empty_label not displayed for ModelSelect2MultipleWidget

[rez0n]

Describe the bug
Hi @codingjoe
I assume it is something related to this issue.
empty_label is not displays for the ModelSelect2MultipleWidget on page loads, but if I select one of options and then clear selection it gonna showed.

Code Snippet

field_name = forms.ModelChoiceField(
        required=False,
        blank=True,
        queryset=Organisation.objects.all(),
        widget=OrganisationsPickWidget(
            attrs={
                'class': 'form-control',
                'data-minimum-input-length': 0,
            },
        ),
    )

def __init__(self, *args, **kwargs):
    super().__init__(*args, **kwargs)
    self.fields['field_name'].empty_label = 'empty_label text'

Screenshots

Open.

Select.

Cleared selection

Thanks in advance.

[codingjoe]

Hi @rez0n,

Interesting. Yes, I believe you are right, that doesn't work right now. Select2 doesn't really support empty options, since it'll be simply empty. However, you could use the placeholder, right? I actually don't know how Django handles the empty label on a native multiple select.

@rez0n, as a frequent contributor and sponsor, do you want to contribute this yourself? Or do you want me to take a swing?

Cheers,
Joe