XML is typicaly there for storage of information in a homogenous way.
John's suggestion of WDDX makes short hand of CFML constructs and is
adaptable to JS and XML format.
XML is used for configuration files, datasources and webservices just as a
couple of examples.
A lot of Flex examples use XML as a way to have a datasource for demo code
without needing a remote call.
If the test is for demo only, XML datasources work nicely.
Teddy
On 1/2/07, [EMAIL PROTECTED] <
[EMAIL PROTECTED]> wrote:
For this project, a) I'm learning it, b) figured it would be easier to
deal with than creating a database and dealing with the ISP. But for
another project, I'm looking at using it for faking that a prototype is
working for demo purposes - namely because the database is REALLY complex.
mcg
*"Chris C. Cooper" <[EMAIL PROTECTED]>*
Sent by: [EMAIL PROTECTED]
01/02/2007 08:40 AM Please respond to
discussion@acfug.org
To
discussion@acfug.org cc
Subject
RE: [ACFUG Discuss] XML & CF
What is a practical use for XML? What kind of situation would call for
using it?
------------------------------
*From:* [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] *On Behalf Of *Andrew
Powell*
Sent:* Monday, January 01, 2007 8:54 PM*
To:* [EMAIL PROTECTED]
Subject:* Re: [ACFUG Discuss] XML & CF
Also, I would suggest Jeff Peters' book on the CF XML Object:
*http://www.cafepress.com/protonarts.50984013*<http://www.cafepress.com/protonarts.50984013>
ap
On Jan 1, 2007, at 8:31 PM, Andrew Powell wrote:
1. Read the XML file with CFFILE
2. Parse the xml string with xmlParse()
--optional, but recommended-- narrow your XML document down to an array of
of your data elements using xmlSearch() and the xPath to your data
3. loop over data and do what you will with it (conditionals to check,
etc.)
4. write it back to the server or whatever storage space you are using
(database, etc.)
As far as writing back the whole XML doc, that may be a matter of *not*using
xmlSearch() and working with the whole document instead. I'm not sure
if xmlSearch() returns its array by reference or by value. Someone else may
be able to clear this up. In the livedocs someone says that searches on the
same XML doc *are NOT thread-safe within a shared scope*. This leads me to
think that the array returned by xmlSearch() is returned is a reference to
the original xml doc. If that is the case, then you can just manipulate that
data in the array that xmlsearch() returns and then write the original xml
back to a string with changes intact. I would not write it to an array of
structs or a query if you're going to write back as XML to the server or
database. Just manipulate the original XML doc and save the processing of
conversion.
To write it back to the server, you just toString(myXMLObj) within your
CFFILE action="write" tag.
On Jan 1, 2007, at 8:12 PM, [EMAIL PROTECTED]<[EMAIL PROTECTED]>wrote:
I've not really worked with XML and CF. I've gotten some basics down, and
have looked, but am iffy on my logic.
-You read the XML file
-Read the length of the data from the XmlChildren array
-Loop over the parsed XML to put things into a query
-Output data or whatever
-Now to get a specific 'record', you do the same above, except putting an
if statement in your loop to add things your query (or select the specific
item in the query)
-To add/ modify/ delete things, you do whatever to the query, convert it
to XML (or modify the XML object itself) and then rewrite the XML file
This sounds cludgy to me, I've got to be missing something. What if you
have a large dataset (which I won't in this case)?
Thanks,
mcg
(Yes it's New Year's Day, but working on mom's website, and the USC - MICH
game isn't terribly interesting)
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