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40 lines
1.1 KiB
Python
40 lines
1.1 KiB
Python
from __future__ import unicode_literals
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from django.db import models
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from extras.models import ObjectChange
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from utilities.utils import serialize_object
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class ChangeLoggedModel(models.Model):
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"""
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An abstract model which adds fields to store the creation and last-updated times for an object. Both fields can be
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null to facilitate adding these fields to existing instances via a database migration.
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"""
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created = models.DateField(
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auto_now_add=True,
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blank=True,
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null=True
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)
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last_updated = models.DateTimeField(
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auto_now=True,
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blank=True,
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null=True
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)
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class Meta:
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abstract = True
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def log_change(self, user, request_id, action):
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"""
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Create a new ObjectChange representing a change made to this object. This will typically be called automatically
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by extras.middleware.ChangeLoggingMiddleware.
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"""
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ObjectChange(
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user=user,
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request_id=request_id,
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changed_object=self,
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action=action,
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object_data=serialize_object(self)
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).save()
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