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https://jira.jboss.org/jira/browse/RF-7849?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jérôme JADOULLE reopened RF-7849:
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I am reopening the bug since I am following the example from the Exadel website.
I have put as much information as possible in an attached document, information
that may help realize why the bug happens.
sorry for the annoyance.
> datascroller does not calculate its page count correctly when used with
> dataTable & with SerializableDataModel...
> -----------------------------------------------------------------------------------------------------------------
>
> Key: RF-7849
> URL: https://jira.jboss.org/jira/browse/RF-7849
> Project: RichFaces
> Issue Type: Bug
> Components: component-tables
> Affects Versions: 3.3.1
> Environment: Windows XP; Richfaces 3.3.1.GA; MyFaces 1.2.6, facelets
> 1.1.14. Project base generated with appfuse v2
> Reporter: Jérôme JADOULLE
> Assignee: Nick Belaevski
> Attachments: datascroller.doc
>
>
> ... or so it seems.
> As others, I am faced with the need to implement a server-side pagination so
> that only a subset of my data gets fetched from my backend (a Hibernate 3
> "managed" database).
> I have read the examples explaining how to do this (see the links below) and
> tried to make them run but I encounter 2 main errors when testing:
> first, when implementing the walk method in the SerializableDataModel, the
> range parameter always returns 0 as its first row and -1 as the quantity.
> When investigating in the source code, I found out that my walk method is in
> fact called by the "modify" method of the "ModifiableModel" class.
> Fact is that, the "range" parameter passed to the walk method is always
> created like this: "new SequenceRange(0, -1)", already meaning that, whatever
> happens, the values used in the range will be 0 and -1.
> Second point appears when I force the quantity of rows to a predefined value
> other than -1 (to see if the rest of the system works fine). When doing
> this, the 20 first columns correctly get displayed in my table but, even if
> the getRowCount() method is correctly implemented as well (returning the
> total quantity of rows in my db), the datascroller uses the
> UIData.getRowCount() method to calculate the quantity of rows it totally
> contains (in order to know how to display itself) and this only returns the
> quantity of items actually present in an ArrayList used to store the rows to
> display.
> Meaning that, whatever the quantity of rows present in my system,
> datascroller always thinks that the size is 20 (in this case).
> Don't know if I am clear enough. If not, i'll post more information.
> Links followed to understand how to implement the datamodel:
> http://gochev.blogspot.com/2009/08/richfaces-server-side-paging-with.html
> http://eclecticprogrammer.com/2008/06/25/sorting-and-paginating-in-the-database-with-richfaces/
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