Comments on: cfqueryparam and conditional handling of NULL’s

By: Michael Sharman

Michael Sharman — Tue, 27 Sep 2011 21:21:18 +0000

@Belden – yep, this is one of the tricky things if you’re testing for specific “types” in your arguments. There are many many ways to handle this.

Things like just use a string “type” in your function cfargument so the default doesn’t fail. This certainly doesn’t feel like the best, but you can provide validation if needed inside the function.

People also use “-1″ as a default, then you could test for len(trim()) as well as “-1″ etc.

In this scenario I’d rather have done all my argument checking (from the client) before calling a persistence method (i.e. something saving to the database). Likely a layer up in a Service/Manager etc

By: Belden

Belden — Mon, 26 Sep 2011 18:00:12 +0000

Is there a way to still use the “default” attribute for the “cfargument” tag if the form variable you were using were passed in as an argument into a function for the query? I think you might get an error if you tried to make a default of any empty string if the argument you were passing in were an integer, as in the example.

By: Nikos

Nikos — Thu, 10 Dec 2009 11:01:12 +0000

so this is the best way for all datatypes?

null=”#NOT structKeyExists(arguments, ‘age’)#

By: Brad

Brad — Mon, 12 Oct 2009 06:17:34 +0000

I ran into same situation and found this post. Thanks a million this was exactly what I was looking for.

cheer!

By: jDowdle.com » Blog Archive » cfqueryparam, NULLs and Lists

jDowdle.com » Blog Archive » cfqueryparam, NULLs and Lists — Wed, 17 Sep 2008 16:39:19 +0000

[...] Links: cfqueryparam and conditional handling of NULL’s [...]

By: Michael Sharman

Michael Sharman — Sat, 21 Jun 2008 01:20:48 +0000

@Eric – This would indeed work for varchars, not sure what went wrong for you. Do you have a code sample?

For radio buttons you could replace len(trim()) with isDefined(“myRadioButton”)

Hope that helps.

By: Eric Smith

Eric Smith — Fri, 20 Jun 2008 19:22:16 +0000

You also need to mention that this is not for radio boxes. Spent a good deal of time finding this out the hard way.

Thanks,
Eric

By: Eric Smith

Eric Smith — Fri, 20 Jun 2008 14:44:20 +0000

Will this work for a varchar field also? I tried using your example and just replaced your field name and the data type and it’s not working.

Thanks,
Eric

By: Michael Sharman

Michael Sharman — Thu, 13 Mar 2008 03:22:55 +0000

@Tracy – Yep, the last example in the post details that.

There was a problem with the syntax highlighter I was using so I don’t think it was displaying correctly.

I’ve removed the highlighter for the last example and just left it bold.

Thanks

By: Tracy Logan

Tracy Logan — Wed, 12 Mar 2008 16:34:42 +0000

Note that (at least with CF8), there’s no need for using YesNoFormat() — like all other CF tag attributes that expect a boolean value, all the usual CF booleans will suffice (0/1, no/yes, true/false). So a simple …null=”#NOT structKeyExists(arguments, ‘age’)#”… will do the trick. I would expect this to be true of all CF versions, but only have CF8 ready to hand.