Change required state by checking checkbox

Joost

1/8/23, 10:34 PM

I have an image field and a checkbox in my node edit form. I want the image field to be required when the checkbox is not checked. And I want the image field to not be required when the checkbox is checked.

How can I do this?

1 + 3

leymannx

1/9/23, 8:33 AM

Does this answer your question: [How can I make a form element required with states?](https://drupal.stackexchange.com/q/14173/15055)

Joost

1/9/23, 1:22 PM

So using #states to make a field required is not possible. I should figure out a way to create my own validation. Thanks

leymannx

1/9/23, 3:17 PM

`#states` to make a field required is possible, and it's easy. But it requires JS, and validation will be done in the browser. If that works for you, because your whole site won't work without JS, cool. Alternatively you'd implement an `#element_validate` callback and do the validation in PHP. Depends a bit on how important the form and the requirement is.

Joost

1/13/23, 7:25 AM

@leymannx JS validation is fine for the use case I'm working on. But how can I make this work for an image field?

Score:1

Drupal

Ajay Reddy

1/9/23, 3:27 AM

For image field use #states, this will be making a field required based on the checkbox clicked or not. Check here for more information

'#states' => array(
  'required' => array(
    :input[name="NAME OF THE FIELD"]' => array('value' => 'VALUE OF FIELD'),
  ),
),

0 + 1

Joost

1/9/23, 4:42 AM

Thanks this already helped out a lot. I have one question though. At [this](https://www.drupal.org/docs/drupal-apis/form-api/conditional-form-fields#staterequired) part of the link you provided they say that required is a special case. There is an example of this for an auto complete field. But how do I target the actual input field of an image field?

Ajay Reddy

1/13/23, 4:49 AM

Can you add you form structure here (code) so that we can able to help you.

Joost

1/13/23, 7:27 AM

It's no more than a regular checkbox and a regular image field from Drupal core, added to a content type. What code part do you wish to see, the html?

Elon Musk

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

EN: Change required state by checking checkbox

TH: เปลี่ยนสถานะที่ต้องการโดยทำเครื่องหมายที่ช่องทำเครื่องหมาย

RO: Schimbați starea necesară bifând caseta de selectare

RU: Измените требуемое состояние, установив флажок

VI: Thay đổi trạng thái bắt buộc bằng cách chọn hộp kiểm

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