OrderingFilter widget select multiple

[tamhv]

I'm trying to use OrderingFilter, it says "Multiple values may be separated by commas." but users can't pick multiple

class MyFilter(django_filters.FilterSet):
o = django_filters.OrderingFilter(
        fields=(
            ('pk', 'pk'),
            ('first_name', 'first_name'),
            ('email', 'email')
        ),
        field_labels={
            'pk': 'ID',
            'first_name': 'First name',
            'email': 'Email'
        },
    )

I try to override widget `widget=forms.SelectMultiple` but it doesn't work

'list' object has no attribute 'split'

[rpkilby]

Hi @tamhv. Sorry, the help text is a little misleading here. The quick answer is that you may just want to simply disable the help_text. I'm opening a PR that does this.

The longer answer is that OrderingFilter inherits from BaseCSVFilter and can accept multiple values separated by commas (eg, ?o=pk,first_name). However, this value isn't possible to create with standard HTML select widgets. You would need to have client code that constructed this value for you.

It's also worth noting that SelectMultiple doesn't work here, given that the widget is unable to retain selection order.