Hi All,
I am getting the following exception when i try to save my object.
java.lang.NullPointerException
at
com.webobjects.eoaccess.EODatabaseContext.recordChangesInEditingContext(EODatabaseContext.java:6099)
at
com.webobjects.eocontrol.EOObjectStoreCoordinator.saveChangesInEditingContext(EOObjectStoreCoordinator.java:412)
at
com.webobjects.eocontrol.EOEditingContext.saveChanges(EOEditingContext.java:3165)
Lets say i have an object A which has to-one relationship to B and
many-many relationship to C.
now in the EOModeler i created a D entity which acts like a join table
between A and C since the relationship between A and C is many - many.so
this is wat it looks in the EOModel
1 * * 1
A -------------> D --------------> C
but i didn't set the to-many relationship from A ---->D as a instance
property instead i have flattened the relationship so that i can access
C directly from A using A.flattenedRelationship , I made this flattened
relationship as a class property.
Now coming back to the problem, once the relationship is established
from A--> C if i try to change the relationship from A-->B its throwing
the above exception.
if i remove the relationship from A---> D and then try to establish the
relationship between A ---> B then i am not getting any error .
if i establish relationship from A---> B and then establish relationship
form A-->C then also i am getting any exception only when i establish
relationship from A-->C first n then A---> B i am getting the exception.
NOTE : B and C also have relationship in between them. following are the
relationships
A to-many B
A many to many C
B to-many C
OR
1 *
A----------------> B
* *
A---------------->C
1 *
B---------------->C
Any clues why i am getting the exception for the flow mentioned.
Thanks in Advance
Regards,
--Sri
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