[Zope] Help with DTML Forms

[J Cameron Cooper]

>
> I would like to create a DTML Form that may be called with or without 
> an argument (say, member_number).  I have tried something like this, a 
> DTML Form named AddAddressForm:
>  
> <dtml-var standard_arfs_header>
>  
> <dtml-form method=post action=AddAddress>
>   <table>
>   <dtml-unless member_number>
>     <tr>
>        <th>Member Number</th>
>        <td><input type=text name=member_number></td>
>     </tr>
>   </dtml-unless>
>   <tr>
>      <th>Address</th>
>      <th>City</th>
>   </tr>
>   <tr>
>         <td><input type=text name=address type=string></td>
>         <td><input type=text name=city type=string></td>
>   </tr>
>   <tr>
>         <td colspan=2><input type=submit></td>
>   </tr>
> </table>
> </dtml-form>
>  
> My intent is to have a form that, if called with no input paramters, 
> will display a field so I can enter the member_number.  If the form is 
> called with an input parameter, the member_number field will not be 
> displayed, but the passed in value will be passed on to the AddAddress 
> Method.
>  
> ...
>  
> Am I trying to do too much here?  I could make two forms, but I don't 
> like the idea of maintaining two nearly identical forms.  Can this be 
> done?

Try this...

<dtml-form method="post" action="AddAddress">
  <table>

  <dtml-if member_number>
    <input type="hidden" name="member_number" 
value="&dtml-member_number;" />
  <dtml-else>
    <tr>
       <th>Member Number</th>
       <td><input type=text name=member_number></td>
    </tr>
  </dtml-if>

  <tr>
     <th>Address</th>
     <th>City</th>
  </tr>
  <tr>
        <td><input type=text name=address type=string></td>
        <td><input type=text name=city type=string></td>
  </tr>
  <tr>
        <td colspan=2><input type=submit></td>
  </tr>
</table>
</dtml-form>

I haven't done DTML in a while, so you may need to fix my if/else. If 
the entity syntax won't work for you (and I don't know why it wouldn't), 
you can use the normal form.

The hidden field trick is great for sequential pages.

             --jcc
       (better late than never)