In XDocReport, how to handle null value? -

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is there way handle null value field in xdocreport? or need manipulate on own? example: 

if (thisvar == null)   context.put("sampletext", ""); else   context.put("sampletext", thisvar);

or there option in docx quick parts?

i found line in error message of xdocreport. not understand apply this, in template or in code.

tip: if failing expression known legally refer that's null or missing, either specify default value myoptionalvar!mydefault, or use [#if myoptionalvar??]when-present[#else]when-missing[/#if]. (these cover last step of expression; cover whole expression, use parenthesis: (myoptionalvar.foo)!mydefault, (myoptionalvar.foo)??

in docx, append ?if_exists field name

«${tx.amount?if_exists}»

you may append !

«${tx.amount!}»

please refer link uses freemarker. how check if variable exists in freemarker template?


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