How to upload from CKAN package form

[brianacowles]

Hello 👋, sorry if this question has been asked before, but I'm having some trouble finding answers online. I'm trying to add an upload field (similar to the one on the group form or add resource page) to the package form to support package thumbnails. I have:

• successfully modified the package schema to include a new field for the thumbnail
• added the upload snippet to my package_basic_fields.html file in templates:

{{ form.image_upload(data, errors, field_url='url', field_upload='upload', field_clear='clear_upload',
is_upload_enabled=h.uploads_enabled(), is_url=data.url and not is_upload, is_upload=is_upload,
upload_label=_('Thumbnail:'), url_label=_('Thumbnail:'), placeholder=_('http://example.com/image.png'),
field_name='thumbnail') }}

This actually allowed me to set urls as the thumbnail successfully, but I can't figure out how implement the upload functionality. I essentially want to call the same code used for the group thumbnails and store the image in the CKAN filestore. I've confirmed that filestore is configured correctly.

So far, I've tried to call the Filestore API from some javascript code (this fails as I can't find a way to obtain the package_id to send the API). I also tried calling the API from my plugin.py file in an implementation of the validate() method from IDataSetForm. This 1. doesn't seem like the proper place to do that and 2. doesn't let me access the uploaded file to send to the API anyway.

If possible, I'd ideally like to mimic the group upload functionality, but I can't tell how the upload code is called from the group page. I'd really appreciate any advice on how to go about this. Thank you!