[RaphaelFakhri]

When the plugin is registered with name and a route uses pg: { transact: name }, an error raised before the preHandler hook (schema validation, an onRequest hook) leaves req.pg as null. The onError and onSend hooks then call extractRequestClient(), which reads req.pg[name] and throws Cannot read properties of null (reading '<name>'). That message replaces the original error in the response.

This change:

• Returns null from extractRequestClient() when no request client was set, so onSend skips the commit and release, as it already does for transact: true.
• Skips the ROLLBACK in onError when there is no client.
• Adds a test for schema validation failure on a named transact route.

Fixes #237

Checklist

• run npm run test && npm run benchmark --if-present
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[mcollina]

lgtm