[jboss-user] [EJB3] - Re: EntityManager.find returns null.

[Wolfgang Knauf]

Wolfgang Knauf [http://community.jboss.org/people/WolfgangKnauf] created the discussion

"Re: EntityManager.find returns null."

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Hi,

you might fill your "ID" with spaces before putting it in "find" ;-).

Do you have control over the oracle, or is it a predefined schema? If you can control it: 
a) did you declare a type-mapping in your "....-ds.xml",  e.g. something like this?
      <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) -->
      <metadata>
         <type-mapping>Oracle9i</type-mapping>
      </metadata>
In "\server\default\conf\standardjbosscmp-jdbc.xml, the java type "String" is mapped to "VARCHAR(255)" for "Oracle9i".

b) in "persistence.xml", you can set a property "hibernate.dialect":
 http://docs.jboss.org/hibernate/core/3.3/reference/en/html/session-configuration.html#configuration-optional-dialects http://docs.jboss.org/hibernate/core/3.3/reference/en/html/session-configuration.html#configuration-optional-dialects

Hope this helps

Wolfgang
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