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SQLAlchemy 1.2 Documentation
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Release: <span class="version-num">1.2.19</span>
| Release Date: April 15, 2019
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<h1>SQLAlchemy 1.2 Documentation</h1>
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<h3><a href="../index.html">SQLAlchemy 1.2 Documentation</a></h3>
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<a href="index.html" title="SQLAlchemy ORM">SQLAlchemy ORM</a>
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<ul>
<li><span class="link-container"><a class="reference external" href="tutorial.html">Object Relational Tutorial</a></span></li>
<li><span class="link-container"><a class="reference external" href="mapper_config.html">Mapper Configuration</a></span></li>
<li><span class="link-container"><a class="reference external" href="relationships.html">Relationship Configuration</a></span></li>
<li class="selected"><span class="link-container"><strong>Loading Objects</strong><a class="paramlink headerlink reference internal" href="#">¶</a></span><ul>
<li><span class="link-container"><a class="reference external" href="loading_columns.html">Loading Columns</a></span></li>
<li><span class="link-container"><a class="reference external" href="loading_relationships.html">Relationship Loading Techniques</a></span></li>
<li><span class="link-container"><a class="reference external" href="inheritance_loading.html">Loading Inheritance Hierarchies</a></span></li>
<li><span class="link-container"><a class="reference external" href="constructors.html">Constructors and Object Initialization</a></span></li>
<li><span class="link-container"><a class="reference external" href="query.html">Query API</a></span></li>
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<li><span class="link-container"><a class="reference external" href="session.html">Using the Session</a></span></li>
<li><span class="link-container"><a class="reference external" href="extending.html">Events and Internals</a></span></li>
<li><span class="link-container"><a class="reference external" href="extensions/index.html">ORM Extensions</a></span></li>
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<h1>Loading Objects<a class="headerlink" href="#loading-objects" title="Permalink to this headline">¶</a></h1>
<p>Notes and features regarding the general loading of mapped objects.</p>
<p>For an in-depth introduction to querying with the SQLAlchemy ORM, please see the <a class="reference internal" href="tutorial.html"><span class="std std-ref">Object Relational Tutorial</span></a>.</p>
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<li class="toctree-l1"><a class="reference internal" href="loading_columns.html">Loading Columns</a><ul>
<li class="toctree-l2"><a class="reference internal" href="loading_columns.html#deferred-column-loading">Deferred Column Loading</a></li>
<li class="toctree-l2"><a class="reference internal" href="loading_columns.html#column-bundles">Column Bundles</a></li>
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<li class="toctree-l1"><a class="reference internal" href="loading_relationships.html">Relationship Loading Techniques</a><ul>
<li class="toctree-l2"><a class="reference internal" href="loading_relationships.html#configuring-loader-strategies-at-mapping-time">Configuring Loader Strategies at Mapping Time</a></li>
<li class="toctree-l2"><a class="reference internal" href="loading_relationships.html#controlling-loading-via-options">Controlling Loading via Options</a></li>
<li class="toctree-l2"><a class="reference internal" href="loading_relationships.html#lazy-loading">Lazy Loading</a></li>
<li class="toctree-l2"><a class="reference internal" href="loading_relationships.html#joined-eager-loading">Joined Eager Loading</a></li>
<li class="toctree-l2"><a class="reference internal" href="loading_relationships.html#subquery-eager-loading">Subquery Eager Loading</a></li>
<li class="toctree-l2"><a class="reference internal" href="loading_relationships.html#select-in-loading">Select IN loading</a></li>
<li class="toctree-l2"><a class="reference internal" href="loading_relationships.html#what-kind-of-loading-to-use">What Kind of Loading to Use ?</a></li>
<li class="toctree-l2"><a class="reference internal" href="loading_relationships.html#polymorphic-eager-loading">Polymorphic Eager Loading</a></li>
<li class="toctree-l2"><a class="reference internal" href="loading_relationships.html#wildcard-loading-strategies">Wildcard Loading Strategies</a></li>
<li class="toctree-l2"><a class="reference internal" href="loading_relationships.html#routing-explicit-joins-statements-into-eagerly-loaded-collections">Routing Explicit Joins/Statements into Eagerly Loaded Collections</a></li>
<li class="toctree-l2"><a class="reference internal" href="loading_relationships.html#creating-custom-load-rules">Creating Custom Load Rules</a></li>
<li class="toctree-l2"><a class="reference internal" href="loading_relationships.html#relationship-loader-api">Relationship Loader API</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="inheritance_loading.html">Loading Inheritance Hierarchies</a><ul>
<li class="toctree-l2"><a class="reference internal" href="inheritance_loading.html#using-with-polymorphic">Using with_polymorphic</a></li>
<li class="toctree-l2"><a class="reference internal" href="inheritance_loading.html#polymorphic-selectin-loading">Polymorphic Selectin Loading</a></li>
<li class="toctree-l2"><a class="reference internal" href="inheritance_loading.html#referring-to-specific-subtypes-on-relationships">Referring to specific subtypes on relationships</a></li>
<li class="toctree-l2"><a class="reference internal" href="inheritance_loading.html#loading-objects-with-joined-table-inheritance">Loading objects with joined table inheritance</a></li>
<li class="toctree-l2"><a class="reference internal" href="inheritance_loading.html#loading-objects-with-single-table-inheritance">Loading objects with single table inheritance</a></li>
<li class="toctree-l2"><a class="reference internal" href="inheritance_loading.html#inheritance-loading-api">Inheritance Loading API</a></li>
</ul>
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<li class="toctree-l1"><a class="reference internal" href="constructors.html">Constructors and Object Initialization</a></li>
<li class="toctree-l1"><a class="reference internal" href="query.html">Query API</a><ul>
<li class="toctree-l2"><a class="reference internal" href="query.html#the-query-object">The Query Object</a></li>
<li class="toctree-l2"><a class="reference internal" href="query.html#orm-specific-query-constructs">ORM-Specific Query Constructs</a></li>
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