Array parameter, empty by default

Question

I want to pass an optional array parameter to a function. If the parameter is not provided, the array should be empty. I tried the following:

<cfargument name="time_blocks" type="array" required="false" default="[]">

But I get the following error:

invalid call of the function CreateRateBlock
14th Argument (time_blocks) is of invalid type, can't cast String [] to a value of type [array]

I also tried this:

<cfargument name="time_blocks" type="array" required="false" default="">

In this case, the error is almost the same:

invalid call of the function CreateRateBlock
14th Argument (time_blocks) is of invalid type, can't cast String [] to a value of type [array]

I also tried removing the default attribute, but in that case the value of time_blocks is null. What am I doing wrong?

Have you tried with [] without quotes? – Tropicalista Jan 07 '15 at 20:09 — Tropicalista, Jan 07 '15 at 20:09

Henry · Accepted Answer · 2015-01-07T20:22:23.267

13

[] does not work because it is just a string of 2 chars "[]".

#[]# technically should work, but older CF is not smart enough. So use:

<cfargument name="time_blocks" type="array" required="false" default="#arrayNew(1)#">

edited Jan 07 '15 at 20:22

answered Jan 07 '15 at 20:07

Henry

1

`#[]#` works on cflive.net's CF 9 / Railo 4. ` ` – Regular Jo Jan 07 '15 at 20:11
1

Yeah I don't think that's been a problem since CF8, so unless they're running CF8 and actually *have* that problem, using `#[]#` is a better answer, I think – Adam Cameron Jan 08 '15 at 07:08

score 7 · Answer 2 · answered Jan 07 '15 at 20:07

7

Change [] to #[]#. You're currently trying to give it the literal value "[]".

answered Jan 07 '15 at 20:07

Regular Jo

2 Answers2