Ok, using Postgresql 7.0.2-2, PoPo 2.0.1, ZPoPyDA 1.1-pre2, Zope 2.2.5,
here's a reproducible scenario:

Create the following tables in your database:

create table bugtest1 (
name text,
domain text,
);

create table bugtest2 (
name text,
domain text,
refer text,
foreign key(refer) references bugtest1(name)
);

insert into bugtest1 values ('a','aa');
insert into bugtest1 values ('b','bb');
insert into bugtest1 values ('c','cc');
insert into bugtest2 values ('w','ww','a');
insert into bugtest2 values ('x','xx','a');
insert into bugtest2 values ('y','yy','a');
insert into bugtest2 values ('z','zz','a');
insert into bugtest2 values ('g','gg','b');
insert into bugtest2 values ('h','hh','b');
insert into bugtest2 values ('i','hh','b');

Create the following folder structure:

/root
  dbconn (ZPoPyDA connection to whatever database you just put the tables
in)
  index_html
  get_host (Z SQL method)
  get_alias (Z SQL method)
  /alias
    show
  /host
    show

/root/get_host

select * from bugtest1

/root/get_alias

select * from bugtest2
<dtml-sqlgroup where>
  <dtml-sqltest name column=refer type=string>
</dtml-sqlgroup>

/root/alias/show

<TR><TD></TD><TD>&dtml-name;</TD><TD>&dtml-domain;</TD></TR>

/root/host/host

<TR><TD>&dtml-name;</TD><TD>&dtml-domain;</TD></TR>

/root/index_html:

  1: <dtml-var standard_html_header>
  2: <TABLE>
  3: <dtml-in get_host>
  4:   <dtml-with host><dtml-var show></dtml-with>
  5:   <dtml-in "get_alias(name=name)">
  6:     <dtml-let name2=name
  7:               domain2=domain>
  8:     <dtml-with alias>
  9:       <TR><TD>POINT
A</TD><TD>&dtml-name;</TD><TD>&dtml-domain;</TD></TR>
 10:       <TR><TD>POINT
B</TD><TD>&dtml-name2;</TD><TD>&dtml-domain2;</TD></TR>
 11:       <dtml-var show>
 12:     </dtml-with>
 13:     <TR><TD>POINT C</TD><TD>&dtml-name;</TD><TD>&dtml-domain;</TD></TR>
 14:     <TR><TD>POINT
D</TD><TD>&dtml-name2;</TD><TD>&dtml-domain2;</TD></TR>
 15:     </dtml-let>
 16:   </dtml-in>
 17: </dtml-in>
 18: </TABLE>
 19: <dtml-var standard_html_footer>


The output of all that is (a bit hard to read):

a aa 

POINT A a aa 
POINT B w ww 
 a aa 
POINT C w ww 
POINT D w ww 

POINT A a aa 
POINT B x xx 
 a aa 
POINT C x xx 
POINT D x xx 

POINT A a aa 
POINT B y yy 
 a aa 
POINT C y yy 
POINT D y yy 

POINT A a aa 
POINT B z zz 
 a aa 
POINT C z zz 
POINT D z zz 

<snipped for clarity>


So: at point A, the "name" and "domain" variables have been overwritten with
the "name" and "domain" variables as they were on line 6/7, *BUT* name2 and
domain2 haven't been overwritten (point B). BUT, outside the dtml-with tab
(point C) "name" and "domain" are at their correct values.

So - given that the dtml-with tag "must" work, I'm clearly not understanding
*how* it works.

Regards,
Phil

+----------------------------------+
| Phil Mayers, Network Support     |
| Centre for Computing Services    |
| Imperial College                 |
+----------------------------------+  

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