[Sqlalchemy-commits] [1142] sqlalchemy/trunk/doc/build/content/datamapping.myt: formatting...

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<title>[1142] sqlalchemy/trunk/doc/build/content/datamapping.myt: formatting...</title>
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<dl>
<dt>Revision</dt> <dd>1142</dd>
<dt>Author</dt> <dd>zzzeek</dd>
<dt>Date</dt> <dd>2006-03-14 10:49:15 -0600 (Tue, 14 Mar 2006)</dd>
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<h3>Log Message</h3>
<pre>formatting...</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#sqlalchemytrunkdocbuildcontentdatamappingmyt">sqlalchemy/trunk/doc/build/content/datamapping.myt</a></li>
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<h3>Diff</h3>
<a id="sqlalchemytrunkdocbuildcontentdatamappingmyt"></a>
<div class="modfile"><h4>Modified: sqlalchemy/trunk/doc/build/content/datamapping.myt (1141 => 1142)</h4>
<pre class="diff"><span>
<span class="info">--- sqlalchemy/trunk/doc/build/content/datamapping.myt	2006-03-14 16:24:12 UTC (rev 1141)
+++ sqlalchemy/trunk/doc/build/content/datamapping.myt	2006-03-14 16:49:15 UTC (rev 1142)
</span><span class="lines">@@ -343,16 +343,16 @@
</span><span class="cx">             True
</span><span class="cx">         &lt;/&amp;&gt;
</span><span class="cx"> 
</span><del>-+&lt;p&gt;The backreference feature also works with many-to-many relationships, which are described later.  When creating a backreference, a corresponding property is placed on the child mapper.  The default arguments to this property can be overridden using the &lt;span class=&quot;codeline&quot;&gt;backref()&lt;/span&gt; function:
</del><ins>+&lt;p&gt;The backreference feature also works with many-to-many relationships, which are described later.  When creating a backreference, a corresponding property is placed on the child mapper.  The default arguments to this property can be overridden using the &lt;span class=&quot;codeline&quot;&gt;backref()&lt;/span&gt; function:
</ins><span class="cx">         &lt;&amp;|formatting.myt:code&amp;&gt;
</span><span class="cx">             Address.mapper = mapper(Address, addresses)
</span><span class="cx">             
</span><span class="cx">             User.mapper = mapper(User, users, properties = {
</span><del>-                                'addresses' : relation(Address.mapper, backref=backref('user', lazy=False, private=True))
</del><ins>+                                'addresses' : relation(Address.mapper, 
+                                    backref=backref('user', lazy=False, private=True))
</ins><span class="cx">                             }
</span><span class="cx">                           )
</span><span class="cx">                 &lt;/&amp;&gt;
</span><del>-&lt;p&gt;Note that when overriding a backreferenced property, we re-specify the backreference as well.  This will not override the existing 'addresses' property on the User class, but just sends a message to the attribute-management system that it should continue to maintain this backreference.&lt;/p&gt;
</del><span class="cx"> &lt;/&amp;&gt;
</span><span class="cx"> &lt;&amp;|doclib.myt:item, name=&quot;cascade&quot;, description=&quot;Creating Relationships Automatically with cascade_mappers&quot; &amp;&gt;
</span><span class="cx"> &lt;p&gt;The mapper package has a helper function &lt;span class=&quot;codeline&quot;&gt;cascade_mappers()&lt;/span&gt; which can simplify the task of linking several mappers together.  Given a list of classes and/or mappers, it identifies the foreign key relationships between the given mappers or corresponding class mappers, and creates relation() objects representing those relationships, including a backreference.  Attempts to find
</span></span></pre>
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