Issue with multiple file validation

[robscott95]

Hey, I'm having trouble with validating a wtforms.MultipleFileField field.

Creating a form field like so:
not_important = wtforms.MultipleFileField("Multiple file test",[FileRequired("File required"), FileAllowed(['csv'], ".csv file required")]) doesn't really work. After passing one or more files to the respective field, the validation returns "File required" error.
But the multi-dict of request.files shows that all files are read correctly.
Sample:
ImmutableMultiDict([('not_important', <FileStorage: 'Headline_all_test.csv' ('application/vnd.ms-excel')>)]

So basically the issue is - flask requests reads files passed, but the form.validate_on_submit() errors out telling me, that no file has been passed.

BTW - found this fresh SO thread pertaining to the same issue: https://stackoverflow.com/questions/59734277/filerequiredvalidator-doesnt-work-when-using-multiplefilefield-in-my-form

[HenriqueLin]

I think there is already an issue #337 about this problem and also a PR #338 by @greyli to solve this, but some how hasn't been merged yet. 😢

[snunzi]

I'm having the same issue, any work around?

[HenriqueLin]

I'm having the same issue, any work around?

I think you can create your own field and validation by copy the code from PR #338.

[greyli]

I will try to implement what David recommended late this month as an alternative to #338.

[khanfarhan10]

We really need this feature in flask wtforms, Any updates as to potentially when this could be updated please?

@greyli @HenriqueLin @robscott95

[azmeuk]

Fix released in v1.2.0