[Zope] Date Manipulation

[Martijn Pieters]

At 16:17 03/03/99 , Luke Duff wrote:
>Thanks for the help, but...
>
>My problem is a little bit harder than that. The data in field2 is date *and* 
>time. So like this:
>
>field1 field2
>------ ---------------
>red    3/1/99 10:00 AM
>blue   3/1/99 11:00 AM
>green  3/1/99 03:00 PM
>brown  3/2/99 10:00 AM
>yellow 3/2/99 04:30 PM
>
>I've seen in the guide where you can format a data field when outputting, but 
>how do actually extract the day-of-the-month number and put it in a temp 
>variable. The pseudo-code I've used before to do this before is:
>
>tempday = 0
>for each record
>  if tempday<>dayofmonth(datefield) then
>     print out a header
>  print out other fields
>  tempday = dayofmonth(datefield)
>next
>

You'll have to use SQL function for this. In MySQL you could do the following:
SELECT field1, DATE_FORMAT(field2, "W, M d") as datefield FROM MyDB.

Put this in a Z SQL Method, and then the following DTML will get you your
results:
<!--#in MySQLMethod sort=datefield-->
  <!--#if first-datefield-->
    <!--#var datefield-->, 
    <BLOCKQUOTE>
  <!--#/if-->

  <!--#var field1-->

  <!--#if last-datefield-->
    </BLOCKQUOTE>
  <!--#/if-->

<!--#else-->
  Sorry, no colors in your query.
<!--#/in-->


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