Re: [Django] #27585: ManyToMany relationship is cascading delete after being detached

[Django]

#27585: ManyToMany relationship is cascading delete after being detached
-+-
 Reporter:  Teresa   |Owner:  nobody
 Type:  Bug  |   Status:  closed
Component:  Database layer   |  Version:  1.8
  (models, ORM)  |
 Severity:  Normal   |   Resolution:  invalid
 Keywords:  ManyToMany,  | Triage Stage:
  cascade, delete, remove|  Unreviewed
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-

Comment (by Matt):

 This problem just happened to me on Django 2.2.12 in a migration. e.g.



 {{{
 Category = apps.get_model('blog', 'Category')

 cat = Category.objects.filter(name='Cat A').first()

 for article in list(cat.article_set.all()):
 cat.article_set.remove(article)

 # This deleted all articles that were in the category but were already
 removed()
 cat.delete()
 }}}

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Re: [Django] #27585: ManyToMany relationship is cascading delete after being detached

[Django]

#27585: ManyToMany relationship is cascading delete after being detached
-+-
 Reporter:  Teresa   |Owner:  nobody
 Type:  Bug  |   Status:  closed
Component:  Database layer   |  Version:  1.8
  (models, ORM)  |
 Severity:  Normal   |   Resolution:  invalid
 Keywords:  ManyToMany,  | Triage Stage:
  cascade, delete, remove|  Unreviewed
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-
Changes (by Teresa):

 * status:  new => closed
 * resolution:   => invalid


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Ticket URL: 
Django 
The Web framework for perfectionists with deadlines.

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Re: [Django] #27585: ManyToMany relationship is cascading delete after being detached

[Django]

#27585: ManyToMany relationship is cascading delete after being detached
-+-
 Reporter:  Teresa   |Owner:  nobody
 Type:  Bug  |   Status:  new
Component:  Database layer   |  Version:  1.8
  (models, ORM)  |
 Severity:  Normal   |   Resolution:
 Keywords:  ManyToMany,  | Triage Stage:
  cascade, delete, remove|  Unreviewed
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-

Comment (by Tim Graham):

 Could you please provide a sample app with models and tests we could
 download to reproduce? The example code doesn't run as `b.as.all()` is a
 `SyntaxError`.

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Ticket URL: 
Django 
The Web framework for perfectionists with deadlines.

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Re: [Django] #27585: ManyToMany relationship is cascading delete after being detached

[Django]

#27585: ManyToMany relationship is cascading delete after being detached
-+-
 Reporter:  Teresa   |Owner:  nobody
 Type:  Bug  |   Status:  new
Component:  Database layer   |  Version:  1.8
  (models, ORM)  |
 Severity:  Normal   |   Resolution:
 Keywords:  ManyToMany,  | Triage Stage:
  cascade, delete, remove|  Unreviewed
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-
Changes (by Teresa):

 * status:  closed => new
 * resolution:  invalid =>


Comment:

 An additional detail:

 The models also have a ManyToOne foreign key constraint. But when that
 relationship has also been removed, the now unattached 'a's are deleted.

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Ticket URL: 
Django 
The Web framework for perfectionists with deadlines.

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Re: [Django] #27585: ManyToMany relationship is cascading delete after being detached

[Django]

#27585: ManyToMany relationship is cascading delete after being detached
-+-
 Reporter:  Teresa   |Owner:  nobody
 Type:  Bug  |   Status:  closed
Component:  Database layer   |  Version:  1.8
  (models, ORM)  |
 Severity:  Normal   |   Resolution:  invalid
 Keywords:  ManyToMany,  | Triage Stage:
  cascade, delete, remove|  Unreviewed
Has patch:  0|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-
Changes (by Teresa):

 * status:  new => closed
 * resolution:   => invalid


--
Ticket URL: 
Django 
The Web framework for perfectionists with deadlines.

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