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PONHibernate Bag Mapping
 

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    <p>I need a hand mapping a collection.</p> <p>I am using a join table to hold references to rooms ids and calEvent Ids. However, the look ups will mainly be based on the room's <code>buildingID</code> - so I'd like to add <code>buildingID</code> to the following mapping. Does anyone know how to do so?</p> <p>I've looked through the NHibernate docs but can't find anything.</p> <pre><code>&lt;bag name="rooms" table="tb_calEvent_rooms" lazy="false"&gt; &lt;key column="calEventID"/&gt; &lt;many-to-many class="BasicRoom" column="roomID"/&gt; &lt;/bag&gt; </code></pre> <p>Class:</p> <pre><code>public class BasicRoom { private long _id; private long _buildingID; private string _roomName; </code></pre> <p>Any hints/help much appreciated.</p> <p><strong>Reasoning:</strong></p> <p>A room will never change building so if I add buildingID to the join table; I will reduce the complexity of the select statement from something like -</p> <pre><code>SELECT * FROM dbo.tb_calEvent_rooms INNER JOIN dbo.tb_calEvents ON (dbo.tb_calEvent_rooms.calEventID = dbo.tb_calEvents.id) INNER JOIN dbo.tb_rooms ON (dbo.tb_calEvent_rooms.roomID = dbo.tb_rooms.id) INNER JOIN dbo.tb_buildings ON (dbo.tb_rooms.buildingID = dbo.tb_buildings.id) WHERE dbo.tb_buildings.id = 54 </code></pre> <p>To</p> <pre><code>SELECT * FROM dbo.tb_calEvents INNER JOIN dbo.tb_calEvent_rooms ON (dbo.tb_calEvents.id = dbo.tb_calEvent_rooms.calEventID), dbo.tb_buildings WHERE dbo.tb_buildings.id = 54 </code></pre> <p>Is my reasoning correct?</p>
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