logging on gql errors

internal/httpServer.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/graph-gophers/dataloader"
 	"github.com/graphql-go/graphql"
+	"github.com/graphql-go/graphql/gqlerrors"
 	"github.com/graphql-go/handler"
 	"github.com/minio/minio-go/v7"
 
@@ -23,6 +24,15 @@ func initHttp(resolveContext context.Context, schema graphql.Schema) error {
 		Pretty:     true,
 		GraphiQL:   false,
 		Playground: true,
+		FormatErrorFn: func(err error) gqlerrors.FormattedError {
+			switch err := err.(type) {
+			case gqlerrors.FormattedError:
+				log.Error("GQL: ", err.Message)
+			case *gqlerrors.Error:
+				log.Errorf("GQL: '%s' at '%v'", err.Message, err.Path)
+			}
+			return gqlerrors.FormatError(err)
+		},
 	})
 
 	http.HandleFunc("/graphql", func(rw http.ResponseWriter, r *http.Request) {