fix(dashboard-api): sqlc UUID array encoding (#2316)

fix(db): register uuid[] mapping for pgx exec mode

Made-with: Cursor

Author: ben-fornefeld

packages/db/pkg/pool/main.go

@@ -5,7 +5,9 @@ import (
 	"fmt"
 
 	"github.com/exaring/otelpgx"
+	"github.com/google/uuid"
 	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgtype"
 	"github.com/jackc/pgx/v5/pgxpool"
 	"go.opentelemetry.io/otel/attribute"
 
@@ -32,6 +34,31 @@ func New(ctx context.Context, databaseURL string, poolName string, options ...Op
 	// Disable statement caching to avoid issues with prepared statements in transactions
 	config.ConnConfig.DefaultQueryExecMode = pgx.QueryExecModeExec
 
+	previousAfterConnect := config.AfterConnect
+	config.AfterConnect = func(ctx context.Context, conn *pgx.Conn) error {
+		if previousAfterConnect != nil {
+			if err := previousAfterConnect(ctx, conn); err != nil {
+				return err
+			}
+		}
+
+		typeMap := conn.TypeMap()
+		typeMap.RegisterType(&pgtype.Type{
+			Name: "uuid[]",
+			OID:  pgtype.UUIDArrayOID,
+			Codec: &pgtype.ArrayCodec{
+				ElementType: &pgtype.Type{
+					Name:  "uuid",
+					OID:   pgtype.UUIDOID,
+					Codec: pgtype.UUIDCodec{},
+				},
+			},
+		})
+		typeMap.RegisterDefaultPgType([]uuid.UUID{}, "uuid[]")
+
+		return nil
+	}
+
 	// Create the connection pool
 	pool, err := pgxpool.NewWithConfig(ctx, config)
 	if err != nil {