[Zope] Multiple Selection with "Checkboxes":

[Arno Gross]

You can try:

<dtml-in List_available_items>
<input type=checkbox name=ap_selection:list value="<dtml-var "_['sequence-item']">"
         <dtml-if expr="_['sequence-item'] in List_selected_items">
                         checked (<dtml-var "_['sequence-item']">)
                 </dtml-if>
 >
<dtml-var sequence-item><br>
</dtml-in>

You have a list and you must ask for membership (with 'in'), also you can save
one <dtml-in>.

Best regards
   Arno

>On Wed, 25 Jul 2001, Richard Bendit wrote:
> What i use is:
> 
> 1. UpdateForm (DTML-Method)
> 2. List_available_items (ZSQL-Method)
>    "select ap_id,ap_docname from AliasPages where proj_id=<dtml-sqlvar
> proj_id type=int>"
> 3. List_selected_items (ZSQL-Method)
>    "select ap_selection from Projects where proj_id=<dtml-sqlvar proj_id
> type=int>"
> 
> Problem: I want that the Checkboxes are "CHECKED" if "available_items" ==
> "selected_items"
> 
> I am not sure if my dtml is wrong or the sql-method: ! See the TIP at the
> end of this mail !
> 
> ****************************
> Here the: "UpdateForm"
> ****************************
> 
> <dtml-call "REQUEST.set('selectedITEMS',[])">
> <dtml-in List_SelectedALIASPAGES>
>   <dtml-call "selectedITEMS.append(proj_id)">
> </dtml-in>
> 
> <dtml-in List_available_items>
>       <input type=checkbox name=ap_selection:list value="<dtml-var
> sequence-item>"
> 		<dtml-call expr="REQUEST.set(selectedAP,_['sequence-item'])">
> 		<dtml-in List_selected_items>
> 			<dtml-if expr="_['sequence-item'] == selectedITEMS">
> 				checked
> 			</dtml-if>>
> 		</dtml-in>
>       <dtml-var sequence-item><br>
> </dtml-in>
>    </TD>
> </TR><dtml-comment>colname:ap_selection,table:Projects</dtml-comment>
> 
> ****************************
> 
> Here a tip i found:
> 
> "How to construct such a query?
> If you know, that your values do not contain quotes (i.e. '),
> then you can use "_.string.join" like this:
> 
>      select ... where
>      col in ( <dtml-var "_.string.join(multiple_selection,',')"> )"
> 
> 
> 
> I recognized that a lot of USERS have these problems with "Multiple
> Selections". So if you will help to find a good way to manage this i will
> post a "How-To" in Zope and i wanted to create an ADD-ON for the great
> product "ZNolk".
> 
> 
> 
> THANX you all for your time.
> 
> 
> 
> REGARDS
> 
> 
> 
> Richard
> 
> 
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