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fix(migration): Make naming constraint fail softer on updates
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Only on installation we want to break hard, so that all developers notice
the bugs when installing the app on any database or CI, and can work on
fixing their migrations before releasing a version incompatible with Postgres.

In case of updates we might be running on production instances and the
administrators being faced with the error would not know how to resolve it
anyway. This can also happen with instances, that had the issue before the
current update, so we don't want to make their life more complicated
than needed.

Signed-off-by: Joas Schilling <coding@schilljs.com>
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@nickvergessen @backportbot
nickvergessen authored and backportbot[bot] committed Feb 8, 2024
1 parent 62a8f2d commit 1412eed
Showing 1 changed file with 49 additions and 10 deletions.
59 changes: 49 additions & 10 deletions lib/private/DB/MigrationService.php
View file
Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,7 @@
use OCP\DB\ISchemaWrapper;
use OCP\Migration\IMigrationStep;
use OCP\Migration\IOutput;
use OCP\Server;
use Psr\Log\LoggerInterface;

class MigrationService {
Expand All @@ -51,18 +52,24 @@ class MigrationService {
private string $migrationsPath;
private string $migrationsNamespace;
private IOutput $output;
private LoggerInterface $logger;
private Connection $connection;
private string $appName;
private bool $checkOracle;

/**
* @throws \Exception
*/
public function __construct(string $appName, Connection $connection, ?IOutput $output = null, ?AppLocator $appLocator = null) {
public function __construct(string $appName, Connection $connection, ?IOutput $output = null, ?AppLocator $appLocator = null, ?LoggerInterface $logger = null) {
$this->appName = $appName;
$this->connection = $connection;
if ($logger === null) {
$this->logger = Server::get(LoggerInterface::class);
} else {
$this->logger = $logger;
}
if ($output === null) {
$this->output = new SimpleOutput(\OC::$server->get(LoggerInterface::class), $appName);
$this->output = new SimpleOutput($this->logger, $appName);
} else {
$this->output = $output;
}
Expand Down Expand Up @@ -433,7 +440,7 @@ public function migrateSchemaOnly(string $to = 'latest'): void {
if ($toSchema instanceof SchemaWrapper) {
$this->output->debug('- Checking target database schema');
$targetSchema = $toSchema->getWrappedSchema();
$this->ensureUniqueNamesConstraints($targetSchema);
$this->ensureUniqueNamesConstraints($targetSchema, true);
if ($this->checkOracle) {
$beforeSchema = $this->connection->createSchema();
$this->ensureOracleConstraints($beforeSchema, $targetSchema, strlen($this->connection->getPrefix()));
Expand Down Expand Up @@ -514,7 +521,7 @@ public function executeStep($version, $schemaOnly = false) {

if ($toSchema instanceof SchemaWrapper) {
$targetSchema = $toSchema->getWrappedSchema();
$this->ensureUniqueNamesConstraints($targetSchema);
$this->ensureUniqueNamesConstraints($targetSchema, $schemaOnly);
if ($this->checkOracle) {
$sourceSchema = $this->connection->createSchema();
$this->ensureOracleConstraints($sourceSchema, $targetSchema, strlen($this->connection->getPrefix()));
Expand Down Expand Up @@ -650,14 +657,26 @@ public function ensureOracleConstraints(Schema $sourceSchema, Schema $targetSche
}

/**
* Ensure naming constraints
*
* Naming constraints:
* - Index, sequence and primary key names must be unique within a Postgres Schema
*
* Only on installation we want to break hard, so that all developers notice
* the bugs when installing the app on any database or CI, and can work on
* fixing their migrations before releasing a version incompatible with Postgres.
*
* In case of updates we might be running on production instances and the
* administrators being faced with the error would not know how to resolve it
* anyway. This can also happen with instances, that had the issue before the
* current update, so we don't want to make their life more complicated
* than needed.
*
* @param Schema $targetSchema
* @param bool $isInstalling
*/
public function ensureUniqueNamesConstraints(Schema $targetSchema): void {
public function ensureUniqueNamesConstraints(Schema $targetSchema, bool $isInstalling): void {
$constraintNames = [];

$sequences = $targetSchema->getSequences();

foreach ($targetSchema->getTables() as $table) {
Expand All @@ -668,14 +687,20 @@ public function ensureUniqueNamesConstraints(Schema $targetSchema): void {
}

if (isset($constraintNames[$thing->getName()])) {
throw new \InvalidArgumentException('Index name "' . $thing->getName() . '" for table "' . $table->getName() . '" collides with the constraint on table "' . $constraintNames[$thing->getName()] . '".');
if ($isInstalling) {
throw new \InvalidArgumentException('Index name "' . $thing->getName() . '" for table "' . $table->getName() . '" collides with the constraint on table "' . $constraintNames[$thing->getName()] . '".');
}
$this->logErrorOrWarning('Index name "' . $thing->getName() . '" for table "' . $table->getName() . '" collides with the constraint on table "' . $constraintNames[$thing->getName()] . '".');
}
$constraintNames[$thing->getName()] = $table->getName();
}

foreach ($table->getForeignKeys() as $thing) {
if (isset($constraintNames[$thing->getName()])) {
throw new \InvalidArgumentException('Foreign key name "' . $thing->getName() . '" for table "' . $table->getName() . '" collides with the constraint on table "' . $constraintNames[$thing->getName()] . '".');
if ($isInstalling) {
throw new \InvalidArgumentException('Foreign key name "' . $thing->getName() . '" for table "' . $table->getName() . '" collides with the constraint on table "' . $constraintNames[$thing->getName()] . '".');
}
$this->logErrorOrWarning('Foreign key name "' . $thing->getName() . '" for table "' . $table->getName() . '" collides with the constraint on table "' . $constraintNames[$thing->getName()] . '".');
}
$constraintNames[$thing->getName()] = $table->getName();
}
Expand All @@ -688,20 +713,34 @@ public function ensureUniqueNamesConstraints(Schema $targetSchema): void {
}

if (isset($constraintNames[$indexName])) {
throw new \InvalidArgumentException('Primary index name "' . $indexName . '" for table "' . $table->getName() . '" collides with the constraint on table "' . $constraintNames[$thing->getName()] . '".');
if ($isInstalling) {
throw new \InvalidArgumentException('Primary index name "' . $indexName . '" for table "' . $table->getName() . '" collides with the constraint on table "' . $constraintNames[$thing->getName()] . '".');
}
$this->logErrorOrWarning('Primary index name "' . $indexName . '" for table "' . $table->getName() . '" collides with the constraint on table "' . $constraintNames[$thing->getName()] . '".');
}
$constraintNames[$indexName] = $table->getName();
}
}

foreach ($sequences as $sequence) {
if (isset($constraintNames[$sequence->getName()])) {
throw new \InvalidArgumentException('Sequence name "' . $sequence->getName() . '" for table "' . $table->getName() . '" collides with the constraint on table "' . $constraintNames[$thing->getName()] . '".');
if ($isInstalling) {
throw new \InvalidArgumentException('Sequence name "' . $sequence->getName() . '" for table "' . $table->getName() . '" collides with the constraint on table "' . $constraintNames[$thing->getName()] . '".');
}
$this->logErrorOrWarning('Sequence name "' . $sequence->getName() . '" for table "' . $table->getName() . '" collides with the constraint on table "' . $constraintNames[$thing->getName()] . '".');
}
$constraintNames[$sequence->getName()] = 'sequence';
}
}

protected function logErrorOrWarning(string $log): void {
if ($this->output instanceof SimpleOutput) {
$this->output->warning($log);
} else {
$this->logger->error($log);
}
}

private function ensureMigrationsAreLoaded() {
if (empty($this->migrations)) {
$this->migrations = $this->findMigrations();
Expand Down

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