2 from django.db import models
3 from django.forms.models import model_to_dict
4 from django.core.urlresolvers import reverse
5 from django.forms.models import model_to_dict
8 # This is a no-op if observer_disabled is set to 1 in the config file
11 print "import of observer failed! printing traceback and disabling observer:"
15 # guard against something failing
16 def notify_observer():
19 class PlCoreBaseManager(models.Manager):
20 def get_query_set(self):
21 return super(PlCoreBaseManager, self).get_query_set().filter(deleted=False)
23 class PlCoreBase(models.Model):
24 objects = PlCoreBaseManager()
25 created = models.DateTimeField(auto_now_add=True)
26 updated = models.DateTimeField(auto_now=True)
27 enacted = models.DateTimeField(null=True, default=None)
28 backend_status = models.CharField(max_length=140,
29 default="Provisioning in progress")
30 deleted = models.BooleanField(default=False)
36 def __init__(self, *args, **kwargs):
37 super(PlCoreBase, self).__init__(*args, **kwargs)
38 self.__initial = self._dict
44 diffs = [(k, (v, d2[k])) for k, v in d1.items() if v != d2[k]]
48 def has_changed(self):
49 return bool(self.diff)
52 def changed_fields(self):
53 return self.diff.keys()
55 def get_field_diff(self, field_name):
56 return self.diff.get(field_name, None)
58 def can_update(self, user):
65 def delete(self, *args, **kwds):
66 # so we have something to give the observer
68 model_dict = model_to_dict(self)
69 for (k,v) in model_dict.items():
70 # things like datetime are not JSON serializable
71 model_dict[k] = str(v)
73 super(PlCoreBase, self).delete(*args, **kwds)
75 # This is a no-op if observer_disabled is set
76 notify_observer(model=self, delete=True, pk=pk, model_dict=model_dict)
78 def save(self, *args, **kwargs):
79 super(PlCoreBase, self).save(*args, **kwargs)
81 # This is a no-op if observer_disabled is set
84 self.__initial = self._dict
86 def save_by_user(self, user, *args, **kwds):
87 if self.can_update(user):
88 self.save(*args, **kwds)
90 def delete_by_user(self, user, *args, **kwds):
91 if self.can_update(user):
92 self.delete(*args, **kwds)
96 return model_to_dict(self, fields=[field.name for field in