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fix postgres constraints, add postgres testing

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This commit fixes the constraint syntax so it is both valid for
sqlite and postgres.

To validate this, I've added a new postgres testing library and a
helper that will spin up local postgres, setup a db and use it in
the constraints tests. This should also help testing db stuff in
the future.

postgres has been added to the nix dev shell and is now required
for running the unit tests.

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commit is contained in:
Kristoffer Dalby 2024-11-23 11:19:52 +01:00 • committed by Juan Font
parent 7d9b430ec2
commit f6276ab9d2
7 changed files with 95 additions and 21 deletions
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10
hscontrol/db/db.go
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@ -505,11 +505,11 @@ func NewHeadscaleDatabase(
// - A provider_identifier is unique
// - A user name is unique if there is no provider_identifier is not set
for _, idx := range []string{
"DROP INDEX IF EXISTS `idx_provider_identifier`",
"DROP INDEX IF EXISTS `idx_name_provider_identifier`",
"CREATE UNIQUE INDEX IF NOT EXISTS `idx_provider_identifier` ON `users` (`provider_identifier`) WHERE provider_identifier IS NOT NULL;",
"CREATE UNIQUE INDEX IF NOT EXISTS `idx_name_provider_identifier` ON `users` (`name`,`provider_identifier`);",
"CREATE UNIQUE INDEX IF NOT EXISTS `idx_name_no_provider_identifier` ON `users` (`name`) WHERE provider_identifier IS NULL;",
"DROP INDEX IF EXISTS idx_provider_identifier",
"DROP INDEX IF EXISTS idx_name_provider_identifier",
"CREATE UNIQUE INDEX IF NOT EXISTS idx_provider_identifier ON users (provider_identifier) WHERE provider_identifier IS NOT NULL;",
"CREATE UNIQUE INDEX IF NOT EXISTS idx_name_provider_identifier ON users (name,provider_identifier);",
"CREATE UNIQUE INDEX IF NOT EXISTS idx_name_no_provider_identifier ON users (name) WHERE provider_identifier IS NULL;",
} {
err = tx.Exec(idx).Error
if err != nil {