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GMF Databaseconnection Issue [message #684427]

Wed, 15 June 2011 14:54

Andreas

Messages: 19
Registered: October 2009

Junior Member

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

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

Wed, 15 June 2011 15:31

Joao S

Messages: 51
Registered: January 2011

Member

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

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

Thu, 16 June 2011 07:09

Andreas

Messages: 19
Registered: October 2009

Junior Member

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

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

Wed, 22 June 2011 09:32

Andreas

Messages: 19
Registered: October 2009

Junior Member

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

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