JDeveloper and ADF


entity usage association


hello im using jdev 11.1.1.9.0i have created a Vo from Entities "Document,UserGroup and Tuser" but i got this error in the xml code:how can i add the code of "association'' ,this is my BC:
Can you navigate to the "Entity Objects" tab and ensure that the entity objects are all related through an association. Normally, if DB has foreign key relationships defined, they are pulled automatically to entity layer as associations - I guess maybe in your case DB foreign keys were missing and hence associations were not created automatically. 
but here in my case there is no association between "document" and "userGroup", but in contrast there is the "Tuser" between them.
That being the case, there should atleast be an association defined between the entities TUser & UserGroup and this association should be linking the two entities in the view object.

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