36 lines
1.0 KiB
Python
36 lines
1.0 KiB
Python
"""
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A django mixin providing fields to store a signature captured
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with jSignature jQuery plugin
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"""
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from datetime import datetime
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from django.db import models
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from django.utils.translation import ugettext_lazy as _
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from .fields import JSignatureField
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class JSignatureFieldsMixin(models.Model):
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""" Mixin class providing fields to store a signature with jSignature """
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signature = JSignatureField(
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_('Signature'),
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blank=True,
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null=True)
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signature_date = models.DateTimeField(
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_('Signature date'),
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blank=True,
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null=True)
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class Meta:
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abstract = True
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def save(self, *args, **kwargs):
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is_new = self.pk is None
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original = not is_new and self.__class__.objects.get(pk=self.pk) or None
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if self.signature:
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if is_new or self.signature != original.signature:
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self.signature_date = datetime.now()
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else:
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self.signature_date = None
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super(JSignatureFieldsMixin, self).save()
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