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37 lines
1.4 KiB
37 lines
1.4 KiB
# This file is part of k4ever, a point-of-sale system
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# Contact............ <k4ever@lists.someserver.de>
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# Website............ http://k4ever.someserver.de/
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# Bug tracker........ http://k4ever.someserver.de/report
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#
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# Licensed under GNU Affero General Public License v3 or later
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# FIXME: this needs to be reimplemented (not compatible with django 1.10+)
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# https://docs.djangoproject.com/en/dev/ref/contrib/admin/#django.contrib.admin.ModelAdmin.list_filter
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# http://stackoverflow.com/a/10644089
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#from django.contrib.admin.filterspecs import FilterSpec, BooleanFieldFilterSpec
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#
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#class IsNegativeFilterSpec(FilterSpec):
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# """ Custom filter to display only users with negative balance """
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# def __init__(self, f, request, *args, **kwargs):
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# super(IsNegativeFilterSpec, self).__init__(f, request, *args, **kwargs)
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# self.lookup_kwarg = '%s__lt' % f.name
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# self.lookup_val = request.GET.get(self.lookup_kwarg, None) # Check if current request already has a filter
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#
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# def title(self):
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# return 'Kontostand'
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#
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# def choices(self, cl):
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# yield {
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# 'selected': self.lookup_val == None,
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# 'query_string': "?",
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# 'display': 'Alle'}
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# yield {
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# 'selected': self.lookup_val == '0',
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# 'query_string': cl.get_query_string(
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# {self.lookup_kwarg: 0},
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# ['balance__isnull']),
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# 'display': 'Nur Negative'}
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#
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#FilterSpec.filter_specs.insert(0, (lambda f: getattr(f, 'has_negative_filter', False), IsNegativeFilterSpec))
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