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https://issues.apache.org/jira/browse/TAPESTRY-2278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12582487#action_12582487
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Sven Homburg commented on TAPESTRY-2278:
----------------------------------------
i am back ;-)
i think this little sample shows my problem
rendered by tap5 (here symplified):
<select id="mySelect"
onChange="location=/mts/freightorder/edit.inputcustomer:change">
<option value=""></option>
<option value="1">customer 1</option>
<option value="2">customer 2</option>
<option value="3">customer 3</option>
</select>
page class (partial):
@OnEvent(component = "inputCustomer", value = "change")
JSONObject customerSelected(Long value)
{
JSONObject json = new JSONObject();
json.put("found", false);
if (value != null)
{
Customer customer = (Customer)
getDAO(Customer.class).doRetrieve(value, false);
if (customer != null)
{
json.put("found", true);
json.put("street", customer.getAddress().getStreet());
json.put("location", customer.getAddress().getZip() + " " +
customer.getAddress().getCity());
json.put("phone", customer.getAddress().getPhone1());
json.put("fax", customer.getAddress().getFax1());
json.put("email", customer.getAddress().getEmail1());
_entity.setCustomer(customer);
}
}
return json;
}
if user choices the blank option tapestry throws an NFE.
if i could set the blank option value to "0", so i can react in this event
method
> BlankOption value in Select component should be configurable
> ------------------------------------------------------------
>
> Key: TAPESTRY-2278
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2278
> Project: Tapestry
> Issue Type: Improvement
> Components: tapestry-core
> Affects Versions: 5.0.11
> Reporter: Sven Homburg
> Fix For: 5.0.12
>
>
> i often use the option value of a select component holding id's for database
> entities.
> the id's type are most numeric values, so my problem is:
> i attached an ajax request that sends each change from the select component.
> the following method catch the event
> @OnEvent(component = "inputProject", value = "change")
> JSONValue projectIdChanged(long projectId)
> {
> .....
> return mapper.toJSON(resultList);
> }
> if the user select the blank option
> the component throws a NumberFormatException
> so it were cool, if i declare the empty option value by my self.
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