diff --git a/pkg/cloudcommon/db/db_dispatcher.go b/pkg/cloudcommon/db/db_dispatcher.go
index db89340d58..5a6b32b250 100644
--- a/pkg/cloudcommon/db/db_dispatcher.go
+++ b/pkg/cloudcommon/db/db_dispatcher.go
@@ -811,6 +811,14 @@ func FetchModelObjects(modelManager IModelManager, query *sqlchemy.SQuery, targe
 	return nil
 }
 
+func DoCreate(manager IModelManager, ctx context.Context, userCred mcclient.TokenCredential, query jsonutils.JSONObject, data jsonutils.JSONObject) (IModel, error) {
+	ownerProjId, err := fetchOwnerProjectId(ctx, manager, userCred, data)
+	if err != nil {
+		return nil, err
+	}
+	return doCreateItem(manager, ctx, userCred, ownerProjId, nil, data)
+}
+
 func doCreateItem(manager IModelManager, ctx context.Context, userCred mcclient.TokenCredential, ownerProjId string, query jsonutils.JSONObject, data jsonutils.JSONObject) (IModel, error) {
 	dataDict := data.(*jsonutils.JSONDict)
 	var err error
diff --git a/pkg/cloudcommon/db/interface.go b/pkg/cloudcommon/db/interface.go
index aca43f4d0f..f6795eb037 100644
--- a/pkg/cloudcommon/db/interface.go
+++ b/pkg/cloudcommon/db/interface.go
@@ -62,7 +62,7 @@ type IModelManager interface {
 	AllowPerformCheckCreateData(ctx context.Context, userCred mcclient.TokenCredential, query jsonutils.JSONObject, data jsonutils.JSONObject) bool
 	PerformAction(ctx context.Context, userCred mcclient.TokenCredential, action string, query jsonutils.JSONObject, data jsonutils.JSONObject) (jsonutils.JSONObject, error)
 
-	DoCreate(ctx context.Context, userCred mcclient.TokenCredential, kwargs jsonutils.JSONObject, data jsonutils.JSONObject, realManager IModelManager) (IModel, error)
+	// DoCreate(ctx context.Context, userCred mcclient.TokenCredential, kwargs jsonutils.JSONObject, data jsonutils.JSONObject, realManager IModelManager) (IModel, error)
 
 	InitializeData() error
 
diff --git a/pkg/cloudcommon/db/modelbase.go b/pkg/cloudcommon/db/modelbase.go
index 7c5501d40a..c48df26c5d 100644
--- a/pkg/cloudcommon/db/modelbase.go
+++ b/pkg/cloudcommon/db/modelbase.go
@@ -3,7 +3,6 @@ package db
 import (
 	"context"
 	"database/sql"
-	"fmt"
 	"net/http"
 
 	"yunion.io/x/jsonutils"
@@ -162,10 +161,6 @@ func (manager *SModelBaseManager) InitializeData() error {
 	return nil
 }
 
-func (manager *SModelBaseManager) DoCreate(ctx context.Context, userCred mcclient.TokenCredential, kwargs jsonutils.JSONObject, data jsonutils.JSONObject, realManager IModelManager) (IModel, error) {
-	return nil, fmt.Errorf("Do create not implement?")
-}
-
 func (manager *SModelBaseManager) ListItemExportKeys(ctx context.Context, q *sqlchemy.SQuery, userCred mcclient.TokenCredential, query jsonutils.JSONObject) (*sqlchemy.SQuery, error) {
 	return q, nil
 }
diff --git a/pkg/cloudcommon/db/resourcebase.go b/pkg/cloudcommon/db/resourcebase.go
index c8ade4dcc9..c0f3a7ea7e 100644
--- a/pkg/cloudcommon/db/resourcebase.go
+++ b/pkg/cloudcommon/db/resourcebase.go
@@ -4,7 +4,6 @@ import (
 	"context"
 	"time"
 
-	"yunion.io/x/jsonutils"
 	"yunion.io/x/onecloud/pkg/mcclient"
 	"yunion.io/x/pkg/util/timeutils"
 	"yunion.io/x/sqlchemy"
@@ -36,14 +35,6 @@ func (manager *SResourceBaseManager) RawQuery(fields ...string) *sqlchemy.SQuery
 	return manager.SModelBaseManager.Query(fields...)
 }
 
-func (manager *SResourceBaseManager) DoCreate(ctx context.Context, userCred mcclient.TokenCredential, kwargs jsonutils.JSONObject, data jsonutils.JSONObject, realManager IModelManager) (IModel, error) {
-	ownerProjId, err := fetchOwnerProjectId(ctx, manager, userCred, kwargs)
-	if err != nil {
-		return nil, err
-	}
-	return doCreateItem(realManager, ctx, userCred, ownerProjId, nil, data)
-}
-
 func CanDelete(model IModel, ctx context.Context) bool {
 	err := model.ValidateDeleteCondition(ctx)
 	if err == nil {
diff --git a/pkg/compute/guestdrivers/baremetals.go b/pkg/compute/guestdrivers/baremetals.go
index 69fb106580..892ab43b5c 100644
--- a/pkg/compute/guestdrivers/baremetals.go
+++ b/pkg/compute/guestdrivers/baremetals.go
@@ -380,7 +380,7 @@ func (self *SBaremetalGuestDriver) StartGuestDetachdiskTask(ctx context.Context,
 }
 
 func (self *SBaremetalGuestDriver) StartGuestAttachDiskTask(ctx context.Context, userCred mcclient.TokenCredential, guest *models.SGuest, params *jsonutils.JSONDict, parentTaskId string) error {
-	return fmt.Errorf("Cannot attach disk from a baremetal serer")
+	return fmt.Errorf("Cannot attach disk to a baremetal serer")
 }
 
 func (self *SBaremetalGuestDriver) StartSuspendTask(ctx context.Context, userCred mcclient.TokenCredential, guest *models.SGuest, params *jsonutils.JSONDict, parentTaskId string) error {
diff --git a/pkg/compute/models/hosts.go b/pkg/compute/models/hosts.go
index 6133ff5940..ca77317e46 100644
--- a/pkg/compute/models/hosts.go
+++ b/pkg/compute/models/hosts.go
@@ -3272,7 +3272,7 @@ func (self *SHost) PerformConvertHypervisor(ctx context.Context, userCred mcclie
 	if err != nil {
 		return nil, httperrors.NewNotAcceptableError("Convert error: %s", err.Error())
 	}
-	guest, err := GuestManager.DoCreate(ctx, userCred, data, params, GuestManager)
+	guest, err := db.DoCreate(GuestManager, ctx, userCred, nil, params)
 	if err != nil {
 		return nil, err
 	}
diff --git a/pkg/scheduler/api/sched.go b/pkg/scheduler/api/sched.go
index c2cf22f502..0e59bed553 100644
--- a/pkg/scheduler/api/sched.go
+++ b/pkg/scheduler/api/sched.go
@@ -401,9 +401,6 @@ func (d *SchedData) fillNetworksInfo(sjson *simplejson.Json) error {
 		if err != nil || net.Idx == "" {
 			net = new(Network)
 			net.Idx = s.Get("network").MustString()
-			if net.Idx == "" {
-				return fmt.Errorf("Invalid network desc: %s", s.MustString())
-			}
 			net.Wire = s.Get("wire").MustString()
 			net.Driver = s.Get("driver").MustString()
 			net.Exit = s.Get("exit").MustBool()