Hi there,
Incredible library and super easy to use. Very Djangonic/Pythonic.
One use case I have is filtering by date or date not being set. Now, this can easily be done with the meta syntax:
class Meta:
model = models.Widget
fields = {
'approved_at': ['exact', 'gte', 'lte', 'isnull'],
}
But that technically creates three filters. For doing that with one filter, you can currently use DateFromToRangeFilter, but you lose the "is not set" functionality. I find using one filter to be more idiomatic, specially if you are generating a UI from it and want just one widget.
So I wrote this crude first pass:
class NullableRangeWidget(django_filters.widgets.RangeWidget):
def __init__(self, attrs=None):
widgets = (forms.TextInput, forms.TextInput, forms.NullBooleanSelect)
forms.MultiWidget.__init__(self, widgets, attrs)
class NullableDateRangeField(django_filters.fields.RangeField):
widget = NullableRangeWidget
def __init__(self, *args, **kwargs):
fields = (
forms.DateField(),
forms.DateField(),
forms.BooleanField())
super(NullableDateRangeField, self).__init__(fields, *args, **kwargs)
def compress(self, data_list):
if data_list:
start_date, stop_date, is_null = data_list
if is_null:
return 'MAGIC'
else:
return super(NullableDateRangeField, self).compress([start_date, stop_date])
return None
class NullableDateRangeFilter(django_filters.filters.RangeFilter):
field_class = NullableDateRangeField
def filter(self, qs, value):
if value == 'MAGIC':
lookup = '%s__isnull' % self.name
return self.get_method(qs)(**{lookup: True})
return super(NullableDateRangeFilter, self).filter(qs, value)
Any interest in something like this? So now you can say "approved_at" is not set.
Let me know and I'd be happy to clean it up and make a PR. I'd also need some suggestions on how to use a magic value to trigger the null check (as None is not usable).
Best,
Silvio
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