Re: Method call when deleting FK in admin

[Jani Tiainen]

Reason is that admin uses QuerySet.delete()
(https://docs.djangoproject.com/en/1.3/ref/models/querysets/#delete)

Note that deleting files while deleting models is dangerous: what happens if
deletion is aborted and rolled back for some reason? You have now deleted
files but instances stayed in a database. And you have lost data - and
created inconsistency on top of that all.

On Sat, Jul 23, 2011 at 12:07 AM, galgal  wrote:

>
>
> My models:class Spectacle(models.Model):
>
> title = models.CharField(max_length=100)
> slug = models.SlugField(max_length=100 unique=False)
> description = models.TextField()
> class SpectacleGallery(models.Model):
> spectacle = models.ForeignKey(Spectacle)
> image = models.ImageField(upload_to=upload_path_handler, max_length=255,
> help_text=_(u'tylko pliki z rozszerzeniem .jpg'))
> image_thumb = models.CharField(max_length=255, editable=False, blank=True,
> null=True)
> def delete(self, *args, **kwargs):
>
> image_thumb_abs = settings.MEDIA_ROOT + str(self.image_thumb)
>
> # try to delete thumb and image
>
> try:
>
> remove(image_thumb_abs)
>
> except Exception:
>
> pass
>
> try:
>
> self.image.delete()
>
> except Exception:
>
> pass
>
> super(SpectacleGallery, self).delete(*args, **kwargs) # Call the "real"
> delete() method.
>
> #try to delete dir
>
> try:
>
> removedirs(settings.SPECTACLE_GALLERY_UPLOAD_PATH + str(self.spectacle_id))
>
> except:
>
> pass
>
>
> Now in admin, when I delete from SpectacleGallery file is being deleted
> from disk and DB properly. The problem is when I want to delete Spectacle.
> Deletion page is asking if i'm sure to delete Spectacle and all related
> images. I confirm and: all records from database are deleted. Unfortunately
> files from SpectacleGallery are not deleted.I paste print into delete()
> method in SpectacleGallery. Nothing shows so my question is: Why delete
> method is not called when deleting it in that way?
>
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Re: Method call when deleting FK in admin

[Kejun He]

try "admins.ModelAdmin"

On Sat, Jul 23, 2011 at 5:07 AM, galgal  wrote:

>
>
> My models:class Spectacle(models.Model):
>
> title = models.CharField(max_length=100)
> slug = models.SlugField(max_length=100 unique=False)
> description = models.TextField()
> class SpectacleGallery(models.Model):
> spectacle = models.ForeignKey(Spectacle)
> image = models.ImageField(upload_to=upload_path_handler, max_length=255,
> help_text=_(u'tylko pliki z rozszerzeniem .jpg'))
> image_thumb = models.CharField(max_length=255, editable=False, blank=True,
> null=True)
> def delete(self, *args, **kwargs):
>
> image_thumb_abs = settings.MEDIA_ROOT + str(self.image_thumb)
>
> # try to delete thumb and image
>
> try:
>
> remove(image_thumb_abs)
>
> except Exception:
>
> pass
>
> try:
>
> self.image.delete()
>
> except Exception:
>
> pass
>
> super(SpectacleGallery, self).delete(*args, **kwargs) # Call the "real"
> delete() method.
>
> #try to delete dir
>
> try:
>
> removedirs(settings.SPECTACLE_GALLERY_UPLOAD_PATH + str(self.spectacle_id))
>
> except:
>
> pass
>
>
> Now in admin, when I delete from SpectacleGallery file is being deleted
> from disk and DB properly. The problem is when I want to delete Spectacle.
> Deletion page is asking if i'm sure to delete Spectacle and all related
> images. I confirm and: all records from database are deleted. Unfortunately
> files from SpectacleGallery are not deleted.I paste print into delete()
> method in SpectacleGallery. Nothing shows so my question is: Why delete
> method is not called when deleting it in that way?
>
> --
> You received this message because you are subscribed to the Google Groups
> "Django users" group.
> To view this discussion on the web visit
> https://groups.google.com/d/msg/django-users/-/6o66VmCVQqMJ.
> To post to this group, send email to django-users@googlegroups.com.
> To unsubscribe from this group, send email to
> django-users+unsubscr...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/django-users?hl=en.
>

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Method call when deleting FK in admin

[galgal]

My models:class Spectacle(models.Model):

title = models.CharField(max_length=100)
slug = models.SlugField(max_length=100 unique=False)
description = models.TextField()
class SpectacleGallery(models.Model):
spectacle = models.ForeignKey(Spectacle)
image = models.ImageField(upload_to=upload_path_handler, max_length=255, 
help_text=_(u'tylko pliki z rozszerzeniem .jpg'))
image_thumb = models.CharField(max_length=255, editable=False, blank=True, 
null=True)
def delete(self, *args, **kwargs):

image_thumb_abs = settings.MEDIA_ROOT + str(self.image_thumb)

# try to delete thumb and image

try:

remove(image_thumb_abs)

except Exception:

pass

try:

self.image.delete()

except Exception:

pass

super(SpectacleGallery, self).delete(*args, **kwargs) # Call the "real" 
delete() method.

#try to delete dir

try:

removedirs(settings.SPECTACLE_GALLERY_UPLOAD_PATH + str(self.spectacle_id))

except:

pass


Now in admin, when I delete from SpectacleGallery file is being deleted from 
disk and DB properly. The problem is when I want to delete Spectacle. 
Deletion page is asking if i'm sure to delete Spectacle and all related 
images. I confirm and: all records from database are deleted. Unfortunately 
files from SpectacleGallery are not deleted.I paste print into delete() 
method in SpectacleGallery. Nothing shows so my question is: Why delete 
method is not called when deleting it in that way? 

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