Liferay Data Linear Lists

I am using liferay (6.1) to create my portlets and I am currently using dynamic data lists to define data definitions.

Can I add new data definition fields ?

Instead of a calendar date, I want to add hours, minutes and seconds in the format hh:mm:ss

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I don't think there is an easy way to extend the available DDL field types.

DDL field types are hardcoded in code (look at com.liferay.portlet.dynamicdatamapping.storage.FieldConstants), so you need to use the ext-plugin to modify it; Also, the JSPs are a bit hairy.



So, while this is possible, I would expect the task to be quite difficult.

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