Application.getCustomer() returns a Customer instance. The reason equals()
is being passed a
Long (I believe) is because I am mapping Application.customer to a Customer
instance by it's id
in the Customer database table, i.e:
@OneToOne(cascade = CascadeType.ALL)
@JoinColumn(name="customer_fk")
public Customer getCustomer()
{
return customer;
}
where the customer_fk column is of type int8. Isn't this correct procedure?
Mike Horwitz wrote:
>
> Looks like the Application.getCustomer() method is returning a Long? Is
> this
> possible? Spring MVC encourages the use of domain objects in the form, so
> customers + Application.getCustomer() should both return Customer objects.
>
> Mike
>
> On 10/16/07, George.Francis <[EMAIL PROTECTED]> wrote:
>>
>>
>> Do I have to change the equals() method too? Now I get the following on
>> the
>> ApplicationForm:
>>
>> [ismid] ERROR [http-8080-Processor25] OptionsTag.doStartTag(84) |
>> java.lang.Long cannot be cast to com.ism.ismid.model.Customer
>> java.lang.ClassCastException: java.lang.Long cannot be cast to
>> com.ism.ismid.model.Customer
>> at com.ism.ismid.model.Customer.equals(Customer.java:35)
>> at
>> org.springframework.util.ObjectUtils.nullSafeEquals(ObjectUtils.java:170)
>> at
>>
>> org.springframework.web.servlet.tags.form.SelectedValueComparator.isSelected
>> (SelectedValueComparator.java:90)
>> at
>> org.springframework.web.servlet.tags.form.OptionWriter.isSelected(
>> OptionWriter.java:184)
>> at
>> org.springframework.web.servlet.tags.form.OptionWriter.renderOption(
>> OptionWriter.java:172)
>>
>>
>>
>> George.Francis wrote:
>> >
>> > Would that be ApplicationFormController's initBinder method?
>> > This is my setAsText method:
>> >
>> > public void setAsText(String text) throws
>> IllegalArgumentException
>> > {
>> > Customer obj;
>> > if (text == null || text.length() == 0) {
>> > setValue(null);
>> > } else {
>> > obj = new Customer();
>> > obj.setId(Long.parseLong(text));
>> > setValue(obj);
>> > }
>> > }
>> >
>> >
>> >
>> > Mike Horwitz wrote:
>> >>
>> >> On 10/15/07, George.Francis <[EMAIL PROTECTED]> wrote:
>> >>>
>> >>>
>> >>> OK, after reading this I assume I need to define a class
>> >>> ApplicationBeanInfo
>> >>> which extends SimpleBeanInfo, whose getPropertyDescriptors() method
>> uses
>> >>> a
>> >>> class CustomerEditor (which I also have to write) which extends
>> >>> PropertyEditor?
>> >>
>> >>
>> >> Not quite. You only need to write a CustomerEditor (easiest way is by
>> >> extending PropertyEditorSupport and overriding the getAsText() and
>> >> setAsText() methods) which you register in your controller using the
>> >> initBinder() method: http://tinyurl.com/2sutrm
>> >>
>> >> Mike
>> >>
>> >> mraible wrote:
>> >>> >
>> >>> > You need a PropertyEditor to translate the "id" that's coming for
>> >>> > Customer to a real customer object from your database.
>> >>> >
>> >>> > http://www.springframework.org/docs/reference/validation.html
>> >>> >
>> >>> > Matt
>> >>> >
>> >>> > On 10/12/07, George.Francis <[EMAIL PROTECTED]> wrote:
>> >>> >>
>> >>> >> Hi, I have two entities in my Spring MVC app, 'Application' and
>> >>> >> 'Customer'.
>> >>> >> The Application edit form has a drop-down list of Customers so
>> that
>> >>> one
>> >>> >> can
>> >>> >> be associated with the Application. THis is done via the
>> following
>> >>> tags
>> >>> >> in
>> >>> >> the JSP;
>> >>> >>
>> >>> >> <form:select path="customer">
>> >>> >> <form:options items="${customers}" itemValue="id"
>> >>> >> itemLabel="name"/>
>> >>> >> </form:select>
>> >>> >>
>> >>> >> When I submit the form I get a validation error:
>> >>> >> "Failed to convert property value of type [java.lang.String] to
>> >>> required
>> >>> >> type [com.ism.ismid.model.Customer] for property customer; nested
>> >>> >> exception
>> >>> >> is java.lang.IllegalArgumentException: Cannot convert value of
>> type
>> >>> >> [java.lang.String] to required type [com.ism.ismid.model.Customer]
>> >>> for
>> >>> >> property customer: no matching editors or conversion strategy
>> found"
>> >>> >>
>> >>> >> Can someone see why this is happening?
>> >>> >>
>> >>> >>
>> >>> >> --
>> >>> >> View this message in context:
>> >>> >>
>> >>>
>> http://www.nabble.com/Problemn-associating-entities-via-form-tf4616135s2369.html#a13183354
>> >>> >> Sent from the AppFuse - User mailing list archive at Nabble.com.
>> >>> >>
>> >>> >>
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>> >>> >>
>> >>> >
>> >>> >
>> >>> > --
>> >>> > http://raibledesigns.com
>> >>> >
>> >>> >
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>> >>
>> >
>> >
>>
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