Re: Witango-Talk: @FILTER

[John McGowan]

I thought about that, but something inside of me told me not to 
bother... However, looking at it again, i think it might just work!

I'll try it out and let you know.

/John

Scott Cadillac wrote:

Hi John,

Try building the whole @FILTER Metatag dynamically as one big complete 
string using <@LITERAL>, then call the generated string with 
ENCODING=METAHTML, something like:

<@ASSIGN local$myCustomFilterMetatag VALUE="<@LITERAL 
VALUE='<@FILTER ...custom expr...>'>">

<@VAR local$myCustomFilterMetatag ENCODING=METAHTML>

Hope this helps. Cheers....

Scott Cadillac,
403-281-6090 ~ [EMAIL PROTECTED]
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-----Original Message-----
From: John McGowan <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Date: Thu, 11 Mar 2004 15:42:52 -0600
Subject: Re: Witango-Talk: @FILTER
 

Well, I figured out what my problem was...  (this time)

From the documentation...
Note References to columns inside the EXPR attribute cannot be 
specified by meta tags.

Well, I was most certianly specifying my colum references by a meta
tag...
I was doing the following...

<@assign
scope=Method
name=FilterExpression
value="(#11=<@var Method$DC_ProductID>) <@ifempty <@var 
Method$DC_minQuantity>><@else> && (#12>=<@var 
Method$DC_minQuantity>)</@if><@ifempty <@var 
Method$DC_maxQuantity>><@else> && (#12<=<@var 
Method$DC_maxQuantity>)</@if>">

<@assign scope=Method
name=Matches
value=<@filter array=Products
scope=Method
expr="<@var Method$FilterExpression>">>
As you'll see I only want to compare column #12 if the variables i'm 
comparing them to aren't empty.  However this is going to be
impossible, 
because there would be no way to conditionally compare to a given
column 
with the rule quoted from the docs above.

I think the only way I'm going to be able to do this is by doing 
multiple filters, each one filtering the results from the previous
filter.

/John

John McGowan wrote:

   

I don't have to use the @filter tag very often, but when I do, it's 
always a pain in the rear.

There's always seems to be something wrong with my filter expressions
that I can't see.
For example, right now i'm getting the following error.

-18 Error during expression evaluation. Illegal symbol in statement 
[(#11=1294) && (#12>=3)]

What could possibly be wrong with that expression?

/John

     

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