#31036: MySQL driver has incorrect primary key default, causing failure to
insert
auto increment rows with no additional values.
-------------------------------------+-------------------------------------
Reporter: PeterVenable | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: 2.2
(models, ORM) |
Severity: Normal | Resolution:
Keywords: mysql | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 1 | UI/UX: 0
-------------------------------------+-------------------------------------
Description changed by PeterVenable:
Old description:
> The problem:
>
> Given a MySQL table with only one column, an auto-increment primary key
> integer, inserting a row should be as simple as calling
> MyTable.objects.create()
> However, the generated SQL is:
> {{{
> INSERT INTO `myapp_mytable` (`id`) VALUES (DEFAULT);
> -- Error Code: 1062. Duplicate entry '0' for key 'PRIMARY'
> }}}
> Instead it should generate:
> {{{
> INSERT INTO `myapp_mytable` (`id`) VALUES (NULL);
> }}}
>
> The fix could be a one-line edit to
> https://github.com/django/django/blob/master/django/db/backends/base/operations.py#L294
> changing 'DEFAULT' to 'NULL'.
New description:
The problem:
Given a MySQL 5.6 table with only one column, an auto-increment primary
key integer, inserting a row should be as simple as calling
MyTable.objects.create()
However, the generated SQL is:
{{{
INSERT INTO `myapp_mytable` (`id`) VALUES (DEFAULT);
-- Error Code: 1062. Duplicate entry '0' for key 'PRIMARY'
}}}
Instead it should generate:
{{{
INSERT INTO `myapp_mytable` (`id`) VALUES (NULL);
}}}
The fix could be a one-line edit to
https://github.com/django/django/blob/master/django/db/backends/base/operations.py#L294
changing 'DEFAULT' to 'NULL'.
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Ticket URL: <https://code.djangoproject.com/ticket/31036#comment:1>
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