Can you annotate to not save field if it is null?

[Tony Park]

Is there a way to annotate a field so that it will not be saved in Datastore if the value is null?

Be default, a field is saved (serialized) if it is null and appears as "null" in the Datastore explorer in the web browser.

I tried using Jackson like this but it didn't work:

@JsonInclude(Include.NON_NULL)

private String text;

[Jeff Schnitzer]

Are you looking for this?

@IgnoreSave(IfNull.com)

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[Jeff Schnitzer]

Sorry I'm on my phone. That's IfNull.class

[Tony Park]

That looks like it should work. I see there are many other useful conditions to pass in as well. Thank you.

[Tony Park]

It looks like you can't put @IgnoreSave(IfNull.class) at the top of the class to apply to all the fields in a class. It is only possible to put it on one field at a time. That's fine but it would be less cluttered to have a one liner.

Would it be possible to make @IgnoreSave(IfNull.class) apply to @Target({ElementType.TYPE, ElementType.FIELD})?

[Jeff Schnitzer]

You aren't wrong. Can you add this as a feature request in the github issues?

Jeff

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