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From "Mike Dickson" <mikedick...@yahoo.com>
Subject RE: Database Insert Across Multiple Tables
Date Fri, 30 Apr 2004 18:01:07 GMT
<mode name="request-param" type="request"/> means that there is a param
named request?

> -----Original Message-----
> From: Christian Haul [mailto:haul@informatik.tu-darmstadt.de]
> Sent: Tuesday, April 27, 2004 3:08 PM
> To: users@cocoon.apache.org
> Subject: Re: Database Insert Across Multiple Tables
>
>
> Mike Dickson wrote:
> > When you hit the "new user" button in the Modular Database
> Actions demo
> > application it does a GET with the user info and the group
> info.  Why are
> > only the user data listed below as params?  Shouldn't the
> group data be also
> > listed as params?
>
> Oh well, this is only a guard -- a condition that protects the
> invocation of the insert with a check that the most important
> attributes
> are present. The add action reads the data directly from the request.
>
> > In other words, how are the group params being passed in?
>
> Please have a look at the descriptor.xml (I've removed the comments):
>
>     <table name="user_groups">
>        <keys>
>           <key name="uid" type="int">
>              <mode name="request-param" type="request"/>
>              <mode name="request-attr" type="attrib">
>
> <parameter>org.apache.cocoon.components.modules.output.OutputM
> odule:user.uid[0]</parameter>
>              </mode>
>           </key>
>           <key name="gid" type="int" set="master">
>              <mode name="request-param" type="all"/>
>           </key>
>        </keys>
>     </table>
>
> There are two <mode/> declarations for the UID column. The
> second is the
> one you may care about: It accesses a request attribute instead of a
> request parameter. The attribute will be set by the preceeding insert
> to the users table! This is necessary, since the UID is a
> autoincrement
> column and the value is known only after the insert.
>
> However, the "GID" data is read from a request parameter
> again (because
> it has been entered by the user on the form).
>
> 	Chris.
>
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