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cebc56e5cc
* Add background_job toggle to BulkEditForm * Account for bug fix in v4.3.4 * Enable background jobs for bulk edit & bulk delete * Move background_job field to a mixin * Cosmetic improvements * Misc cleanup * Fix BackgroundJobMixin
69 lines
2.1 KiB
Python
69 lines
2.1 KiB
Python
import time
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from decimal import Decimal
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from django import forms
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from django.core.validators import MaxValueValidator, MinValueValidator
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from django.utils.translation import gettext_lazy as _
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__all__ = (
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'BackgroundJobMixin',
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'CheckLastUpdatedMixin',
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'DistanceValidationMixin',
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)
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class BackgroundJobMixin(forms.Form):
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background_job = forms.BooleanField(
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label=_('Background job'),
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help_text=_("Execute this task via a background job"),
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required=False,
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)
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class CheckLastUpdatedMixin(forms.Form):
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"""
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Checks whether the object being saved has been updated since the form was initialized. If so, validation fails.
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This prevents a user from inadvertently overwriting any changes made to the object between when the form was
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initialized and when it was submitted.
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This validation does not apply to newly created objects, or if the `_init_time` field is not present in the form
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data.
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"""
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_init_time = forms.DecimalField(
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initial=time.time,
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required=False,
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widget=forms.HiddenInput()
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)
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def clean(self):
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super().clean()
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# Skip for absent or newly created instances
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if not self.instance or not self.instance.pk:
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return
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# Skip if a form init time has not been specified
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if not (form_init_time := self.cleaned_data.get('_init_time')):
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return
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# Skip if the object does not have a last_updated value
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if not (last_updated := getattr(self.instance, 'last_updated', None)):
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return
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# Check that the submitted initialization time is not earlier than the object's modification time
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if form_init_time < last_updated.timestamp():
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raise forms.ValidationError(_(
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"This object has been modified since the form was rendered. Please consult the object's change "
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"log for details."
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))
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class DistanceValidationMixin(forms.Form):
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distance = forms.DecimalField(
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required=False,
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validators=[
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MinValueValidator(Decimal(0)),
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MaxValueValidator(Decimal(100000)),
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]
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)
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