Displaying username and realname in the HTML pages

Hello,

the username in our use case is the AD login name and cryptic. I would like to 
display the combination of username (realname), preferably sorted by realname 
in the different HTML pages. 

For page "issue.item.html" I changed 

  <td tal:content="structure context/assignedto/menu">assignedto menu</td>

to 

  <td tal:content="structure 
python:context.assignedto.menu(additional=['realname',])">assignedto menu</td>

and get a menue with a list of "username (Lastname, Firstname)". 
Unfortunately, it is not sorted on last name and firstname. 

For page "issue.index.html" I don't know what I could do to get the 
equivalent.

   <td tal:condition="request/show/assignedto"
       tal:content="python:i.assignedto.plain() or default">&nbsp;</td>

I can exchange "plain()" by "realname" and I get the realname part of the user 
but I don't know how to get both.

In a previous communication on the mailing list I saw it was mentioned that 
there is a documentation on the API but I don't know where to find it. Could 
you please point me to it? 

Your help is very much appreciated.

Andreas


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