Comments on: Converting ColdFusion query to Javascript object

By: jeff

jeff — Wed, 10 Jun 2009 04:21:29 +0000

i want to be opposite the data transfer as convert passing variable data of Javascript to ColdFusion so do you know how to write programming code as possible as you know how to do it. if so , then please give me sample.
thank you

By: Steve Brownlee

Steve Brownlee — Tue, 09 Dec 2008 17:40:17 +0000

Hey there Cutter. I use JSON exclusively when returning queries from an AJAX call to a CFC. Couldn’t live without it. The way I use this function is not via an AJAX call, it’s invoked directly inside my views.

By: Steve 'Cutter' Blades

Steve 'Cutter' Blades — Tue, 09 Dec 2008 14:54:48 +0000

@Steve

I’ll set a function to return a struct. Each struct will contain two keys: success & query. Then, when making my Ajax request I’ll pass returnFormat:’JSON’ as one of the params. CF will automatially convert the query object (this is CF 8 only, CF 7 I’ll use the cfjson.cfc).

Since ColdFusion’s JSON return of query data is a bit non-standard, you may need a custom parser on the client-side. I like to move process to the client whenever I can, to distribute process load. I recently wrote a custom data reader for the Ext library to do just this:

http://blog.cutterscrossing.com/index.cfm/2008/11/20/ColdFusion-Query-Json-Data-Reader

By: Steve Brownlee

Steve Brownlee — Tue, 09 Dec 2008 12:00:48 +0000

@Todd Rafferty. Why is it an improvement?

By: Steve Brownlee

Steve Brownlee — Tue, 09 Dec 2008 11:56:16 +0000

@todd sharp. No I wouldn’t. For this particular application, all I need is simple Javascript objects. No real need for serialization.

By: Steve Brownlee

Steve Brownlee — Tue, 09 Dec 2008 11:54:16 +0000

@Sam. You are correct. In fact, I use the toScript() function in my component. Take a closer look. This is basically an abstraction of the toScript() function to add some customization of what the structure of the Javascript object will be.

By: Todd Rafferty

Todd Rafferty — Tue, 09 Dec 2008 11:30:15 +0000

Sam & Todd #2 beat me to my initial thoughts. Also, if you want to improve the script you have, don’t forget about cfsavecontent and cfhtmlhead – they’re lifesavers (instead of outputting directly via cfc).

By: todd sharp

todd sharp — Tue, 09 Dec 2008 02:21:50 +0000

Wouldn’t you rather have the query in JSON format?

By: Sam Farmer

Sam Farmer — Tue, 09 Dec 2008 02:04:12 +0000

Cool stuff but I think this CF function toScript does the same thing:

http://www.cfquickdocs.com/?getDoc=ToScript#ToScript