Re: XUpdate:how to replace a node

Hi,

> Hi,
>
> > Hi, I need to replace a given node in my database by a whole new node.
> > First, is the XUpdate documentation found on
> > http://xmldb-org.sourceforge.net/xupdate/xupdate-wd.html current
> > enough?
> >
> > Well, this documentation doesn't mention any replace functionality. So
> > I thought that I could just remove the node, and add the new node to
> > the parent, at the same position. Problem: in order to be able to
> > append the new node to the parent, I need to put a reference to the
> > parent in a variable before deleting the old node: my XPath to the
> > node is like //node[@id="2"], so I can easily find the parent before
> > deleting the node, but it is impossible afterwards.
>
> I first tried the approach using variables. However, this didn't work,
> basically because the declared variables were not visible from within the
> select. I have thus fixed the code, so the following code snippet
> does the
> job now (example taken from the corresponding junit test
> "src/org/exist/xupdate/test/modifications/variables.xml"):
>
> <xu:variable name="address" select="//address[lname = 'Hyde']"/>
> <xu:variable name="root" select="$address/.."/>
>
> <xu:remove select="$address"/>
> <xu:append select="$root">
>       <address>
>               <fname>Boris</fname>
>               <lname>Becker</lname>
>               <company>BB-Inc.</company>
>               <city>Leimen</city>
>       </address>
> </xu:append>
>
> However, I also added an experimental xupdate:replace command. The code
> differs only slightly from xupdate:update. Using xupdate:replace, you can
> directly do:
>
> <xu:replace select="//address[lname = 'Hyde']">
>       <address>
>               <fname>Boris</fname>
>               <lname>Becker</lname>
>               <company>BB-Inc.</company>
>               <city>Leimen</city>
>       </address>
> </xu:replace>
>
> which is definitely much simpler. You will find both changes in
> the current
> CVS or snapshot.
>
> Wolfgang

thanks for the fix,I need to use the variable within the select!
However I think there is an error in your first example because is not make
a true replace.It doesn't save the order of the child node removed and the
new node is inserted as last.It's possible to use the variables reference
within the child attribute of append?

Marco

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