Source Code for Module camelot.camelot.model.memento

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27   
28  """Set of classes to keep track of changes to objects and 
29  be able to restore their state 
30  """ 
31   
32  from camelot.model import * 
33  from authentication import getCurrentPerson, Person 
34  __metadata__ = metadata 
35   
36  from camelot.view.elixir_admin import EntityAdmin 
37  import datetime 
38   
39 -class Memento(Entity): 
40    """Keeps information on the previous state of objects, to keep track 
41    of changes and enable restore to that previous state""" 
42    using_options(tablename='memento') 
43    model = Field(Unicode(256), index=True, required=True) 
44    primary_key = Field(INT(), index=True, required=True) 
45    creation_date = Field(DateTime(), default=datetime.datetime.now) 
46    person = ManyToOne('Person', required=True, ondelete='restrict', onupdate='cascade') 
47     
48    description = property(lambda self:'Change') 
49    
50 -  class Admin(EntityAdmin): 
51      name = 'History' 
52      section = 'configuration' 
53      list_display = ['creation_date', 'person', 'model', 'primary_key', 'description'] 
54      list_filter = ['model'] 
55        
56 -class BeforeUpdate(Memento): 
57    """The state of the object before an update took place""" 
58    using_options(inheritance='multi', tablename='memento_update',) 
59    previous_attributes = Field(PickleType()) 
60     
61    @property 
62 -  def description(self): 
63      return 'Update %s when previous value was %s'%(','.join(self.previous_attributes.keys()), ','.join(str(v) for v in self.previous_attributes.values())) 
64     
65 -  class Admin(EntityAdmin): 
66      name = 'Updates' 
67      list_display = Memento.Admin.list_display 
68      list_filter = ['model'] 
69       
70 -class BeforeDelete(Memento): 
71    """The state of the object before it is deleted""" 
72    using_options(inheritance='multi', tablename='memento_delete',) 
73    previous_attributes = Field(PickleType()) 
74     
75    @property 
76 -  def description(self): 
77      return 'Delete' 
78     
79 -  class Admin(EntityAdmin): 
80      name = 'Deletes' 
81      list_display = Memento.Admin.list_display 
82      list_filter = ['model'] 
83   
84 -class Create(Memento): 
85    """Marks the creation of an object""" 
86    using_options(inheritance='multi', tablename='memento_create',) 
87     
88    @property 
89 -  def description(self): 
90      return 'Create' 
91     
92 -  class Admin(EntityAdmin): 
93      name = 'Creates' 
94      list_display = Memento.Admin.list_display 
95      list_filter = ['model'] 
96