Fix dgraph response nil

CHANGELOG.md

@@ -5,6 +5,7 @@
 - Add language support for Hypermode Go SDK [#317](https://github.com/hypermodeAI/runtime/pull/317) [#351](https://github.com/hypermodeAI/runtime/pull/351) [#352](https://github.com/hypermodeAI/runtime/pull/352)
 - Major refactoring to support multiple guest languages [#347](https://github.com/hypermodeAI/runtime/pull/347)
 - Rename `hmruntime` to `hypruntime` [#348](https://github.com/hypermodeAI/runtime/pull/348)
+- Make empty dgraph responses nil [#355](https://github.com/hypermodeAI/runtime/pull/355)
 
 ## 2024-08-27 - Version 0.11.2
 

dgraphclient/dgraph.go

@@ -6,6 +6,7 @@ package dgraphclient
 
 import (
 	"context"
+	"fmt"
 	"hypruntime/logger"
 
 	"github.com/dgraph-io/dgo/v230"
@@ -48,7 +49,7 @@ func (dc *dgraphConnector) dropAll(ctx context.Context) (string, error) {
 func (dc *dgraphConnector) execute(ctx context.Context, req *Request) (*Response, error) {
 	if len(req.Mutations) == 0 {
 		if req.Query.Query == "" {
-			return &Response{}, nil
+			return nil, fmt.Errorf("no query or mutations provided")
 		}
 
 		tx := dc.dgClient.NewReadOnlyTxn()
@@ -68,7 +69,7 @@ func (dc *dgraphConnector) execute(ctx context.Context, req *Request) (*Response
 
 		resp, err := tx.Do(ctx, dgoReq)
 		if err != nil {
-			return &Response{}, err
+			return nil, err
 		}
 
 		return &Response{Json: string(resp.Json), Uids: resp.Uids}, nil
@@ -118,7 +119,7 @@ func (dc *dgraphConnector) execute(ctx context.Context, req *Request) (*Response
 
 	resp, err := tx.Do(ctx, dgoReq)
 	if err != nil {
-		return &Response{}, err
+		return nil, err
 	}
 
 	return &Response{Json: string(resp.Json), Uids: resp.Uids}, nil

dgraphclient/dgraphclient.go

@@ -20,7 +20,7 @@ func Initialize() {
 func Execute(ctx context.Context, hostName string, req *Request) (*Response, error) {
 	dc, err := dgr.getDgraphConnector(ctx, hostName)
 	if err != nil {
-		return &Response{}, err
+		return nil, err
 	}
 
 	return dc.execute(ctx, req)