title: Propel: many-to-many relationship without crosstable
body: <p>I have recently got an assignment from my school, where I have to create a Propel Schema for ORM.
  This isn't really a Problem, but one of the requirements is to connect two of those tables with a many-to-many relationship.</p>
  
  <p>Normally, you would do that with a crosstable (holding the attributes from both tables), but our teacher said that this is also possible WITHOUT such a crosstable (and even is a requirement).</p>
  
  <p>How would one go into creating such in Propel?</p>
  
  <p>The ERD in Question:</p>
  
  <p><a href="http://files.f-o-g.eu/b8f8a9" rel="nofollow">http://files.f-o-g.eu/b8f8a9</a></p>
  
  <p>(I am stuck at VIP &lt;-> Einladung)</p>
  
  <p>So far I have this:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;database name="orm1" defaultIdMethod="native"&gt;
      &lt;table name="einladung" phpName="Einladung"&gt;
              &lt;column name="nummer" type="INTEGER" primaryKey="true" autoIncrement="true" /&gt;
              &lt;column name="fbuffet" type="BOOLEAN" /&gt;
              &lt;column name="splatz" type="INTEGER" /&gt;
      &lt;/table&gt;
      &lt;table name="sorganisation" phpName="SpendenOrganisation"&gt;
              &lt;column name="name" type="VARCHAR" size="255" primaryKey="true" required="true" /&gt;
              &lt;column name="adresse" type="VARCHAR" size="255" /&gt;
      &lt;/table&gt;
      &lt;table name="wveranstaltung" phpName="WVeranstaltung"&gt;
              &lt;column name="titel" type="VARCHAR" size="255" primaryKey="true" required="true" /&gt;
              &lt;column name="datum" type="DATE" required="true" /&gt;
              &lt;column name="ort" type="VARCHAR" size="255"/&gt;
  
      &lt;/table&gt;
      &lt;table name="vip" phpName="Vip"&gt;
              &lt;column name="id" type="INTEGER" primaryKey="true" autoIncrement="true" /&gt;
              &lt;column name="vname" type="VARCHAR" size="255" required="true" /&gt;
              &lt;column name="nname" type="VARCHAR" size="255" required="true" /&gt;
      &lt;/table&gt;
  &lt;/database&gt;
  </code></pre>
  
  <p>Anyone got a clue?</p>