Question

I am using grails and I have this Jasper report with a subreport in it.
Having this simple two jasper reports

Note: Only .jrxml is the file extension of the files inside the /web-app/reports

Main Report [main_report][subreport area]

<subreport>
   <reportElement x="0" y="0" width="555" height="157"/>
   <subreportExpression>
      <![CDATA[$P{SUBREPORT_DIR} + "test_report.jasper"]]>
   </subreportExpression>
</subreport>

Test report [test_report][title.band]

<staticText>
   <reportElement x="203" y="30" width="154" height="34"/>
   <textElement/>
   <text><![CDATA[Hello World]]></text>
</staticText>

And looking in the view or the gsp file I have this command

<g:jasperReport jasper="main_report"
                format="pdf, html"
                delimiter=" "/>

When I want to view the report in either PDF of HTML format, the report returns a blank page. Am I missing something to display the main_report properly with a subreport test_report.

Answer 1

You need to:

1. Make sure the sub-report is compiled (do this in iReport), i.e. there should be a .jasper file for sub report in reports dir.
2. Set the SUBREPORT_DIR parameter before generating the report, e.g.

params.SUBREPORT_DIR = servletContext.getRealPath('/reports') + "/"

(assuming the compiled subreport is in the <app>/web-app/reports directory, the same as the uncompiled reports).