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From Paul Joseph <pjoseph...@yahoo.com>
Subject aggregate field with optional values
Date Tue, 28 Dec 2004 13:57:47 GMT
Hi,

I have a "simple" aggregate field made up of three
parts, and would like to make filling of any of these
parts optional to the user.

Since I would like the user to be able to type in
almost anything in each part, I have made the
separator a combination that they are fairly unlikely
to type.

My model is as follows:

<fd:aggregatefield id="requestaggregate"
required="false">
<fd:label/>
<fd:datatype base="string"/>
<fd:split pattern="(.*)?-_-(.*)?-_-(.*)?">
<fd:map group="1" field="part1"/>
<fd:map group="2" field="part2"/>
<fd:map group="3" field="part3"/>
</fd:split>
<fd:combine expression = 'Concat(part1, "-_-", part2,
"-_-", part3)'/>
<fd:widgets>
<fd:field id="part1" required="false">
<fd:datatype base="string"/>
</fd:field>
<fd:field id="part2" required="false">
<fd:datatype base="string"/>
</fd:field>
<fd:field id="part3" required="false">
<fd:datatype base="string"/>
</fd:field>
</fd:widgets>
</fd:aggregatefield>

I find that it either requires all the parts to be
filled or none of the parts. 

If I leave one part unfilled, then it will not save to
the database, because I think it is not passing some
validation even though I have requested no validation.

If I delete from the database any one of the parts,
then the form populates correctly, leading me to think
that the problem is not with the "split pattern" but
with the "combine expression" line:

<fd:combine expression = 'Concat(part1, "-_-", part2,
"-_-", part3)'/>

This does not appear to work/validate when part1 or
part2 or part3 is blank.

Any help would be much appreciated!

TIA
Paul

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