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hello all!
I tried running the sample GWT/Google Appengine application - expenses
generated by ROO using the roo command "script expenses.roo" (as
advised here)...
This app uses datanucleus-core - 1.1.6 and a HSQLDB as the in-memory
database.
I was able to run the application and successfully store and retrieve
Employee objects. (These Employee objects do not have any date type
fields but have only string and int fields).
But I am having problems storing the 'Report' objects with the App
printing an error message 'Unexpected Server Error'. Looking at the
logs and debugging, this unexpected error happened because of trying
to store null in a not null date type field ('created' date field)
This is where it gets complicated... Looking at the source code for
this Report class, the 'created' date field is not specified as a 'not
null' field (missing the @notnull annotation). To confirm this I
changed the databse to Postgresql and inspected the auto-generated
schema and found that this date field is indeed marked as 'not null'.
This means that DataNucleus during auto-schema generation always marks
date fields as 'not null'.
I further confirmed this by changing the ORM library to Hibernate and
the same code worked with out any problems and was able to save report
objects with date fields in both HSQL and Postgres DB.
Is it a bug with the DataNucleus and is anyone else seeing this
problem?
I am lost...
Thanks in advacne.
Deepak
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