topic Re: Email hide/show logic - blank field value not returning as blank in CMS Development

Email hide/show logic - blank field value not returning as blank

creedy — Fri, 15 Nov 2024 19:21:08 GMT

In a custom HTML email, I want to show/hide content based on a value within a field that has the internal name of "drupal_uid" in "Contacts".

Here's a super simple example:

{% if contact.drupal_uid %}

Content is hidden because DRUPAL_UID has a value.

{% else %}

Content is shown because DRUPAL_UID is blank or undefined

{% endif %}

I have 2 contacts I'm testing with - one has a value, one doesn't.

The problem is they are both returning "Content hidden" when the contact without a value should fall under the else statement "Content shown".

Any help would be appreciated.

Re: Blank field values not...blank?

creedy — Fri, 15 Nov 2024 19:14:05 GMT

I've verified the contact with no value has this for the field...

But the if/then thinks it has a value.

Re: Email hide/show logic - blank field value not returning as blank

creedy — Fri, 15 Nov 2024 22:08:46 GMT

More info: I can display the field value in a rendered email just fine, but it won't work in logic blocks.

Are fields with blank values actually not blank? Are there extra characters, white-space, etc?

Re: Blank field values not...blank?

Anton — Mon, 18 Nov 2024 07:35:00 GMT

Hey @creedy,

to my knowledge the simplified logic like

{% if X %} Do something if X is true {% else %} Do something if X is false/not true {% endif %}

is only behaving as a boolean(true/false).

Sometimes - especially with properties, you want to provide a bit more context like

{% if contact.drupal_uid != null %} Content is hidden because DRUPAL_UID has a value. {% else %} Content is shown because DRUPAL_UID is blank or undefined {% endif %}

or with a unless-statement(basically the same as an if-statement but the reversed)

{% unless contact.drupal_uid == "" %} Content is hidden because DRUPAL_UID has a value. {% else %} Content is shown because DRUPAL_UID is blank or undefined {% endunless %}

p.s. Do you have the "Programmable email module beta" feature enabled in the module?

best,

Anton

Re: Email hide/show logic - blank field value not returning as blank

creedy — Mon, 18 Nov 2024 23:06:56 GMT

Hey Anton,

Thanks for the examples,I really appreciate it! Unfortunately (luckily?), we will not be using the logic now...handling through automation tracks instead. But I'll definitely keep poking around on this as I'm sure it'll come up in the future.

We are using completely custom HTML for the email in Design Manager - no drag/drop, modules, etc.

Thanks again.