T5.1.0.5 problem with a grid

[upgrading]

Hi

I have a problem with a grid, i did a custom grid in a Form when i sort the
grid there isn't problem but i use a button in my form after sorting grid
after i have an exception :

java.lang.NullPointerException
org.apache.tapestry5.corelib.components.Grid$DefaultGridSortModel.getSortConstraints(Grid.java:346)
 
org.apache.tapestry5.corelib.components.Grid.setupDataSource(Grid.java:463) 

In my .java

// List to fill the grid
@Persist
private List listGrid;

public Object onActivate() {
/* fill list for the grid /
  listGrid = (List) userManager.findString("select u from
Users u inner join fetch u.role inner join fetch u.shop w");
}

// sent list to the grid
public List getList() {  
return  (List) listGrid; 
}

@SetupRender
void initializeValue() { 
i=((grid.getCurrentPage()-1) * (grid.getRowsPerPage())+1);
// Grid model
this.model = 
beanModelSource.createDisplayModel(Users.class,messages);
this.model.add("shop",pcSource.create(Users.class,
"shop.shoCode")).sortable(false);
this.model.add("role",pcSource.create(Users.class,
"role.rolDesignation")).sortable(false);
this.model.add("count",null);
this.model.add("remove",null);

this.model.exclude("useDateCreat","useDateModif","useId","usePassword");
this.model.reorder("count","useReference","useFirstname","useName","useLogin","useEmail","shop","role","useActive","remove");
}

tml page :


${getCount()}

 ${user.useReference} 






${user.shop.shoCode}




Is somebody can help me to solve this problem? I have tried lot of
things.

Thanks in advance



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Re: T5.1.0.5 problem with a grid

[upgrading]

Hi Thiago,

Thx you for your piece of advices, it is working ;-)

Regards,

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[T.5.3] problem with sessionstate

[upgrading]

hello 

I have a problem in tapestry  with a session State : 

when I valide page the session became empty. I don't find where, i loose
session. 
But when i try open an other page all of parameter are null.  
the other pages are OK if i don't use this one in first. 


I think this page is busy, due to there are lot of requests in it.  


What  can I test to go to a solution? 



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