id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
35948	FileField storage should support lambda	Alexander Nestorov		"Since Django already supports callables for the `storage` parameter of FileField, it would be nice if it also supported lambdas.
Currently, attempting to use lambda will result in the following error:


{{{
 File ""/usr/local/lib/python3.11/site-packages/django/core/management/__init__.py"", line 442, in execute_from_command_line
    utility.execute()
  File ""/usr/local/lib/python3.11/site-packages/django/core/management/__init__.py"", line 436, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File ""/usr/local/lib/python3.11/site-packages/django/core/management/base.py"", line 413, in run_from_argv
    self.execute(*args, **cmd_options)
  File ""/usr/local/lib/python3.11/site-packages/django/core/management/base.py"", line 459, in execute
    output = self.handle(*args, **options)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ""/usr/local/lib/python3.11/site-packages/django/core/management/base.py"", line 107, in wrapper
    res = handle_func(*args, **kwargs)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ""/usr/local/lib/python3.11/site-packages/django/core/management/commands/makemigrations.py"", line 259, in handle
    self.write_migration_files(changes)
  File ""/usr/local/lib/python3.11/site-packages/django/core/management/commands/makemigrations.py"", line 364, in write_migration_files
    migration_string = writer.as_string()
                       ^^^^^^^^^^^^^^^^^^
  File ""/usr/local/lib/python3.11/site-packages/django/db/migrations/writer.py"", line 141, in as_string
    operation_string, operation_imports = OperationWriter(operation).serialize()
                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ""/usr/local/lib/python3.11/site-packages/django/db/migrations/writer.py"", line 99, in serialize
    _write(arg_name, arg_value)
  File ""/usr/local/lib/python3.11/site-packages/django/db/migrations/writer.py"", line 51, in _write
    arg_string, arg_imports = MigrationWriter.serialize(item)
                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ""/usr/local/lib/python3.11/site-packages/django/db/migrations/writer.py"", line 287, in serialize
    return serializer_factory(value).serialize()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ""/usr/local/lib/python3.11/site-packages/django/db/migrations/serializer.py"", line 51, in serialize
    item_string, item_imports = serializer_factory(item).serialize()
                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ""/usr/local/lib/python3.11/site-packages/django/db/migrations/serializer.py"", line 240, in serialize
    return self.serialize_deconstructed(path, args, kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ""/usr/local/lib/python3.11/site-packages/django/db/migrations/serializer.py"", line 105, in serialize_deconstructed
    arg_string, arg_imports = serializer_factory(arg).serialize()
                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ""/usr/local/lib/python3.11/site-packages/django/db/migrations/serializer.py"", line 185, in serialize
    raise ValueError(""Cannot serialize function: lambda"")
}}}


https://docs.djangoproject.com/en/5.1/topics/files/#using-a-callable"	New feature	closed	File uploads/storage	5.1	Normal	wontfix	storage, lambda		Unreviewed	0	0	0	0	0	0