How verify if a attribute exists in a object?
I create a object.
SET nlsoref=##class(%SYS.NLS.Locale).%New()So I want to verify if the attribute 'test' exists in the object, I tryied use $data
write $data(nlsoref.test)
But show this message:
<PROPERTY DOES NOT EXIST> *test,%SYS.NLS.LocaleSomeone can help?
Best regards, Flávio.
Use oList.%IsDefined("Language")
You changed the question, my answer was for a DynamicObject/Array.
For regular classes you use:
or just use a Try-Catch construct.
Sorry, I changed to be more clear, but don't solve my problem. This command show to me the error below:
<METHOD DOES NOT EXIST> *%IsDefined,%ZEN.proxyObjectHave you tried the %IsDefined method?
set a={}
if a.%IsDefined("test") write "defined"
set a.tset=1
if a.%IsDefined("test") write "defined"
I think Ben meant:
set a.test = 1I'd typically use:
$$$comMemberDefined("%SYS.NLS.Locale",$$$cCLASSproperty,"test")
By the looks of it, the original question applied $DATA to an element of the %DynamicAbstractObject classes. The $DATA and $GET functions can only be applied to Multidimensional variables. All ObjectScript local and global variables are Multidimensional. By default a property variable of a class object is not multidimensional unless the property default is over ridden with the [ Multidimensional ] attribute. The %DynamicAbstractObject classes provide no way of supporting elements which are Multidimensional. If dynobj is an object reference to a %DynamicObject then dynobj.%Get(key) is defined for all possible string values of 'key'. If dynobj.%GetTypeOf(key) returns "unassigned", or "null", then dynobj.%Get(key) will return the empty string value.
Currently, $DATA(dynobj.keyname) signals <PROPERTY DOES NOT EXIST> which is what is signaled for by all classes if the Property 'keyname' does not exist. In a future IRIS release it will report
<INVALID CLASS> *Class '%Library.DynamicObject' does not support MultiDimensional operations
The correct way to see if keyname "test" exists in a %DynamicObject is to evaluate (dynobj.%GetTypeOf("test") '= "undefined") .