#29790: Migration that switches a model to a UUID primary key fails with
"duplicate
column name: id"
-------------------------------------+-------------------------------------
Reporter: Richard Ebeling | Owner: nobody
Type: Bug | Status: new
Component: Migrations | Version: 2.1
Severity: Normal | Resolution:
Keywords: multiple primary | Triage Stage: Accepted
keys migration id uuid |
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Comment (by Simon Charette):
If you want to maintain Django 1.11 support you could add a `RunPython`
operation that does something along the following before the swapped
`AlterField`
{{{#!python
def delete_primary_key(apps, schema_editor):
model = apps.get_model('django_rest_passwordreset',
'ResetPasswordToken')
opts = model._meta
connection = schema_editor.connection
# Retrieve primary key constraint.
with connection.cursor() as cursor:
constraints = connection.introspection.get_constraints(cursor,
opts.db_table)
for constraint_name, constraint in constraints.items():
if constraint.get('primary_key'):
break
else:
raise Exception('Missing primary key constraint')
# Delete primary key constraint
quote_name = connection.ops.quote_name
schema_editor.execute(schema_editor.sql_delete_pk.format(
table_name=quote_name(table_name),
name=quote_name(constraint_name),
))
--
Ticket URL: <https://code.djangoproject.com/ticket/29790#comment:9>
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