Re: [Django] #25192: Can't Squash Migration that uses migrations.RunPython.noop in Python2

[Django]

#25192: Can't Squash Migration that uses migrations.RunPython.noop in Python2
+
 Reporter:  jpulec  |Owner:  nobody
 Type:  Bug |   Status:  new
Component:  Migrations  |  Version:  1.8
 Severity:  Normal  |   Resolution:
 Keywords:  | Triage Stage:  Accepted
Has patch:  0   |  Needs documentation:  0
  Needs tests:  0   |  Patch needs improvement:  0
Easy pickings:  0   |UI/UX:  0
+
Changes (by timgraham):

 * needs_better_patch:   => 0
 * stage:  Unreviewed => Accepted
 * needs_tests:   => 0
 * needs_docs:   => 0


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Ticket URL: 
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[Django] #25192: Can't Squash Migration that uses migrations.RunPython.noop in Python2

[Django]

#25192: Can't Squash Migration that uses migrations.RunPython.noop in Python2
+
 Reporter:  jpulec  |  Owner:  nobody
 Type:  Bug | Status:  new
Component:  Migrations  |Version:  1.8
 Severity:  Normal  |   Keywords:
 Triage Stage:  Unreviewed  |  Has patch:  0
Easy pickings:  0   |  UI/UX:  0
+
 When trying to squash a set of migrations, if one of them uses
 migrations.RunPython.noop for a backwards or forward operation, a
 ValueError is raised due to an attempt to serialize an unbound method. Not
 sure if there should be a special check for that operation when attempting
 to run squashmigrations with Python2.

 Traceback:
 {{{
 Traceback (most recent call last):
   File "manage.py", line 17, in 
 execute_from_command_line(sys.argv)
   File "/var/venv/local/lib/python2.7/site-
 packages/django/core/management/__init__.py", line 338, in
 execute_from_command_line
 utility.execute()
   File "/var/venv/local/lib/python2.7/site-
 packages/django/core/management/__init__.py", line 330, in execute
 self.fetch_command(subcommand).run_from_argv(self.argv)
   File "/var/venv/local/lib/python2.7/site-
 packages/django/core/management/base.py", line 393, in run_from_argv
 self.execute(*args, **cmd_options)
   File "/var/venv/local/lib/python2.7/site-
 packages/django/core/management/base.py", line 444, in execute
 output = self.handle(*args, **options)
   File "/var/venv/local/lib/python2.7/site-
 packages/django/core/management/commands/squashmigrations.py", line 141,
 in handle
 fh.write(writer.as_string())
   File "/var/venv/local/lib/python2.7/site-
 packages/django/db/migrations/writer.py", line 166, in as_string
 operation_string, operation_imports =
 OperationWriter(operation).serialize()
   File "/var/venv/local/lib/python2.7/site-
 packages/django/db/migrations/writer.py", line 124, in serialize
 _write(arg_name, arg_value)
   File "/var/venv/local/lib/python2.7/site-
 packages/django/db/migrations/writer.py", line 87, in _write
 arg_string, arg_imports = MigrationWriter.serialize(_arg_value)
   File "/var/venv/local/lib/python2.7/site-
 packages/django/db/migrations/writer.py", line 435, in serialize
 % (value.__name__, module_name, get_docs_version()))
 ValueError: Could not find function noop in
 django.db.migrations.operations.special.
 Please note that due to Python 2 limitations, you cannot serialize unbound
 method functions (e.g. a method declared and used in the same class body).
 Please move the function into the main module body to use migrations.
 }}}

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Ticket URL: 
Django 
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