#23406: Migrations not found when only .pyc files are available (e.g. in a
frozen
environment)
-------------------------+-------------------------------------------------
Reporter: | Owner: nobody
danielmenzel | Status: new
Type: Bug | Version: 1.7
Component: | Keywords: migrations, .pyc, frozen, cx_Freeze
Migrations | Has patch: 0
Severity: Normal | UI/UX: 0
Triage Stage: |
Unreviewed |
Easy pickings: 0 |
-------------------------+-------------------------------------------------
== Description ==
When only '''.pyc''' files are available, for example in a frozen
environment after running ''cx_Freeze'' or similar tools, migrations no
longer work: the migrate command does not find any migrations to apply,
and produces the following output:
{{{
Operations to perform:
Synchronize unmigrated apps: <some apps that really have no migrations>
Apply all migrations: (none)
Synchronizing apps without migrations:
Creating tables...
Creating table <some tables>
Installing custom SQL...
Installing indexes...
Running migrations:
No migrations to apply.
Your models have changes that are not yet reflected in a migration, and
so won't be applied.
Run 'manage.py makemigrations' to make new migrations, and then re-run
'manage.py migrate' to apply them.
}}}
Subsequent operations then fail because the database is unmigrated.
The typical content of a frozen migrations folder looks like this:
{{{
django
contrib
contenttypes
migrations
__init__.pyc
0001_initial.pyc
}}}
== Analysis ==
Due to issue [https://code.djangoproject.com/ticket/23237], there was a
change in django.db.migrations.loader
([https://code.djangoproject.com/changeset/267630ad50c69ebfe594de37a0636264aa5be7d6]):
Previously, migrations were found if they had a '''.py''', '''.pyc''', or
'''.pyo''' extension. Now only migrations with '''.py''' extensions are
found.
Perhaps it would be possible to add a check if Django is running in a
frozen environment:
{{{
if hasattr(sys, 'frozen'):
extensions = ('.py', '.pyc')
else:
extensions = ('.py', )
...
if name.endswith(extensions):
...
}}}
or make the list of allowed extensions configurable by the user.
--
Ticket URL: <https://code.djangoproject.com/ticket/23406>
Django <https://code.djangoproject.com/>
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