handle for pg no rows

Author: prakash100198

pkg/configDiff/DeploymentConfigurationService.go

@@ -7,6 +7,7 @@ import (
 	appRepository "github.com/devtron-labs/devtron/internal/sql/repository/app"
 	"github.com/devtron-labs/devtron/internal/sql/repository/chartConfig"
 	"github.com/devtron-labs/devtron/internal/sql/repository/pipelineConfig"
+	"github.com/devtron-labs/devtron/internal/util"
 	bean3 "github.com/devtron-labs/devtron/pkg/bean"
 	chartService "github.com/devtron-labs/devtron/pkg/chart"
 	"github.com/devtron-labs/devtron/pkg/cluster/repository"
@@ -27,6 +28,7 @@ import (
 	util2 "github.com/devtron-labs/devtron/util"
 	"github.com/go-pg/pg"
 	"go.uber.org/zap"
+	"net/http"
 )
 
 type DeploymentConfigurationService interface {
@@ -175,9 +177,11 @@ func (impl *DeploymentConfigurationServiceImpl) getConfigDataForCdRollback(ctx c
 func (impl *DeploymentConfigurationServiceImpl) getDeploymentHistoryConfig(ctx context.Context, configDataQueryParams *bean2.ConfigDataQueryParams) (*bean2.DeploymentAndCmCsConfig, error) {
 	deploymentJson := json.RawMessage{}
 	deploymentHistory, err := impl.deploymentTemplateHistoryRepository.GetHistoryByPipelineIdAndWfrId(configDataQueryParams.PipelineId, configDataQueryParams.WfrId)
-	if err != nil {
+	if err != nil && !util.IsErrNoRows(err) {
 		impl.logger.Errorw("error in getting deployment template history for pipelineId and wfrId", "pipelineId", configDataQueryParams.PipelineId, "wfrId", configDataQueryParams.WfrId, "err", err)
 		return nil, err
+	} else if util.IsErrNoRows(err) {
+		return nil, util.GetApiError(http.StatusNotFound, bean2.NoDeploymentDoneForSelectedImage, bean2.NoDeploymentDoneForSelectedImage)
 	}
 	err = deploymentJson.UnmarshalJSON([]byte(deploymentHistory.Template))
 	if err != nil {

pkg/configDiff/bean/bean.go

@@ -227,3 +227,7 @@ type DeploymentTemplateMetadata struct {
 	TemplateVersion        string
 	IsAppMetricsEnabled    bool
 }
+
+const (
+	NoDeploymentDoneForSelectedImage = "there were no deployments done for the selected image"
+)