#24278: squashmigrations throws ValueError: need more than 1 value to unpack
----------------------------+--------------------
Reporter: riklaunim | Owner: nobody
Type: Bug | Status: new
Component: Migrations | Version: 1.7
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
----------------------------+--------------------
When squashing several migrations I got an exception during
squashmigrations:
{{{
Traceback (most recent call last):
File "/env/bin/django-admin.py", line 5, in <module>
management.execute_from_command_line()
File "/env/lib/python3.4/site-
packages/django/core/management/__init__.py", line 385, in
execute_from_command_line
utility.execute()
File "/env/lib/python3.4/site-
packages/django/core/management/__init__.py", line 377, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/env/lib/python3.4/site-packages/django/core/management/base.py",
line 288, in run_from_argv
self.execute(*args, **options.__dict__)
File "/env/lib/python3.4/site-packages/django/core/management/base.py",
line 338, in execute
output = self.handle(*args, **options)
File "/env/lib/python3.4/site-
packages/django/core/management/commands/squashmigrations.py", line 122,
in handle
fh.write(writer.as_string())
File "/env/lib/python3.4/site-packages/django/db/migrations/writer.py",
line 130, in as_string
operation_string, operation_imports =
OperationWriter(operation).serialize()
File "/env/lib/python3.4/site-packages/django/db/migrations/writer.py",
line 87, in serialize
arg_string, arg_imports = MigrationWriter.serialize(arg_value)
File "/env/lib/python3.4/site-packages/django/db/migrations/writer.py",
line 260, in serialize
item_string, item_imports = cls.serialize(item)
File "/env/lib/python3.4/site-packages/django/db/migrations/writer.py",
line 327, in serialize
return cls.serialize_deconstructed(*value.deconstruct())
File "/env/lib/python3.4/site-packages/django/db/migrations/writer.py",
line 223, in serialize_deconstructed
module, name = path.rsplit(".", 1)
ValueError: need more than 1 value to unpack
}}}
The "path" variable got a value of "RenameField" instead of
django.something.someField. I found one "migrations.RenameField" in the
migrations set and after removing it (and "migrations.AlterField" which
also caused such exception) the squash passed.
The migration (operations) with those fields looks like so:
{{{
operations = [
migrations.SeparateDatabaseAndState(state_operations=[
migrations.RenameField(
model_name='somemodel',
old_name='some_old_name',
new_name='new_name',
),
migrations.AlterField(
model_name='somemodel',
name='new_name',
field=models.BooleanField(db_column='some_old_name',
default=False),
preserve_default=True,
),
]),
]
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/24278>
Django <https://code.djangoproject.com/>
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