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Date: Tue, 07 Dec 2004 14:43:08 +0100
From: Leszek Gawron <lgawron@mobilebox.pl>
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To: dev@cocoon.apache.org
Subject: Re: [cforms] Repeater and large collections
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Reinhard Poetz wrote:
> 
> Suppose you have a repeater that is bound to a potentially very large 
> collection of objects (e.g. a list with 8000 objects) provided by an 
> O/R-mapper.
> First, it is not a good idea to show all 8000 rows on one page. Some 
> kind of paginating functionality is needed. Does anyone have a working 
> "paging" solution?
I am doing pagination but use CForms only for handling actions and 
buttons. I do not render rows with a repeater. It is implemented by a 
set of jx macros. The control allows for following:

- display a set of rows
- display navigation (first, prev, next, last)
- control the number of rows displayed
- seek to a specified page
- filter the results with cforms widgets

> 
> Second, I don't want to bind, let's say 10000 objects (means copying 
> 10000 objects!) to a repeater, though the user should have the 
> possibility to edit all rows.
> 
> I can think of
> 
> a) Don't use cForms for the table. Each row has an "edit" button and 
> after clicking it, a new page that only shows a single object opens.
> 
>  + use lazy loading features of O/R mapping tool
>    --> low memory consumption
>  - works around the cForms framework
>    --> how to implement "mass operations" like deleting a group of objects?
each row having a checkbox and a delete action. Would have to fetch ids 
to delete by yourself (out of CForms).

-- 
Leszek Gawron                                      lgawron@mobilebox.pl
Project Manager                                    MobileBox sp. z o.o.
+48 (61) 855 06 67                              http://www.mobilebox.pl
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