Hi Michael
Thanks for the help. Next question. I have a one to many Partner ->
Customer relationship defined.
When creating a new customer, I try to setup the relationship as follows:
partner.addToCustomers(customer);
customer.setPartner(partner);
I get a NullPointer, even though customer and partner are not null.
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
at
org.apache.cayenne.CayenneDataObject.setReverseRelationship(CayenneDataObject.java:385)
at
org.apache.cayenne.CayenneDataObject.setToOneTarget(CayenneDataObject.java:339)
at com.stimulus.support.auto._Customer.setPartner(_Customer.java:97)
at
org.apache.jsp.customerdetail_jsp._jspService(customerdetail_jsp.java:94)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.cayenne.conf.WebApplicationContextFilter.doFilter(WebApplicationContextFilter.java:91)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.securityfilter.filter.SecurityFilter.doFilter(SecurityFilter.java:188)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:619)
Any ideas?
Jamie
Michael Gentry wrote:
When you create a brand new ObjEntity from a DBEntity, it propagates
all attributes and relationships defined in the DBEntity except for
the primary key (Cayenne Modeler assumes you don't need that exposed).
Once you've created the ObjEntity, though, adding a new relationship
to the DBEntity will not be automatically synced to the ObjEntity.
You have to sync it manually (click the double-arrow icon in either
the DBEntity or ObjEntity toolbar or use the Project menu or keyboard
shortcut). I'm talking mainly about 3.0M6 since I no longer use the
2.x modeler and don't remember the exact specifics of how it behaves.
mrg
On Thu, Sep 17, 2009 at 3:46 AM, Jamie <[email protected]> wrote:
Hi Everyone
I am really struggling to use the Cayenne Modelling tool. It seems whenever
I create an ObjectEntity from the DBEntity the relationships are not always
propagated. This happens even when I follow the ARTIST tutorial. I tried
both Cayenne 3.0M6 and Cayenne 2.0.4 and the same behaviour is observed. Is
this a known bug or am I likely doing something horribly wrong?
Thank in advance
Jamie
