You are viewing a plain text version of this content. The canonical link for it is here.
Posted to adffaces-user@incubator.apache.org by Adam Winer <aw...@gmail.com> on 2006/12/11 16:45:59 UTC
Re: tr:table & pagin
On 12/11/06, Marcus Bond <ma...@hotmail.com> wrote:
> From what I can gather, in Trinidad the total number of records in a table
> is automatically 'known' by the number of rows in the model. However, what
> if you don't want to fetch the whole set of data from the database and would
> prefer to only fetch the required rows from the database for each page?
No, not the case. Just like in Tomahawk and with h:dataTable,
we support the DataModel API. If you don't know how many rows
there are, then return -1 from getRowCount(). The only requirement -
which applies to all users of the JSF DataModel API - is that if
someone calls setRowIndex(...), isRowAvailable() has to figure
out if that row really exists.
The Trinidad CollectionModel API extends DataModel to add support
for sorting and identifying-rows-by-keys-instead-of-indices - but
the same rules apply. So you could extend CollectionModel instead
of DataModel if you want those add-on features, but we support
both DataModel and CollectionModel.
-- Adam
>
> I only want to query for a small number of records (1 page) at a time but
> need some way of informing the table component that there are in fact a lot
> more records in the database.
> This would require setting a variable that represents the total number of
> rows available from the database, but there doesn't appear any longer to be
> this facility.
>
> Is there a straightforward way of doing this? (eg: like the dataScroller in
> tomahawk)
>
> thanks,
> Marcus
>
> _________________________________________________________________
> It's Hotmail's 10th Birthday! Come and play Pass the Parcel
> http://www.msnpasstheparcel.com
>
>
Re: tr:table & pagi
Posted by Adam Winer <aw...@gmail.com>.
Yes, that's it.
-- Adam
On 12/20/06, Marcus Bond <ma...@hotmail.com> wrote:
> Thanks for the reply,
> So is the way of doing this to extend a dataModel class and implement my own
> getRowCount() method?
>
>
> >From: "Adam Winer" <aw...@gmail.com>
> >Reply-To: adffaces-user@incubator.apache.org
> >To: adffaces-user@incubator.apache.org
> >Subject: Re: tr:table & pagin
> >Date: Mon, 11 Dec 2006 08:45:59 -0800
> >
> >On 12/11/06, Marcus Bond <ma...@hotmail.com> wrote:
> >>From what I can gather, in Trinidad the total number of records in a table
> >>is automatically 'known' by the number of rows in the model. However,
> >>what
> >>if you don't want to fetch the whole set of data from the database and
> >>would
> >>prefer to only fetch the required rows from the database for each page?
> >
> >No, not the case. Just like in Tomahawk and with h:dataTable,
> >we support the DataModel API. If you don't know how many rows
> >there are, then return -1 from getRowCount(). The only requirement -
> >which applies to all users of the JSF DataModel API - is that if
> >someone calls setRowIndex(...), isRowAvailable() has to figure
> >out if that row really exists.
> >
> >The Trinidad CollectionModel API extends DataModel to add support
> >for sorting and identifying-rows-by-keys-instead-of-indices - but
> >the same rules apply. So you could extend CollectionModel instead
> >of DataModel if you want those add-on features, but we support
> >both DataModel and CollectionModel.
> >
> >-- Adam
> >
> >>
> >>I only want to query for a small number of records (1 page) at a time but
> >>need some way of informing the table component that there are in fact a
> >>lot
> >>more records in the database.
> >>This would require setting a variable that represents the total number of
> >>rows available from the database, but there doesn't appear any longer to
> >>be
> >>this facility.
> >>
> >>Is there a straightforward way of doing this? (eg: like the dataScroller
> >>in
> >>tomahawk)
> >>
> >>thanks,
> >>Marcus
> >>
> >>_________________________________________________________________
> >>It's Hotmail's 10th Birthday! Come and play Pass the Parcel
> >>http://www.msnpasstheparcel.com
> >>
> >>
>
> _________________________________________________________________
> It's Hotmail's 10th Birthday! Come and play Pass the Parcel
> http://www.msnpasstheparcel.com
>
>
Re: tr:table & pagin
Posted by Marcus Bond <ma...@hotmail.com>.
Thanks for the reply,
So is the way of doing this to extend a dataModel class and implement my own
getRowCount() method?
>From: "Adam Winer" <aw...@gmail.com>
>Reply-To: adffaces-user@incubator.apache.org
>To: adffaces-user@incubator.apache.org
>Subject: Re: tr:table & pagin
>Date: Mon, 11 Dec 2006 08:45:59 -0800
>
>On 12/11/06, Marcus Bond <ma...@hotmail.com> wrote:
>>>From what I can gather, in Trinidad the total number of records in a table
>>is automatically 'known' by the number of rows in the model. However,
>>what
>>if you don't want to fetch the whole set of data from the database and
>>would
>>prefer to only fetch the required rows from the database for each page?
>
>No, not the case. Just like in Tomahawk and with h:dataTable,
>we support the DataModel API. If you don't know how many rows
>there are, then return -1 from getRowCount(). The only requirement -
>which applies to all users of the JSF DataModel API - is that if
>someone calls setRowIndex(...), isRowAvailable() has to figure
>out if that row really exists.
>
>The Trinidad CollectionModel API extends DataModel to add support
>for sorting and identifying-rows-by-keys-instead-of-indices - but
>the same rules apply. So you could extend CollectionModel instead
>of DataModel if you want those add-on features, but we support
>both DataModel and CollectionModel.
>
>-- Adam
>
>>
>>I only want to query for a small number of records (1 page) at a time but
>>need some way of informing the table component that there are in fact a
>>lot
>>more records in the database.
>>This would require setting a variable that represents the total number of
>>rows available from the database, but there doesn't appear any longer to
>>be
>>this facility.
>>
>>Is there a straightforward way of doing this? (eg: like the dataScroller
>>in
>>tomahawk)
>>
>>thanks,
>>Marcus
>>
>>_________________________________________________________________
>>It's Hotmail's 10th Birthday! Come and play Pass the Parcel
>>http://www.msnpasstheparcel.com
>>
>>
_________________________________________________________________
It's Hotmail's 10th Birthday! Come and play Pass the Parcel
http://www.msnpasstheparcel.com