[albatross-users] Trying to work around pagnation with cols issue...

[Matt Goodall]

On Sun, 2003-06-22 at 23:51, Michael C. Neel wrote:
> Currently Albatross doesn't support pagesize and cols in the same al-for
> tag, and I'm trying towork around this by grouping my results into cols
> and using two al-for tags for the output.  It's not working, and I'm not
> sure why.
> 
> Here is the page_process for the section I'm testing with:
> 
>             photos =
> ['One','Two','Three','Four','Five','Six','Seven','Eight','Nine']
>             ctx.locals.photos = []
>             # We now must make ctx.locals.photos be a list of (up to) 3
> element lists of photos
>             # this is because albatross doesnot support pagnation with a
> cols attrib
>             temp = []
>             for pht in photos:
>                 temp.append(pht)
>                 if len(temp) == 3:
>                     ctx.locals.photos.append(temp[:]) # [:] is an
> explict copy
>                     temp = []
>             if len(temp):
>                 ctx.locals.photos.append(temp[:]) # [:] is an explict
> copy

A slightly nicer way of writing this might be:

    photos = [...]
    ctx.locals.photos = []
    i = 0
    while 1:
        row = photos[i:i+3]
        if not row: break
        ctx.locals.photos.append(row)
        i = i+3

But that wasn't the question ;-)

> 
> And then in my template file:
> 
>       <table>
>         <al-for expr="photos" iter="row" pagesize="2">
>         <tr>
>           <al-for expr="row.value()" iter="cell">
>           <al-exec expr="pht = cell.value()">
>           <td align="center"><al-value expr='pht' noescape>
>           </td>
>           </al-for>
>         </tr>
>         </al-for>
>       </table>
>       <table>
>         <tr>
>             <al-form method="POST">
>             <td>
>             <al-if expr="row.has_prevpage()">
>               <al-input type="submit" prevpage="row" value="<<"
> name="photo_prev">
>              </al-if>
>             </td><td align="right">
>              <al-if expr="row.has_nextpage()">
>               <al-input type="submit" nextpage="row" value=">>"
> name="photo_next">
>              </al-if>
>             </td>
>             </al-form>
>         </tr>
>       </table>
> 
> The next button does appear, but clicking it doesn't advance to the next
> page.

Hmm. I can't see anything wrong. I've tried the above code here and it
works ok with Albatross 1.10pre1. The name="photo_prev" and
name="photo_next" attributes are redundant since they are generated by
the tag but that doesn't seem to matter.

What type of app (stateful/random, session in form/file/server etc) are
you writing and what version of Albatross are you using?

- Matt

-- 
Matt Goodall
Pollenation Internet Ltd, http://www.pollenation.net
e: matt at pollenation.net