Hi everyone,
I have been using GWT-RequestFactory and I have to admit that it pretty
much ease and speed up the development but also some times I feel a bit
more control and flexibility required to be given out of the *API* to
developer.
In short my problem here is : I am not able to send an entity proxy to
server with an id and null version because I get something like this
*The persisted entity with id '1' has null version'*
Here is detailed explanation by example
1)Consider Entity : Employee (id, name, age, address, city country,
gender).
2)Consider a search by keywords page where we have textboxes for
i) Employee ID
II) Name
iii) City
iv) Country
v) gender
3) User chooses any number of above fields, types things and hit enter.
eg. Name : thom --- hit on search
4) A Celltable or Grid appears as results of search
eg. list of all employees whose name like '%thom%', -> Thomas, Thor etc
Hope that explains the feature. So here I am sending the keywords to sever
wrapped in a bean proxy itself. for example when user hits 'Search' button
: ->
req = reqFactory.getEmployeeRequest();
EmployeeProxy emp = req.create(EmployeeProxy.class);
emp.setId(idTextBox.getValue()); //getting entered (or null) value in
text box
emp.setName(nameTextBox.getValue());
//......
req.searchEmployeeByKey(emp).fire(new Receiver<List<EmployeeProxy>> ()
{
public void onSuccess(<List<EmployeeProxy>> list) {........}
});
Here I am using a entity proxy just for search purpose. But if the '*id'
*entity
is populate ( consider user knows employee id and enters it in respective
text box and hit search) like
emp.setId(idTextBox.getValue()) // it not null this time!!! say id is '*
1'*
RequestFactory complains *'The persisted entity with id '1' has null
version'
*So I tried to find a workaround by setting version to *'0' *or any number.
But in my EmployeeLocator I have this :
@Override
public Employee find(Class<? extends Employee> clazz, final Integer id)
{
return employeeDao.findById(id);// *Assume version is 21*. *bam!!
0 != 21 --> Autobean frozen!!!!! *
}
Which will return latest entity from database having the latest version.
Now if its now *'0' *, I mean if it does not match with the arbitrary
version set on client, the RequestFactory will again throw exception
complaining :
*The AutoBean has been frozen.
*
*
--------------x-----------------------------------------------------------x-----------------------------------------------x----------------------------------x
*
*
*Is there any way I can tell RequestFactory:
'*Hey RequestFactory, chill !!!, don't make any checks and don't throw
any exception, this one is just for search purpose*'
Thanks in advance.
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