Seems I spoke too soon. Although the list of countries displays
correctly, it never gets saved.
I have a CountryEditor that has the methods required.
public class CountryEditor extends PropertyEditorSupport {
private GenericManager<Country, Long> countryManager = null;
public void setCountryManager(GenericManager<Country, Long>
countryManager) {
this.countryManager = countryManager;
}
/**
* (non-Javadoc)
*
* @see java.beans.PropertyEditor#setAsText(java.lang.String)
*/
@Override
public void setAsText(String id) throws IllegalArgumentException {
Country country = countryManager.get(Long.valueOf(id));
setValue(country);
}
@Override
public String getAsText(){
Country country = (Country) getValue();
return String.valueOf(country.getId());
}
}
I'm debugging my app, with break points in both methods and these two
methods never get called, even though the thread goes through the
initBinder method. The country manager gets set by a bean property in
dispatcher-servlet.xml.
WebsiteFormController snippet:
protected Map referenceData(HttpServletRequest request) throws Exception {
Map retval = new HashMap<String, Object>();
retval.put("countries", countryManager.getAll());
return retval;
}
@Override
protected void initBinder(HttpServletRequest request,
ServletRequestDataBinder binder) {
binder.registerCustomEditor(Country.class, "country", new
CountryEditor());
}
websiteform.jsp snippet:
<spring:bind path="website.contact.country">
<SELECT size="1" name='<c:out
value="${status.expression}" />1'>
<c:forEach var="country" items="${countries}">
<OPTION value='<c:out value="${country.id}" />'
<c:if
test="${website.contact.country.id==country.id}">SELECTED</c:if>>
<c:out value="${country.name}"/> </OPTION>
</c:forEach>
</SELECT>
</spring:bind>
dispatcher-servlet.xml snippet:
<bean id="countryEditor" class="myapp.model.customeditor.CountryEditor">
<property name="countryManager" ref="countryManager"/>
</bean>
Cheers
Aled
Aled Rhys Jones wrote:
Nice one Mike, finally got it working after spending most of yesterday
scratching my head and cursing google for not finding exactly what I
wanted ;-)
Cheers
Aled
Michael Horwitz wrote:
You are going to need to provide Spring MVC with a way to get from an
id to a country and vice-versa. As you correctly point out this is
done by registering a custom property editor in your controller. To
do this you need to:
1) Extend the class PropertyEditorSupport to create the property
editor:
http://java.sun.com/j2se/1.5.0/docs/api/java/beans/PropertyEditorSupport.html
<http://java.sun.com/j2se/1.5.0/docs/api/java/beans/PropertyEditorSupport.html>
You need to override the getAsText() and setAsText() methods. The
first should call getValue() and return the id as text, and the
second should accept a text id and call setValue() on the editor with
the corresponding country object.
2) You then register this custom editor using one of the appropriate
methods on your controller: initBinder() see api on
http://tinyurl.com/2sutrm
And it should all work like magic....
Mike.
On 7/1/07, *Aled Rhys Jones* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Hi peeps
Could someone recommend the best way of populating a drop down
list in
edit/add forms? New to spring mvc and not sure of the correct
way of
going about it.
I have a list of countries stored in the database. Access to
these are
provided by a Generic Manager for crud. One of my edit pages
needs to
associate the object with a Country. I've tried to do it with
referenceData but I'm getting problems.
protected Map referenceData(HttpServletRequest request) throws
Exception {
Map retval = new HashMap<String, Object>();
retval.put("countryList", countryManager.getAll());
return retval;
}
The above does return a list of country objects.
I've got the below in my jsp:
<form:select path="contact.country">
<form:option value="-" label="--Please Select"/>
<form:options items="${countryList}" itemValue="id"
itemLabel="name"/>
</form:select>
Unfortunately this throws a JasperException when I try to load the
page. If I remove the above from the jsp the page works fine.
From my googling, it seems I may need to use a PropertyEditor, but I
can't find any concrete examples of what I'm trying to do, and
how to
use the PropertyEditor in this context.
Methinks I really need to buy a spring mvc book ;-)
Any ideas?
Thanks
Aled
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