Opened 6 months ago
Closed 6 months ago
#35433 closed Bug (wontfix)
NumberInput min_value attr overridden by IntegerField.widget_attrs
Reported by: | mitch99 | Owned by: | nobody |
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Component: | Forms | Version: | 5.0 |
Severity: | Normal | Keywords: | |
Cc: | Triage Stage: | Unreviewed | |
Has patch: | no | Needs documentation: | no |
Needs tests: | no | Patch needs improvement: | no |
Easy pickings: | no | UI/UX: | no |
Description
Given this:
widgets = { "weight": forms.NumberInput(attrs={'type':'range', 'step': '1', 'min': '1', 'max': '5'), }
I expect the min value on the range input to be 1, but it's actually 0:
<input type="range" name="form-2-weight" value="3" step="1" min="0" max="5" aria-describedby="id_form-2-weight_helptext" id="id_form-2-weight">
Change History (7)
comment:1 by , 6 months ago
Resolution: | → needsinfo |
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Status: | new → closed |
comment:2 by , 6 months ago
Please see below:
class ContentProfileDefinitionForm(forms.ModelForm): class Meta: model = ContentProfileDefinition fields = ["other", "weight"] widgets = { "weight": forms.NumberInput( attrs={ "type": "range", "step": "1", "min": "1", "max": "5", } ), } validators = { "weight": [ MinValueValidator(1), MaxValueValidator(5), ] }
class ContentProfileDefinition(models.Model): other = models.ForeignKey("Other", on_delete=models.CASCADE) weight = models.PositiveSmallIntegerField( default=1, help_text="Weight", validators=[ MinValueValidator(1), MaxValueValidator(5), ], )
comment:3 by , 6 months ago
Resolution: | needsinfo |
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Status: | closed → new |
Managed to reopen this ticket
comment:4 by , 6 months ago
Strangely it's not an off-by-one. It seems the min value is ignored and always set to 0.
comment:5 by , 6 months ago
Easy pickings: | unset |
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Summary: | NumberInput off-by-one on min value for type range → NumberInput min_value attr overridden by IntegerField.widget_attrs |
The root cause is that Field.__init__()
overrides a widget's attrs with Field.widget_attrs
which includes min_value=0
from PositiveIntegerField.formfield().
I'm not sure if we should change the behavior. The most appropriate fix for your use case might be to subclass PositiveIntegerField
and override formfield()
to set min_value=1
.
comment:6 by , 6 months ago
Yup what Tim said: There will be people relying on this existing behaviour 👍
Another way to get min="1"
is to use django-widget-tweaks: https://github.com/jazzband/django-widget-tweaks I just tested it out and it works 👍
comment:7 by , 6 months ago
Resolution: | → wontfix |
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Status: | new → closed |
OK thanks I'll try these approaches.
This is missing information to determine whether this is a bug or not, I need to see the how the form is defined and how the field weight is defined on the model.