Score:0

Drupal

Check if a field is empty inside a twig paragraph template

Sébastien Gicquel

6/25/23, 11:17 AM

I know how to check if a field is empty in a twig template (example node--lorem.html.twig):

{% if node.field_lorem.value is not empty %}

    <p>not empty</p>

{% else %}  

    <p>empty</p>

{% endif %}

I would like to check if a field is not empty inside a paragraph twig template (example paragraph--lorem.html.twig). But this doesn't work :

{% if content.field_lorem.value is not empty %}

{% if node.field_lorem.value is not empty %}

I can display this field value like this :

{{ content.field_lorem }}

0 + 0

theming

paragraphs

Sébastien Gicquel

6/25/23, 12:07 PM

Why the downvote ? I could improve the question if I know why.

Hudri

6/25/23, 12:15 PM

[How do I get the raw field value in a twig template?](https://drupal.stackexchange.com/questions/228388/how-do-i-get-the-raw-field-value-in-a-twig-template) - Replace `node` with `paragraph`

Sébastien Gicquel

6/25/23, 12:41 PM

@Hudri No, I just want to check if a paragraph field is empty or not. I don't want to get the raw value.

leymannx

6/25/23, 12:49 PM

`{% if paragraph.field_lorem.value %}`, not `node`. Not `content`. `content` contains only fields that have been added to the display of your entity.

Sébastien Gicquel

6/25/23, 12:52 PM

@leymannx Thank you. It works perfectly. Can you post your answer ? I will accept it.

4uk4

6/25/23, 1:07 PM

I didn't downvote, but you could improve the question, because the example you are quoting doesn't match with the question title. You are relying on that the field value evaluates in true or false, which is not the same as the field being empty or not. For this you can use [isEmpty()](https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21TypedData%21Plugin%21DataType%21ItemList.php/function/ItemList%3A%3AisEmpty)

Sébastien Gicquel

6/25/23, 1:15 PM

@4k4 I understand. I thought `{% if node.field_lorem.value %}` was similar to `{% if node.field_lorem.value is not empty %}`. I changed the question, is it better?

4uk4

6/25/23, 1:20 PM

You don't need to get the field value first. You can check the field object itself and then this works for any field type, also for those not using the property name `value`. I've added a code example as answer.

Sébastien Gicquel

6/25/23, 1:28 PM

@4k4 Thanks very much. It is much clearer for me and I will be able to improve my code with your answer (I did not know `ItemList::isEmpty`).

Score:3

Drupal

4uk4

6/25/23, 1:19 PM

To check if a field is empty use ItemList::isEmpty

Node

{% if node.field_example.isempty %}
  <p>Field is empty</p>
{% endif %}

Paragraph

{% if paragraph.field_example.isempty %}
  <p>Field is empty</p>
{% endif %}

0 + 0

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Check if a field is empty inside a twig paragraph template

TH: ตรวจสอบว่าฟิลด์ว่างภายในเทมเพลตย่อหน้าทวิ

RO: Verificați dacă un câmp este gol în interiorul unui șablon de paragraf crenguță

RU: Проверьте, не пусто ли поле внутри шаблона абзаца ветки

VI: Kiểm tra xem một trường có trống bên trong mẫu đoạn văn nhánh không

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.