RE: hibernate objects and PropertySelection

[seloha .]

I think your problem is that you have confused option and value and they 
should be:

   public Object getOption(int index) {
       return (Truck)TruckList.get(index);
   }
and:

   public Object translateValue(String value) {
       Integer id = Integer.parseInt(value);
       Iterator TruckListIt = TruckList.Iterator
       while (TruckListIt.hasNext()) {
         Truck truck = (Truck)TruckListIt.next();
          if (truck.getId().equals(id)) {
            return truck;
            break;
         }
       }
   }

This should be more or less on the right lines. If you want to redisplay the 
page make sure that your "truck" bean that I assume is a hibernate mapping 
class implements public boolean equals(Object o) and uses your id for the 
comparison.

Hope this helps,

Paul


From: Allan Rank <[EMAIL PROTECTED]>
Reply-To: "Tapestry users" <tapestry-user@jakarta.apache.org>
To: tapestry-user@jakarta.apache.org
Subject: hibernate objects and PropertySelection
Date: Wed, 12 Oct 2005 15:18:38 +0300

Hello!

One newbie question :)
I'm having problems using PropertySelection to generate
<select> from hibernate objects.

For example:

I have 1 database table from which I want to generate <select>, let's
call it Truck:

id -----  trucknr
1             111AAA
2             112BBB 5             113CCC

Then I have a Truck class, hibernate object for that table and I have 
implemented
PropertySelectionModel:

public class TruckSelectionModel implements IPropertySelectionModel {
   private List TruckList;
   public TruckSelectionModel(List TruckList) {
       this.TruckList = TruckList;
   }
   public int getOptionCount() {
       return TruckList.size();
   }
   public Object getOption(int index) {
       return ((Truck)TruckList.get(index)).getId();
   }
   public String getLabel(int index) {
       return ((Truck)TruckList.get(index)).getTruckNr();
   }
   public String getValue(int index) {
       return ((Truck)TruckList.get(index)).getId().toString();
   }
   public Object translateValue(String value) {
       return getOption(Integer.parseInt(value));
   }
}


Generation of <select> is ok:

<select name="Truck">
<option value="2">112BBB</option>
<option value="1">111AAA</option>
<option value="5">113CCC</option>
</select>

Tapestry asks for trucks count (getOptionCount() = 3), then starts to
ask for values/id's by index (getOption(0), getOption(1), getOption(2) 
etc...).

BUT when i select, for example 113CCC-option(with database id/option value 
5) and submit my form, Tapestry asks my PropertySelectionModel to getOption 
with index 5!
There is no TruckList member with index 5.  DB id's and list indexes are 
messed up.

So my question is: how is it possible to use hibernate objects to generate
<select> with PropertySelectionModel?




Thanks!
--

ALLAN RANK

mob: + 372 56 239925    msn: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
skype: trutata                   [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>



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