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Open transaction when adding Avatar email-hash pairs to the DB (#12577)

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When adding Avatar email-hash pairs we simply want the DB table to
represent a Set. We don't care if the hash-pair is already present,
so we just simply Insert and ignore the error.

Unfortunately this seems to cause some DBs to log the duplicate
insert to their logs - looking like a bug a in Gitea.

Now, there is no standard way in SQL to say Insert but if there's
an error ignore it. MySQL has INSERT IGNORE, PostgreSQL >= 9.5 has
INSERT ... ON CONFLICT DO NOTHING, but I do not believe that SQLite
or MSSQL have variants.

This PR places the insert in a transaction which we are happy to fail
if there is an error - hopefully this will stop the unnecessary
logging.

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: techknowlogick <techknowlogick@gitea.io>
This commit is contained in:
zeripath 2020-08-24 23:39:18 +01:00 committed by GitHub
parent 019e577d54
commit f3fb3c6f56
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1 changed files with 12 additions and 1 deletions
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13
models/avatar.go
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@ -41,7 +41,18 @@ func AvatarLink(email string) string {
Email: lowerEmail,
Hash: sum,
}
_, _ = x.Insert(emailHash)
// OK we're going to open a session just because I think that that might hide away any problems with postgres reporting errors
sess := x.NewSession()
defer sess.Close()
if err := sess.Begin(); err != nil {
// we don't care about any DB problem just return the lowerEmail
return lowerEmail, nil
}
_, _ = sess.Insert(emailHash)
if err := sess.Commit(); err != nil {
// Seriously we don't care about any DB problems just return the lowerEmail - we expect the transaction to fail most of the time
return lowerEmail, nil
}
return lowerEmail, nil
})
return setting.AppSubURL + "/avatar/" + url.PathEscape(sum)