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@@ -5,6 +5,7 @@ from io import StringIO
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import django_filters
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from django import forms
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+from django.conf import settings
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from django.forms.fields import JSONField as _JSONField, InvalidJSONInput
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from django.core.exceptions import MultipleObjectsReturned, ObjectDoesNotExist
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from django.db.models import Count
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@@ -355,7 +356,15 @@ class DynamicModelChoiceField(DynamicModelChoiceMixin, forms.ModelChoiceField):
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Override get_bound_field() to avoid pre-populating field choices with a SQL query. The field will be
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rendered only with choices set via bound data. Choices are populated on-demand via the APISelect widget.
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"""
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- pass
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+
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+ def clean(self, value):
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+ """
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+ When null option is enabled and "None" is sent as part of a form to be submitted, it is sent as the
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+ string 'null'. This will check for that condition and gracefully handle the conversion to a NoneType.
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+ """
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+ if self.null_option is not None and value == settings.FILTERS_NULL_CHOICE_VALUE:
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+ return None
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+ return super().clean(value)
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class DynamicModelMultipleChoiceField(DynamicModelChoiceMixin, forms.ModelMultipleChoiceField):
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Daniel Sheppard