Value not set for custom dimension.

[vicente_peris]

Hi,

I have a javascript code extensión with a reference to utag_data for a custom dimensión mapped in the Google Universal Analytics' Tag. But when the value is 0 (or false), the Custom Dimension doesn’t appear at the GA hit.

Create new data source (UDO variable - cd_test4) -> Map the new var to GUA tag dimension4 -> Create Javascript Code Extension:

function test(){
 if (something){
   return true;
 }else{
   return false;
  }
}
b.cd_test4 = test();

when "something" is false, the cd4 doesn't appear at the GA hit, when "something" is true, cd4=1;

(Sorry, I don't find the option to attach an image in this formulary).

Is this behaviour correct or am I missing anything?

[Mauricio]

Hi @vicente_peris,

This is the expected behavior. UDO params should not be falsy (except for an "". That is okay).

If you want to pass in value of 0 then you should convert it to the string "0" that is not a falsy value.

To assert the truthiness of the value in the devtools you can do:

var test = function(value) {
  return value ? true:false;
}

test(0) // false
test('0') // true

[adrian_browning]

@vicente_peris Just to carry on from what @Mauricio has said.

In all templates (as long as they are up-to-date) they have been changed to to no longer use the falsey check. They now use this:

if (b[d] !== undefined && b[d] !== "") {

 This is basically saying that everything expect undefined and empty strings are allowed to be sent through to the tag template.

 I think it might be worth raising a support ticket at https://community.tealiumiq.com/t5/custom/page/page-id/support-contact-form
Then we can walk through with you and work out what is happening.

Adrian

[Mauricio]

Carrying on to what @adrian_browning is saying:

The problem is not mapping in a falsy value but setting one using the tag template.  From the tag template

// from u.all function
// a wrapper for setting values on all trackers (you can initialize more than one using the tiq interface)

else if (v) {
    u.o(tracker_name + e, o, v);
}

v here would be the value 0. and would not be set.

[vicente_peris]

Hi Mauricio and Adrian,

Thank you for your quick response.

Best