Use default values for primitive attributes when Graph properties are unset.

[fnordian]

I am upgrading my existing application to sdn6. There's a boolean field in my entities that is not set for some of the nodes.

Reading those nodes fails with NullPointerException when unboxing null to boolean.

I tried to trace that problem and to me it seems that DefaultNeo4jConversionService has extra handling for null-values (valueIsLiteralNullOrNullValue) and that causes that no converters are called.

So the case cannot be caught through a custom converter. Is there another way to handle null-values gracefully?

This problem did not exist with OGM

[michael-simons]

Are you happen to have these properties defined as constructor parameters? Than this behavior is expected.

It used to be a mapping exception but that prevents Kotlins explicit defaults from working:

871d586

Non constructor properties should work.
If not I take care next week. Also for your other issues. Thanks for reporting them. 👍

[michael-simons]

That has been actually more tricky than I thought, as we also want to support Kotlin default values (non JVM defaults, but explicit ones). But things should work now. Thanks again for the report.