[FLOW3-general] Error: Column identifier is not unique

[Michael Sauter]

Hi,

I have a similar setup to the blog example: A "parent" model (like the 
blog model) and a "child" model (like the post model). The children are 
stored in a SplObjectStorage in the parent, and every child holds a 
reference to its parent. The only difference that I can see at the 
moment is that my parent model is an aggregate root (there is no 
repository to get the child models). Parent and child are edited in two 
separate controllers: ParentController (which is basic CRUD) and 
ChildController (basic CRUD as well, but all actions get a parent object 
as an argument). In order to update the children of a given parent, I 
call an updateChild() method in the parent which "exchanges" the 
original child with the edited one (by getting the identifier from the 
persistence manager for both original and edited object).

Now, I can created and edit parent objects without problems as long as I 
don't add any children. Once a child is added, I get the following error 
upon editing the parent (editing the child works fine):

#23000: SQLSTATE[23000]: Integrity constraint violation: 19 column 
identifier is not unique  (More information)

PDOException thrown in file
Packages/Framework/FLOW3/Classes/Persistence/Backend/PdoBackend.php in 
line 178.

Any ideas what I'm doing wrong here? (Or could this be a bug?)

Thanks,
Michael