[Zope] Using lists in DTML

[Ken Kinder]

I'm using Oracle flavor SQL. Can I use that SQL on more than two? This
will eventually be three queries.

"Christopher J. Kucera" wrote:
> 
> Ken Kinder wrote:
> > lists. How would I eliminate duplicates created by querying the
> > same table?
> >
> > Any ideas on what syntax I would use for that?
> 
> What kind of SQL statements are your running?
> 
> If you have the SQL queries returning the same data types, and you're
> using a database that supports it, you could actually combine the SQL
> statements into one with a UNION:
> 
>   select first, second from sometable where second='blahblah'
>   union select first, second from sometable where third='foo'
> 
> (Although, that statement could easily be reduced to
>  "... where second='blahblah' or third='foo'")  Depending on the flavor of
> SQL, you might have to add another keyword in there somehwere to remove
> duplicates.
> 
> If you'd still like to build a list of keys though, you could do the
> following (untested):
> 
> <dtml-let mylist="[]">
>   <ul>
>   <dtml-in ..>
>     <dtml-call "mylist.append(fieldname)">
>     <li>..
>   </dtml-in>
>   <dtml-in ..>
>     <dtml-try>
>       <dtml-if "mylist.index(fieldname) > -1">
>         <li>..
>       </dtml-if>
>     <dtml-except>
>       Already had this item . . .
>     </dtml-try>
>   </dtml-in>
>   </ul>
> </dtml-let>
> 
> The dtml-try in there is because the "index" function on a list gives an
> error if the item is not found.  I don't know of any function that'll just
> return -1 or something, but I'm sure you could write one in python.
> 
> Hope that helps some,
> -CJ
> 
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-- 
Ken Kinder
303.381.7631