[Zope] Selecting an option in a drop-down list in DTML

[hans]

Richard McKinley wrote:

> Hi,
>
> I have a drop-down list which is dynamically populated from a database
> lookup table using the <dtml-in> structure to iterate through the list of
> rows and add an <OPTION> to the drop-down for each row in the table.
>
> like so:
>
> <select name="Purpose">
>   <dtml-in sqlLookupResearchPurpose>
>
>     <option value="<dtml-var "RESEARCH_PURPOSE">"> <dtml-       var
> "RESEARCH_PURPOSE"> </option>
>
>   </dtml-in>
> </select>
>
> I want to be able to add the SELECTED HTML attribute to a specific option
> which is determined only at runtime.  Basically if the current value of
> research_purpose field equals the value of the purpose variable I want to
> insert the select attribute at this point.
>
>       <dtml-if expr="<dtml-var "RESEARCH_PURPOSE"> == <dtml-var "PURPOSE">">
>           SELECTED
>       </dtml-if>
>

jou cant nest <dtml-...> tags

>
> However, I get a syntax error.  How do you usually test the condition when 2
> variable are equal?
>
> Putting the code together:
>
> <select name="Purpose">
>   <dtml-in sqlLookupResearchPurpose>
>     <option value="<dtml-var "RESEARCH_PURPOSE">"
>
>       <dtml&#8722;if expr="<dtml-var "RESEARCH_PURPOSE"> == <dtml-var
> "PURPOSE">">
>           SELECTED
>       </dtml&#8722;if>
>
>     > <dtml-var "RESEARCH_PURPOSE"> </option>
>   </dtml-in>
>
> </select>
>
> If anyone could show me how this is normally done or point me in the
> direction of any tutorials/how-tos etc. it would be appreciated..

<select name="Purpose">
<dtml-let res=sqlLookupResearchPurpose>
  <dtml-in res>
   <option value="<dtml-var  "RESEARCH_PURPOSE">"
                <dtml-if "RESEARCH_PURPOSE==PURPOSE">SELECTED</dtml-if>
   ><dtml-var "RESEARCH_PURPOSE">
  </option>
  </dtml-in res>
</dtml-let res>
</select>

--
-------------------------------------------------------------
Who's got only a hammer sees the world as a nail
hans augustin  (software developer)           hans@beehive.de
beehive elektronische medien GmbH       http://www.beehive.de
phone: +49 30 847-82 0                  fax: +49 30 847-82 299