On onsdag 7. juli 2004, 18:41, Michael A Nachbaur wrote: > > But then, I need to test whether a parameter exists... In XSP > > that's straightforward, thanks to the many good taglibs, but I > > haven't found anything on checking the parameters in XSLT, is it > > doable? > > Well, the most common method I know of doing that is: > > <xsl:param name="foo" select="''"/>
Is that line really necessary....? > <xsl:if test="$foo = ''"> > <!-- Test to see if no value has been supplied --> > </xsl:if> > <xsl:if test="not($foo = '')"> > <!-- Test to see if a value has been supplied --> > </xsl:if> Yhm, yes of course... The reason why I first thought this was inadequate was that it checks for an empty string rather than a non-existant variable. Which would make a situation where I want to delete a string harder to work with. But since you say it, of course, the query parameters are not making that distinction, a parameter is passed on from a request even if the field wasn't given a value. Which means I would have to work around the around problem anyway. So thanks! > You can probably clean this up a bit by using named templates. > > <xsl:template name="param.foo"> > <xsl:choose> > <xsl:when test="$foo = ''"> > <xsl:value-of select="$foo"/> > </xsl:when> > <xsl:otherwise> > <xsl:value-of select="foo"/> > </xsl:otherwise> > </xsl:choose> > </xsl:template> Yup, nice! > > Is there more documentation on the parameters AxKit pass to XSLT > > somewhere now? I remembered an old thread about them and found it > > in the archives, but that was about all. > > IIRC, by default it adds the query string parameters supplied to the > URL, and any additional parameters added by any AxKit plugins that > are supplied. For instance, you can use one of the > Apache::AxKit::Plugin::AddXSLParams::* modules to put in additional > parameters as needed. Yup, but things like if a <xsl:param name="foo" select="''"/> "variable declaration" is really necessary is rather unclear... > Kip wrote a module to parse out the HTTP Request object and supply > detailed parameters for them (::Request) and I have a module that can > take values stored in your BasicSession and supply them to your > stylesheet. Yup! > > Kip, anything about that in your new book? It's in the mail on its > > way here... :-) > > Good choice! Its a really great book. I've been an AxKit regular > for a while now, and I've learned quite a few things in there. Good! > http://nachbaur.com/pgpkey.asc Uhm, you didn't get the new key right, but I'll take that in a private e-mail. :-) Best, Kjetil -- Kjetil Kjernsmo Astrophysicist/IT Consultant/Skeptic/Ski-orienteer/Orienteer/Mountaineer [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED] Homepage: http://www.kjetil.kjernsmo.net/ OpenPGP KeyID: 6A6A0BBC --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
