<table:column> Roo-tag for property of referenced entity

I've got a two classes (pupil, class) in a Roo-project and their scaffolded views.

pupil and class have a 1:1 relationship

In the list.jspx of pupil I'd like to display a column for a property of class.

I don't know the correct attributes to give to the table:column-tag. This following example gives the error:

SpelEvaluationException: EL1027Epos 4): Indexing into type 'com.pupil' is not supported

<table:table data="${pupil}" duplicate="true" id="l_com_pupil" path="/admin/pupil" z="user-managed">
   <table:column id="c_com_pupil_pupilName" property="pupilName" z="user-managed"/>
   <!-- I'd like to display the attribute teacher_name of the class 'class' here but it doesn't work -->
   <table:column id="c_com_pupil_class_teacherName" property="teacherName"  z="user-managed"/>
</table:table>

Solution

This is how I did it, not for listing, but rather for showing the name of the teacher when you view the pupil entity:

Edit the controller and specifically the method show (in the java file, not in the aj file, of course).
Add an attribute to your UI Model, for instance "teacherName" (use Model.addAttribute), where you populate the teacherName with the desired name.
Add in the show.jspx file something like:

<div><label for="_pupilTeacher">Teacher Name:</label><div class="box">${teacherName}</div></div><br/>

(alternatively, you could create a new tagx file with your own parameters)

Hope it helped.

Radu