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GMF Databaseconnection Issue [message #684427]

Wed, 15 June 2011 10:54

Eclipse User

Hi,

i want to store/load all GMF-diagram and modelcontent into a postgressql-database.

To learn how it could be done, i`m trying the hibernate/teneo/gmf-example (mindmap) with changes to use postgres-DB.

I´m able to store and load the node-element ("Topic"). At this point i`m able to close and reopen editor without failure.
When i connect two nodes with a connection-element ("Subtopic"), safe, close and reopen the editor, the editor remains "dirty".
Trying to safe in this state causes

"Save Failed
object references an unsaved transient instance - save the transient instance before flushing: Edge"

"org.hibernate.ObjectDeletedException: deleted object would be re-saved by cascade (remove deleted object from associations)"

I read a lot and tried a lot of different settings in hibernate.hbm.xml especially different cascade-settings but nothing works.

Maybe someone knows the answer.

With kind regards

Re: GMF Databaseconnection Issue [message #684450 is a reply to message #684427]

Wed, 15 June 2011 11:31

Eclipse User

Hello,

I don´t really know the answer but I´m having the exactly same issue.

Somehow I think that this is a Reference Based Links specific issue.

When you do this:

Quote:

When i connect two nodes with a connection-element ("Subtopic"), safe, close and reopen the editor, the editor remains "dirty".
Trying to safe in this state causes

Are you able to delete the subtopic link?

Best Regards,
João

Re: GMF Databaseconnection Issue [message #684749 is a reply to message #684450]

Thu, 16 June 2011 03:09

Eclipse User

Hello João,

>> Are you able to delete the subtopic link? <<

No, i`m not. It`s possible to delete the link from diagram but trying to save this causes the same error message/exception as described above.

I`m glad i`m not the only one with this issue Smile

with kind regards

Andreas

Re: GMF Databaseconnection Issue [message #686465 is a reply to message #684749]

Wed, 22 June 2011 05:32

Eclipse User

I solved this issue.

that`s my way:
1. I stripped down the mindmap.ecore to the basic elements(see ecore file attatched)
2. I changed properties of the "target"-association (Relationship-Topic)
Derived == true
3. StoreController was changed from "localDataStore.setProperties(props);" to
"localDataStore.setDataStoreProperties(props);"

Honestly, i`m not sure what exactly solved the issue. My favourites are Point 1 and 2 Smile

with kind regards

Andreas

Attachment: mindmap.ecore
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