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# -*- coding: utf-8 -*- |
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__version__ = '0.1.0' |
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from django.contrib.admin import SimpleListFilter |
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from django.utils.translation import ugettext_lazy as _ |
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def isnull_filter(field_name, filter_title=None): |
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class HasRelatedFieldFilter(SimpleListFilter): |
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parameter_name = '%s__isnull' % field_name |
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related_field = field_name |
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def __init__(self, request, field, model, model_admin): |
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related_field = model._meta.get_field(field_name) |
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if filter_title: |
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self.title = filter_title |
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else: |
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if hasattr(related_field, 'related'): |
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related_title = related_field.related.model._meta.verbose_name_plural |
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self.title = _("Is related '%s' null?") % related_title |
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elif hasattr(related_field, 'related_model') and hasattr(related_field.related_model, "_meta"): |
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related_title = related_field.related_model._meta.verbose_name_plural |
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self.title = _("Is related '%s' null?") % related_title |
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else: |
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related_title = related_field.name |
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self.title = _("Is field '%s' null?") % related_title |
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super(HasRelatedFieldFilter, self).__init__(request, field, model, model_admin) |
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def lookups(self, request, model_admin): |
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return [ |
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('true', _('True')), |
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('false', _('False')), |
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] |
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def queryset(self, request, queryset): |
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kwargs = {} |
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if self.value() in ('false', 'False'): |
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kwargs["%s__isnull" % self.related_field] = False |
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if self.value() in ('true', 'True'): |
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kwargs["%s__isnull" % self.related_field] = True |
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return queryset.filter(**kwargs).distinct() |
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return HasRelatedFieldFilter |
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mauler /
meeting
