Requerido: true no aplicado para el campo de subida en plantillas de formulario

zogstrip · 23 Marzo, 2026 18:23

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github.com/discourse/discourse

FIX: Enforce `required` validation on form template upload field (#38799)

main ← fix/form-template-upload-required-validation

opened 06:23PM - 23 Mar 26 UTC

ZogStriP

+100 -2

The `required: true` validation on upload fields in form templates was not being… enforced. Users could submit forms without attaching any file even when the upload field was marked as required. The root cause is that the upload field used a `<input type="hidden">` to store its value. Hidden inputs are excluded from the browser's constraint validation API — `form.checkValidity()` skips them entirely. All other form template field types (input, textarea, dropdown, etc.) use visible form elements where the native `required` attribute works. The fix changes the hidden input to a visually-hidden `<input type="text">` so that native constraint validation applies. The input is positioned off-screen via CSS and made non-interactive with `tabindex="-1"` and `aria-hidden="true"`. It is also placed as the last child in the container so the validation error message (inserted via `insertAdjacentElement("afterend")`) renders in a visible location. A synthetic `input` event is dispatched after upload completion so the validation error clears once a file is attached. https://meta.discourse.org/t/398972

Tema		Respuestas	Vistas
'Upload Fails' error when using form templates Bug form-templates	9	539	13 Noviembre 2023
Hidden upload field is not hidden UX fixed	2	68	6 Agosto 2025
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Topic template cannot allow user to upload media, and the 3 lines at the top do nothing Support form-templates	3	318	24 Marzo 2024
Creating form templates Site Management form-templates	1	140	11 Marzo 2026

Requerido: true no aplicado para el campo de subida en plantillas de formulario

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