Hello!
I need help with the following SQL-method, which I don't know if it is a
bug, or if it is my mistake.
I am building a search interface to a database (Zope 2.2.4 w all HF's,
Oracle 8.1.7, Solaris), and I want to use the following sqlmethod, to let
the user enter any combination of search parameters, including none:
select * from ladok.kurs
dtml-sqlgroup where
dtml-sqltest kurs_kod column="kod"
op="like" type="string" optional
dtml-and
dtml-sqltest kurs_namn column="benamns"
op="like" type="string" optional
/dtml-sqlgroup
From the Zope Book, Chapter 10, I got the impression that the "optional"
part of the sqltest tag would render the parts that where not null; i.e. if
I only specify the kurs_namn variable (first sqltest), the method would
render the following SQL:
select * from ladok.kurs
where
(kod like 'XX')
or, if no search parameters where specified, it would render the following
SQL:
select * from ladok.kurs
However this is not the case, what I get if I enter XX for kurs_kod is the
following SQL:
select * from ladok.kurs
where
(kod like 'XX'
and benamns like ''
)
Is this expected behaviour or have I misunderstood the docs? I can get
around this problem by doing something like this (notice the op tag and the
extra ",'%')" string at the end of each sqltest line) :
dtml-sqltest kurs_kod column="kod"
op="like nvl(" type="string" optional, '%')
which renders the following SQL (the "%" is the Oracle wildcard operator):
select * from ladok.kurs
where
(kod like nvl( 'XX', '%')
and benamns like nvl( '', '%')
)
however, i'd much rather that it didn't render the null variables at all.
If this is known behaviour then the examples in Chapter 10
Any help appreciated. I searched the archives but didn't find any answers,
TIA,
/dario
-
Dario Lopez-Kästen Systems Developer Chalmers Univ. of Technology
[EMAIL PROTECTED] ICQ will yield no hitsIT Systems Services
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