I didn't see Olof's original post, but this is what the PREPARE event is for.
Use it to set up the object that is being edited using the form context.
Also, note that there is a limitation with form validation. From the docs:
- tracker
- org.apache.tapestry.ValidationTracker
- defaultTracker
- prop
- The object which will record user input and validation errors. The object
must be persistent between requests (since the form submission and validation
occurs in an component event request and the subsequent render occurs in a
render request). The default is a persistent property of the Form component
and this is sufficient for nearly all purposes
__ (except when a Form is rendered inside a loop). __
Cheers,
Nick.
Angelo Chen wrote:
Hi,
oic, maybe an ajax will do? I am thinking of providing a hidden form, when
user click a link in one record, it will insert the hidden form below the
selected row for user to edit, then submit it via an ajax call and close the
form, not yet tried.
A.C.
"Olof =?UTF-8?Q?N=C3=A6ss=C3=A9n" ?= wrote:
I'm afraid not. I ended up with enclosing all users in one big form. I
thought it wasn't worth solving when the one form approach worked just
fine in my case.
/Olof
On 29/10/2007, Angelo Chen <[EMAIL PROTECTED]> wrote:
Hi Olof,
Did you find a solution to this? I have similar need as yours this time.
A.C.
"Olof =?UTF-8?Q?N=C3=A6ss=C3=A9n" ?= wrote:
I have a problem with using forms in components where the data model
is passed to the components via parameter inside a T5 loop component.
When a form is submitted the data model seems to be lost.
What I'm trying to do is to iterate through a collection of users and
construct a form for each user where a user name can be edited. Each
form resides in a component that handles submission. The user model
data is passed to the component inside a page where a loop loops
through a collection of users. The idea is to have a form for each
user so when submitting a form, only the user edited will get updated.
However, when a form is submitted the user data model is lost and ends
up as a null pointer.
I wouldn't be surprised if I've missed something obvious or if the way
I try to achieve a form for each user isn't a valid usage of T5. Any
thoughts or suggestions? I've attached a simple example demonstrating
my approach in this email.
/Olof
// User.java Data Model
package org.example;
public class User
{
private String name;
public User(String name)
{
this.name = name;
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
}
//Users.java T5 Page
package org.example.testapp.pages;
import java.util.ArrayList;
import java.util.List;
import org.apache.tapestry.annotations.Persist;
import org.example.User;
public class Users
{
private User user;
@Persist("flash")
private List<User> users;
public void onActivate()
{
if (users == null)
{
users = new ArrayList<User>();
users.add(new User("Ted"));
users.add(new User("Olof"));
}
}
public User getUser()
{
return user;
}
public void setUser(User user)
{
this.user = user;
}
public List<User> getUsers()
{
return users;
}
}
// Users.html T5 Template
<html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd";>
<head>
</head>
<body>
<t:loop source="users" value="user">
<t:edituser user="user"/>
</t:loop>
</body>
</html>
//EditUser.java T5 Component
package org.example.testapp.components;
import org.apache.tapestry.annotations.Parameter;
import org.example.User;
public class EditUser
{
@Parameter(required = true)
private User user;
public void setUser(User user)
{
this.user = user;
}
public User getUser()
{
return user;
}
public void onSuccess()
{
// save user
}
}
//EditUser.html T5 Template
<t:form xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd";>
<t:textfield value="user.name"/><br/>
<t:submit t:id="save" value="save"/>
</t:form>
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