https://community.appian.com/discussions/f/general/484/i-am-trying-to-configure-a-cdt-to-use-the-jpa-manytomany-annotation-i-have-twoI am trying to configure a CDT to use the JPA ManyToMany Annotation. I have two objects A &amp; B. Many A&#39;s can have many B&#39;s and many B&#39;s can have many A&#39;s. A has a primary key of id which is AutoGenerated, and a name field. B is setup the same way as Aen-USTelligent Community 12https://community.appian.com/thread/1458?ContentTypeID=1Tue, 05 Mar 2013 00:20:01 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:4b5fbe88-28bf-41e4-854e-f12f28ea666cbendGood advice Michael, it solved my issue. I also had to add nullable=true to the @JoinColumns to be able to add A and B records. Otherwise I received an error when inserting to the DB stating that I was missing the PK of the join table.<div style="clear:both;"></div>https://community.appian.com/thread/1457?ContentTypeID=1Mon, 04 Mar 2013 21:21:57 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:98ff98dc-85dd-49e4-a30c-69415b70c369Michael ChirlinHave you tried setting the cascade type to refresh?<br /><br />@ManyToMany(cascade={CascadeType.REFRESH}) <br /><div style="clear:both;"></div>https://community.appian.com/thread/1456?ContentTypeID=1Mon, 04 Mar 2013 18:54:15 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:8741ddc6-a3b3-43cc-95c3-e6f4f44f05c3bend...rds? I have read about using 2 OneToMany&#39;s with a JoinTable but I don&#39;t think this is supported by Appian JPA at this time. Any examples would be greatly appreciated. Thanks.<div style="clear:both;"></div>