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Working in D8, I am trying to insert a form into an already created page/template file.

I am using webforms, and on the webform submission page (that lists the submission details), I am trying to insert a custom form to do some additional stuff. I already have the form generated, but I cannot find the correct way to insert the form into the template/page.

I tried using \Drupal::formBuilder()->getForm(form_name) in the twig template where I wanted it, but Drupal didn't like that.

I then tried to use hook_page_bottom and hook_page_top, but that quite literally attaches it to the very top of the page, or very bottom of the page (outside of the bounds of the theme/template), not where I want it to be.

I am already overriding the template using the naming convention webform-submission--webform-machine-name.html.twig.

I am assuming since you can override the default templates for webform submissions, that the webform module implements hook_theme or some other similar hook. Is there a way I can hook into this hook and pass the form off as a variable, then just render it in the actual template using {{ form }}, or do I need to create my own override and pass both the submission data and the form data into it?

I miss the days when I could just use $form = drupal_get_form(); and print render($form); inside of the template exactly where I wanted it.

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  • Thank you for the cleanup.
    – Ex0r
    Jul 4, 2020 at 0:38
  • There is a webform reference field for content types, and you can also add this field to a custom block type. Is there a reason this may not be a good approach for you? Is your custom form not a webform? Jul 4, 2020 at 2:59
  • Correct. It's a module created form that is generated programmatically. I could make the form a block on the page, but then I'm not able to stick it specifically where I want it on the page and it'll place it either above or below the content on the page. There's a specific place in the content it needs to live.
    – Ex0r
    Jul 4, 2020 at 9:30
  • Related: drupal.stackexchange.com/questions/231200/…
    – sonfd
    Jul 4, 2020 at 10:46
  • This isn't a related question. I'm not trying to render a webform in a page, I'm trying to render a programmatically built form inside of a different programmatically built page. I can't render the form directly in the twig template so I'm looking for another way to do it.
    – Ex0r
    Jul 4, 2020 at 11:59

1 Answer 1

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I was able to resolve this myself using template_preprocess() and generating the form from there

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