + cached round trip</td>
</tr>
<tr>
<td><strong>· Testing</strong></td>
<td></td>
</tr>
<tr>
<td>· <a href="03_use_cases/14_testing_guide/">14 Testing guide</a></td>
<td>Mock Motor, engine, cache, transactions</td>
</tr>
<tr>
<td><a href="04_best_practices/">Best Practices</a></td>
<td>Layering, lifecycle, and gotchas</td>
</tr>
<tr>
<td><a href="05_patterns/">Common Patterns</a></td>
<td>Service layer, aggregation, bulk ops</td>
</tr>
<tr>
<td><a href="06_error_handling/">Error Handling</a></td>
<td>Library exceptions and FastAPI mapping</td>
</tr>
<tr>
<td><a href="07_testing_example/">Testing Example</a></td>
<td>Mock-based quickstart</td>
</tr>
</tbody>
</table>
<hr />
<h2 id="related-resources">🔗 Related Resources</h2>
<ul>
<li><strong>Source Code:</strong> <a href="https://git.aetoskia.com/aetos/mongo-ops">Gitea Repository</a></li>
<li><strong>Internal PyPI:</strong> <a href="https://pip.aetoskia.com/simple/mongo-ops">pip.aetoskia.com/simple/mongo-ops</a></li>
<li><strong>Drone CI:</strong> Auto-builds and publishes tagged releases, gated on black / ruff / mypy / pytest.</li>
</ul>
<hr />
<p>© Aetoskia Internal — <code>mongo-ops</code> 0.1.5</p>
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