Django

Code

Show
Ignore:
Timestamp:
02/09/07 23:48:20 (2 years ago)
Author:
ubernostrum
Message:

Backport generic-relations data loss fix from [4428]. Thanks to Malcolm for pointing out my stupid error the first time I tried this.

Files:

Legend:

Unmodified
Added
Removed
Modified
Copied
Moved

  • django/branches/0.95-bugfixes/tests/modeltests/generic_relations/models.py

    r3160 r4476  
    6666# Objects with declared GenericRelations can be tagged directly -- the API 
    6767# mimics the many-to-many API. 
     68>>> bacon.tags.create(tag="fatty") 
     69<TaggedItem: fatty> 
     70>>> bacon.tags.create(tag="salty") 
     71<TaggedItem: salty> 
    6872>>> lion.tags.create(tag="yellow") 
    6973<TaggedItem: yellow> 
    7074>>> lion.tags.create(tag="hairy") 
    7175<TaggedItem: hairy> 
    72 >>> bacon.tags.create(tag="fatty") 
    73 <TaggedItem: fatty> 
    74 >>> bacon.tags.create(tag="salty") 
    75 <TaggedItem: salty> 
    7676 
    7777>>> lion.tags.all() 
    …… 
    106106>>> TaggedItem.objects.filter(content_type__pk=ctype.id, object_id=quartz.id) 
    107107[<TaggedItem: clearish>] 
     108 
     109 
     110# If you delete an object with an explicit Generic relation, the related  
     111# objects are deleted when the source object is deleted.  
     112# Original list of tags:  
     113>>> [(t.tag, t.content_type, t.object_id) for t in TaggedItem.objects.all()]  
     114[('clearish', <ContentType: mineral>, 1), ('fatty', <ContentType: vegetable>, 2), ('hairy', <ContentType: animal>, 1), ('salty', <ContentType: vegetable>, 2), ('shiny', <ContentType: animal>, 2), ('yellow', <ContentType: animal>, 1)] 
     115  
     116>>> lion.delete()  
     117>>> [(t.tag, t.content_type, t.object_id) for t in TaggedItem.objects.all()]  
     118[('clearish', <ContentType: mineral>, 1), ('fatty', <ContentType: vegetable>, 2), ('salty', <ContentType: vegetable>, 2), ('shiny', <ContentType: animal>, 2)] 
     119  
     120# If Generic Relation is not explicitly defined, any related objects   
     121# remain after deletion of the source object.  
     122>>> quartz.delete()  
     123>>> [(t.tag, t.content_type, t.object_id) for t in TaggedItem.objects.all()]  
     124[('clearish', <ContentType: mineral>, 1), ('fatty', <ContentType: vegetable>, 2), ('salty', <ContentType: vegetable>, 2), ('shiny', <ContentType: animal>, 2)] 
     125  
     126# If you delete a tag, the objects using the tag are unaffected   
     127# (other than losing a tag)  
     128>>> tag = TaggedItem.objects.get(id=1)  
     129>>> tag.delete()  
     130>>> bacon.tags.all()  
     131[<TaggedItem: salty>] 
     132>>> [(t.tag, t.content_type, t.object_id) for t in TaggedItem.objects.all()]  
     133[('clearish', <ContentType: mineral>, 1), ('salty', <ContentType: vegetable>, 2), ('shiny', <ContentType: animal>, 2)] 
     134 
    108135"""