Ability to set enctype="multipart/form-data" on custom CP forms

[lindseydiloreto]

We've got a custom plugin which has several back-end pages. On one of these pages, we've created a small form which allows admins to send short messages.

Recently, I've been asked to add attachments to this form. It nearly works perfectly, with only one shortcoming... the form is missing the enctype="multipart/form-data" attribute.

Like most back-end pages, this page extends _layouts/cp. We're using the fullPageForm = true variable to denote that the entire page should behave as a single form. Here is the Craft code which opens the form tag...

<form id="container" method="post" accept-charset="UTF-8" ... >

You'll notice that enctype="multipart/form-data" is conspicuously absent (as it should be for 99% of back-end forms). Unfortunately, this is one of the rare cases where we need that attribute to exist.

Feature Request

Just as we have a fullPageForm variable, could we also have an allowUploads variable?

{% set fullPageForm = true %}
{% set allowUploads = true %}

That would be sweet!

Internally, Craft would simply apply enctype="multipart/form-data" according to whether or not allowUploads is set to true.

Thanks guys! Let me know if you need any clarification! :)

Additional info

• Craft version: 2.6.2968

[lindseydiloreto]

FWIW, I've hacked my local copy to allow this. But hacking the core is obviously not a good long-term solution.

[brandonkelly]

Took it in a different direction, but the next release has a change that will make this possible: All of the #container HTML attributes are now defined in a containerAttributes block, so you can do this from your sub-template:

{% block containerAttributes -%}
    {{ parent() }} enctype="multipart/form-data"
{%- endblock %}

[lindseydiloreto]

Brilliant! Thanks Brandon!

[lindseydiloreto]

Just implemented this... works perfectly. 👍

[matt-adigital]

Does this still exist in Craft 3? Just tried it and it didn't seem to work. Can this functionality be re added please so I can create a form within a cp section which submits files, e.g. screenshots of an issue. Thank you.

[brandonkelly]

@matt-adigital Yeah looks like that never made it to Craft 3. Just added a new mainFormAttributes block to _layouts/cp.html for the next release.