No updated to null fields are present in request's "data" list

[Oleg]

Hi

On DynamicForm I have SelectItem for Department name:

final SelectItem itemDepartment = new SelectItem("idDepartment");
itemDepartment.setTitle("Department");
itemDepartment.setOptionDataSource(DepartmentDataSource.getInstance());
itemDepartment.setValueField("id");
itemDepartment.setDisplayField("depName");
itemDepartment.setIcons(clearPicker);

the clearPicker defined as

PickerIcon clearPicker = new PickerIcon(PickerIcon.CLEAR, new FormItemClickHandler() {  
    public void onFormItemClick(FormItemIconClickEvent event) {
          event.getItem().clearValue();
    }  
});

Almost everything works fine. But when record had Department defined and then it was removed by using clearPicker I can't save this record with new (null) value for idDepartment field.

the request that I can see in transformRequest looks like this:

 
request.getJsObj(): {
...
    "data":{
        "id":16, 
        "date":"2011-01-23T23:00:00", 
        "description":"test description"
    }, 
...
    "oldValues":{
        "id":16, 
        "idDepartment":10, 
        "date":"2011-01-23T23:00:00", 
        "description":"test description"
    }, 
...

So field "idDepartment" is present in "oldValues" section and absent in "data".

I also noticed that when I delete date from DateItem defined on the same DynamicForm the request looks like

request.getJsObj(): {
...
    "data":{
        "id":16, 
        "date":null, 
        "description":"test description"
    }, 
...
    "oldValues":{
        "id":16, 
        "description":"test description"
    }, 
...

field "date" is present in "data" section and absent in "oldValues".

It was tested on SmartGWT LGPL 2.3 and 2.4

Is it correct behavior for request's "data" and "oldValues" lists?

[Isomorphic]

Use setValue(null) if you are actually trying to establish that the field is changing to an explicit null value rather than to no value specified.

[Oleg]

Unfortunately using
event.getItem().setValue(null);
just raise "The method setValue(Date) is ambiguous for the type FormItem" error during the compilation.

[Isomorphic]

You've already got the null value you want for the date field with clearValue() - use setValue(null) for the text field.

[Oleg]

Sorry, but clearPicker is defined for "idDepartment" field which is Integer. And I can pass to setValue() values of int or String or boolean types. But null is raising the "The method setValue(Date) is ambiguous for the type FormItem" error even when clearPicker is just defined in the class and not assigned to any item on the form.

[Isomorphic]

Doesn't typecasting the null to be a String null disambiguate the call?

[Oleg]

Hi Isomorphic

Typecasting is working fine. The problem is solved.
Thank you for help very much!