Strange error when uploading an invalid file into a required file/image field [#2719317]

When I attempt to upload a file into a required file or image field whose extension isn't in the list of allowed extensions I get the following error:

The specified file views.view_.content.yml could not be uploaded.
Only files with the following extensions are allowed: png gif jpg jpeg.
This value should not be null.

The odd thing is the last part: "This value should not be null."

Screenshot of error message

Comment	File	Size	Author
#9	Screenshot 2020-06-11 09.16.13.png	26.26 KB	pameeela
	drupal-8-image-upload-invalid-ext.png	16.89 KB	rooby

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Comments

Comment #1

5 May 2016 at 06:57

rooby created an issue. See original summary.

Comment #2

ajalan065 CreditAttribution: ajalan065 at Google Summer of Code commented 5 May 2016 at 07:06

IMHO, this field is a required one, and when we upload a file with the unacceptable extension and submit the form. The validation discards the file uploaded, resulting this field to attain null value, hence this error.
Please correct me if I am wrong.

Comment #3

mondrake

🇮🇹

CreditAttribution: mondrake as a volunteer commented 5 May 2016 at 07:12

Comment #4

rooby CreditAttribution: rooby commented 5 May 2016 at 07:15

Title:	Strange error when uploading an invalid file into an image field	» Strange error when uploading an invalid file into a required image field
Issue summary:	View changes

I can confirm that if I make the field optional then the last part of the message ("This value should not be null.") is no longer there.

Comment #5

rooby CreditAttribution: rooby commented 5 May 2016 at 07:19

Title:	Strange error when uploading an invalid file into a required image field	» Strange error when uploading an invalid file into a required file/image field
Issue summary:	View changes

This also happens for required file fields.

Comment #6

ajalan065 CreditAttribution: ajalan065 at Google Summer of Code commented 5 May 2016 at 07:22

This shows that the required field has NOT NULL attribute in the database as is in most of the cases.

Comment #7

dhiraj bhagat CreditAttribution: dhiraj bhagat as a volunteer and commented 2 January 2020 at 16:31

Have you fixed this issue I am getting same issue. I am unable to upload any file.

Comment #8

david.fcondezo CreditAttribution: david.fcondezo as a volunteer commented 26 March 2020 at 22:59

Did anybody find a solution for this?

Comment #9

pameeela CreditAttribution: pameeela commented 10 June 2020 at 23:20

Version:

8.1.1

» 10.0.x-dev

File	Size
Screenshot 2020-06-11 09.16.13.png	26.26 KB

I'm unable to reproduce this on 9.0.0. Screenshot attached, "This value should not be null." is no longer appearing.

@rooby, I'm going to close this as cannot reproduce given that it can't be reproduced any longer. I suspect it was fixed as a result of a change somewhere else, probably in #2377747: Incorrect node create validation error when an invalid image is attached to a field.

If anyone else is still able to produce this error, please re-open this ticket with complete steps to reproduce the issue (starting from "Install Drupal core"), document those steps in the issue summary and set the issue status back to "Active".