The column named "PSUDO_USERNAME" cannot be a column of a primary key or unique key constraint because it can contain null values. #103
Description
On a brand new project start I install Django, ibm_db, ibm_db_django. I configure DB like so:
DATABASES = {
'default': {
'ENGINE': 'ibm_db_django',
'NAME': 'TEST',
'USER': '<redacted>',
'PASSWORD': '<redacted>',
'HOST': 'localhost',
'PORT': '25000',
'PCONNECT': True,
'OPTIONS': {
'options': '-c search_path=BOROLIB'
}
},
}
Then run:
python.exe .\manage.py makemigrations
python.exe .\manage.py migrate
Which results in this error:
Operations to perform:
Apply all migrations: admin, auth, contenttypes, sessions
Running migrations:
Applying auth.0008_alter_user_username_max_length...Traceback (most recent call last):
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\ibm_db_dbi.py", line 1312, in _execute_helper
return_value = ibm_db.execute(self.stmt_handler, parameters)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Exception: Statement Execute Failed: [IBM][CLI Driver][DB2/NT64] SQL0542N The column named "PSUDO_USERNAME" cannot be a column of a primary key or unique key constraint because it can contain null values. SQLSTATE=42831 SQLCODE=-542
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\ibm_db_django\pybase.py", line 314, in execute
super( DB2CursorWrapper, self ).execute( operation, parameters )
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\ibm_db_dbi.py", line 1409, in execute
self._execute_helper(parameters)
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\ibm_db_dbi.py", line 1322, in _execute_helper
raise self.messages[len(self.messages) - 1]
ibm_db_dbi.ProgrammingError: ibm_db_dbi::ProgrammingError: Statement Execute Failed: [IBM][CLI Driver][DB2/NT64] SQL0542N The column named "PSUDO_USERNAME" cannot be a column of a primary key or unique key constraint because it can contain null values. SQLSTATE=42831 SQLCODE=-542
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Users\tdunn\Documents\workspaces\test\manage.py", line 22, in <module>
main()
File "C:\Users\tdunn\Documents\workspaces\test\manage.py", line 18, in main
execute_from_command_line(sys.argv)
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\core\management\__init__.py", line 442, in execute_from_command_line
utility.execute()
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\core\management\__init__.py", line 436, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\core\management\base.py", line 413, in run_from_argv
self.execute(*args, **cmd_options)
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\core\management\base.py", line 459, in execute
output = self.handle(*args, **options)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\core\management\base.py", line 107, in wrapper
res = handle_func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\core\management\commands\migrate.py", line 357, in handle
post_migrate_state = executor.migrate(
^^^^^^^^^^^^^^^^^
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\db\migrations\executor.py", line 135, in migrate
state = self._migrate_all_forwards(
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\db\migrations\executor.py", line 167, in _migrate_all_forwards
state = self.apply_migration(
^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\db\migrations\executor.py", line 255, in apply_migration
state = migration.apply(state, schema_editor)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\db\migrations\migration.py", line 132, in apply
operation.database_forwards(
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\db\migrations\operations\fields.py", line 241, in database_forwards
schema_editor.alter_field(from_model, from_field, to_field)
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\ibm_db_django\schemaEditor.py", line 287, in alter_field
self._alter_field(model, old_field, new_field, old_type, new_type,
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\ibm_db_django\schemaEditor.py", line 413, in _alter_field
old_field, new_field = self.alterFieldDataTypeByRemaking(model, old_field, new_field, strict)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\ibm_db_django\schemaEditor.py", line 819, in alterFieldDataTypeByRemaking
_ , skip_post = self.add_field_pre(model, tmp_new_field, unique)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\ibm_db_django\schemaEditor.py", line 682, in add_field_pre
self.execute(sql, params)
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\db\backends\base\schema.py", line 202, in execute
cursor.execute(sql, params)
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\db\backends\utils.py", line 122, in execute
return super().execute(sql, params)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\db\backends\utils.py", line 79, in execute
return self._execute_with_wrappers(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\db\backends\utils.py", line 92, in _execute_with_wrappers
return executor(sql, params, many, context)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\django\db\backends\utils.py", line 105, in _execute
return self.cursor.execute(sql, params)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\ibm_db_django\pybase.py", line 323, in execute
six.reraise(utils.ProgrammingError, utils.ProgrammingError( *tuple( six.PY3 and e.args or ( e._message, ) ) ), sys.exc_info()[2])
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\six.py", line 718, in reraise
raise value.with_traceback(tb)
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\ibm_db_django\pybase.py", line 314, in execute
super( DB2CursorWrapper, self ).execute( operation, parameters )
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\ibm_db_dbi.py", line 1409, in execute
self._execute_helper(parameters)
File "C:\Users\tdunn\Documents\workspaces\test\.venv\Lib\site-packages\ibm_db_dbi.py", line 1322, in _execute_helper
raise self.messages[len(self.messages) - 1]
django.db.utils.ProgrammingError: Statement Execute Failed: [IBM][CLI Driver][DB2/NT64] SQL0542N The column named "PSUDO_USERNAME" cannot be a column of a primary key or unique key constraint because it can contain null values. SQLSTATE=42831 SQLCODE=-542
This is an out-of-the-box django with only a db connection configuration. I'm not sure how to fix this or proceed.
Versions:
Django==5.1.1
ibm_db==3.2.3
ibm_db_django==1.5.3.0
Python 3.12.3
DB2/NT64 11.5.9.0