I want to build a search form as follows:

<form method="POST" tal:attributes="action
string:${request/base}issue">
   <p class="classblock"
      
tal:condition="python:request.user.hasPermission('View',
'issue')">
    <b>Search</b><br>
   <tal:block tal:replace="structure
python:request.indexargs_form()" />
   <input name="@search_text" size="10"
tal:attributes="value request/search_text">
   <input type="submit" value="Go">
   </p>
</form>

...but there's no way for me to tell indexargs_form to
stop generating @search_text.

As a result, if this form is displayed on the search
results page (I want it shown on every page ;-) You get
two @search_text fields which resutls in the following
error:

  File
"C:\PYTHON23\lib\site-packages\roundup\cgi\templating.py",
line 1879, in _post_init
    self.search_text = self.form[name].value
AttributeError: 'list' object has no attribute 'value'