Re: [PATCH] pgarchives: bugfix: increase listsubscription username length

From: Magnus Hagander <magnus(at)hagander(dot)net>
To: Célestin Matte <celestin(dot)matte(at)cmatte(dot)me>
Cc: PostgreSQL WWW <pgsql-www(at)lists(dot)postgresql(dot)org>
Subject: Re: [PATCH] pgarchives: bugfix: increase listsubscription username length
Date: 2025-12-01 19:56:21
Message-ID: CABUevEzt6g0wsNoEciHJo1kqZGxCc47NrzuBHCvWQoihsVrj3Q@mail.gmail.com
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Hi!

Better late than never, this has been pushed. Sorry about the delay!

//Magnus

On Mon, 22 Sept 2025 at 21:28, Célestin Matte <celestin(dot)matte(at)cmatte(dot)me>
wrote:

> Correction: the field is copied from auth_user.username, which is max 150
> characters:
> https://docs.djangoproject.com/en/5.2/ref/contrib/auth/#django.contrib.auth.models.User.username
>
> Corrected patch attached
>
> On 22/09/2025 21:13, Célestin Matte wrote:
> > The listsubscription username field is populated by pglister_sync,
> > copying information from auth_user.email, which can be up to
> > 254 characters.
> > If a user defined an email address that is longer than 30
> > characters, pglister_sync will crash:
> >
> > Traceback (most recent call last):
> > File "/path/pglister_sync.py", line 83, in <module>
> > curs.execute("WITH t(u) AS (SELECT UNNEST(%(usernames)s::text[])),
> ins(un) AS (INSERT INTO listsubscribers (username, list_id) SELECT u,
> %(listid)s FROM t WHERE NOT EXISTS (SELECT 1 FROM listsubscribers WHERE
> username=u AND list_id=%(listid)s) RETURNING username), del(un) AS (DELETE
> FROM listsubscribers WHERE list_id=%(listid)s AND NOT EXISTS (SELECT 1 FROM
> t WHERE u=username) RETURNING username) SELECT 'ins',un FROM ins UNION ALL
> SELECT 'del',un FROM del ORDER BY 1,2", {
> > psycopg2.errors.StringDataRightTruncation: value too long for type
> character varying(30)
> >
> > This patch fixes the issue by using the same max length as any
> > django email field for this field.
>
>
> --
> Célestin Matte

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