diff --git a/dbs/mongo/mongo.go b/dbs/mongo/mongo.go
index c0ee4ad..f1a2ec6 100644
--- a/dbs/mongo/mongo.go
+++ b/dbs/mongo/mongo.go
@@ -260,7 +260,7 @@ func (m *MongoDB) LoadOne(id string, collection_name string) (*mongo.SingleResul
 	return res, 200, nil
 }
 
-func (m *MongoDB) Search(filters dbs.Filters, collection_name string) (*mongo.Cursor, int, error) {
+func (m *MongoDB) Search(filters *dbs.Filters, collection_name string) (*mongo.Cursor, int, error) {
 	if err := m.createClient(mngoConfig.GetUrl()); err != nil {
 		return nil, 503, err
 	}
@@ -268,21 +268,21 @@ func (m *MongoDB) Search(filters dbs.Filters, collection_name string) (*mongo.Cu
 	opts.SetLimit(100)
 	targetDBCollection := CollectionMap[collection_name]
 	orList := bson.A{}
-	for k, filter := range filters.Or {
-		orList = append(orList, bson.M{
-			k: bson.M{dbs.StringToOperator(filter.Operator).ToMongoOperator(): dbs.ToValueOperator(dbs.StringToOperator(filter.Operator), filter.Value)}})
-	}
-	f := bson.D{
-		{"$or", orList},
-	}
-	if len(orList) == 0 {
-		f = bson.D{}
-	}
-	for k, filter := range filters.And {
-		f = append(f, bson.E{
-			k, bson.M{
-				dbs.StringToOperator(filter.Operator).ToMongoOperator(): dbs.ToValueOperator(dbs.StringToOperator(filter.Operator), filter.Value),
-			}})
+	f := bson.D{}
+	if filters != nil {
+		for k, filter := range filters.Or {
+			orList = append(orList, bson.M{
+				k: bson.M{dbs.StringToOperator(filter.Operator).ToMongoOperator(): dbs.ToValueOperator(dbs.StringToOperator(filter.Operator), filter.Value)}})
+		}
+		if len(orList) > 0 {
+			f = bson.D{{"$or", orList}}
+		}
+		for k, filter := range filters.And {
+			f = append(f, bson.E{
+				k, bson.M{
+					dbs.StringToOperator(filter.Operator).ToMongoOperator(): dbs.ToValueOperator(dbs.StringToOperator(filter.Operator), filter.Value),
+				}})
+		}
 	}
 
 	MngoCtx, cancel = context.WithTimeout(context.Background(), 10*time.Second)
diff --git a/models/resource_model/resource_model_mongo_accessor.go b/models/resource_model/resource_model_mongo_accessor.go
index 285e146..8765618 100644
--- a/models/resource_model/resource_model_mongo_accessor.go
+++ b/models/resource_model/resource_model_mongo_accessor.go
@@ -63,7 +63,7 @@ func (wfa *ResourceModelMongoAccessor) Search(filters *dbs.Filters, search strin
 			},
 		}
 	}
-	res_mongo, code, err := mongo.MONGOService.Search(*filters, wfa.GetType())
+	res_mongo, code, err := mongo.MONGOService.Search(filters, wfa.GetType())
 	if err != nil {
 		wfa.Logger.Error().Msg("Could not store to db. Error: " + err.Error())
 		return nil, code, err
diff --git a/models/resources/data/data_mongo_accessor.go b/models/resources/data/data_mongo_accessor.go
index 352053b..5fac39b 100644
--- a/models/resources/data/data_mongo_accessor.go
+++ b/models/resources/data/data_mongo_accessor.go
@@ -84,7 +84,7 @@ func (wfa *dataMongoAccessor) Search(filters *dbs.Filters, search string) ([]uti
 			},
 		}
 	}
-	res_mongo, code, err := mongo.MONGOService.Search(*filters, wfa.GetType())
+	res_mongo, code, err := mongo.MONGOService.Search(filters, wfa.GetType())
 	if err != nil {
 		wfa.Logger.Error().Msg("Could not store to db. Error: " + err.Error())
 		return nil, code, err
diff --git a/models/resources/datacenter/datacenter_mongo_accessor.go b/models/resources/datacenter/datacenter_mongo_accessor.go
index 6758160..f423732 100644
--- a/models/resources/datacenter/datacenter_mongo_accessor.go
+++ b/models/resources/datacenter/datacenter_mongo_accessor.go
@@ -86,7 +86,7 @@ func (wfa *datacenterMongoAccessor) Search(filters *dbs.Filters, search string)
 			},
 		}
 	}
-	res_mongo, code, err := mongo.MONGOService.Search(*filters, wfa.GetType())
+	res_mongo, code, err := mongo.MONGOService.Search(filters, wfa.GetType())
 	if err != nil {
 		wfa.Logger.Error().Msg("Could not store to db. Error: " + err.Error())
 		return nil, code, err
diff --git a/models/resources/processing/processing_mongo_accessor.go b/models/resources/processing/processing_mongo_accessor.go
index af52d4f..3368bfa 100644
--- a/models/resources/processing/processing_mongo_accessor.go
+++ b/models/resources/processing/processing_mongo_accessor.go
@@ -87,7 +87,7 @@ func (wfa *processingMongoAccessor) Search(filters *dbs.Filters, search string)
 			},
 		}
 	}
-	res_mongo, code, err := mongo.MONGOService.Search(*filters, wfa.GetType())
+	res_mongo, code, err := mongo.MONGOService.Search(filters, wfa.GetType())
 	if err != nil {
 		wfa.Logger.Error().Msg("Could not store to db. Error: " + err.Error())
 		return nil, code, err
diff --git a/models/resources/storage/storage_mongo_accessor.go b/models/resources/storage/storage_mongo_accessor.go
index dfd66a6..b4f574d 100644
--- a/models/resources/storage/storage_mongo_accessor.go
+++ b/models/resources/storage/storage_mongo_accessor.go
@@ -87,7 +87,7 @@ func (wfa *storageMongoAccessor) Search(filters *dbs.Filters, search string) ([]
 			},
 		}
 	}
-	res_mongo, code, err := mongo.MONGOService.Search(*filters, wfa.GetType())
+	res_mongo, code, err := mongo.MONGOService.Search(filters, wfa.GetType())
 	if err != nil {
 		wfa.Logger.Error().Msg("Could not store to db. Error: " + err.Error())
 		return nil, code, err
diff --git a/models/resources/workflow/workflow_mongo_accessor.go b/models/resources/workflow/workflow_mongo_accessor.go
index 623f1a6..a066d0e 100644
--- a/models/resources/workflow/workflow_mongo_accessor.go
+++ b/models/resources/workflow/workflow_mongo_accessor.go
@@ -91,7 +91,7 @@ func (wfa *workflowResourceMongoAccessor) Search(filters *dbs.Filters, search st
 			},
 		}
 	}
-	res_mongo, code, err := mongo.MONGOService.Search(*filters, wfa.GetType())
+	res_mongo, code, err := mongo.MONGOService.Search(filters, wfa.GetType())
 	if err != nil {
 		wfa.Logger.Error().Msg("Could not store to db. Error: " + err.Error())
 		return nil, code, err
diff --git a/models/workflow/workflow_mongo_accessor.go b/models/workflow/workflow_mongo_accessor.go
index e60f515..63fbcc3 100644
--- a/models/workflow/workflow_mongo_accessor.go
+++ b/models/workflow/workflow_mongo_accessor.go
@@ -171,7 +171,7 @@ func (wfa *workflowMongoAccessor) Search(filters *dbs.Filters, search string) ([
 			},
 		}
 	}
-	res_mongo, code, err := mongo.MONGOService.Search(*filters, wfa.GetType())
+	res_mongo, code, err := mongo.MONGOService.Search(filters, wfa.GetType())
 	if err != nil {
 		wfa.Logger.Error().Msg("Could not store to db. Error: " + err.Error())
 		return nil, code, err
diff --git a/models/workflow_execution/workflow_execution_mongo_accessor.go b/models/workflow_execution/workflow_execution_mongo_accessor.go
index ee40f6e..812751e 100644
--- a/models/workflow_execution/workflow_execution_mongo_accessor.go
+++ b/models/workflow_execution/workflow_execution_mongo_accessor.go
@@ -60,7 +60,7 @@ func (wfa workflowExecutionMongoAccessor) LoadAll() ([]utils.ShallowDBObject, in
 
 func (wfa *workflowExecutionMongoAccessor) Search(filters *dbs.Filters, search string) ([]utils.ShallowDBObject, int, error) {
 	objs := []utils.ShallowDBObject{}
-	res_mongo, code, err := mongo.MONGOService.Search(dbs.Filters{}, wfa.GetType())
+	res_mongo, code, err := mongo.MONGOService.Search(nil, wfa.GetType())
 	if err != nil {
 		wfa.Logger.Error().Msg("Could not store to db. Error: " + err.Error())
 		return nil, code, err
diff --git a/models/workspace/workspace_mongo_accessor.go b/models/workspace/workspace_mongo_accessor.go
index f9e7f38..f3cf693 100644
--- a/models/workspace/workspace_mongo_accessor.go
+++ b/models/workspace/workspace_mongo_accessor.go
@@ -145,7 +145,7 @@ func (wfa *workspaceMongoAccessor) Search(filters *dbs.Filters, search string) (
 			},
 		}
 	}
-	res_mongo, code, err := mongo.MONGOService.Search(*filters, wfa.GetType())
+	res_mongo, code, err := mongo.MONGOService.Search(filters, wfa.GetType())
 	if err != nil {
 		wfa.Logger.Error().Msg("Could not store to db. Error: " + err.Error())
 		return nil, code, err