diff --git a/controller/northbound/server/auth_test.go b/controller/northbound/server/auth_test.go
index e5c9e7389d443c0f653f53a3c5f32966f5c2671d..956ef2be19b5da9be5eebe2636763bb7c91fe7b5 100644
--- a/controller/northbound/server/auth_test.go
+++ b/controller/northbound/server/auth_test.go
@@ -89,7 +89,13 @@ func TestAuth_Login(t *testing.T) {
 			wantErr: true,
 			validationErrors: []*validate.Violation{
 				{
-					FieldPath:    stringToPointer("username"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("username"),
+							},
+						},
+					},
 					ConstraintId: stringToPointer("required"),
 					Message:      stringToPointer("value is required"),
 				}},
@@ -160,7 +166,13 @@ func TestAuth_Logout(t *testing.T) {
 			wantErr: true,
 			validationErrors: []*validate.Violation{
 				{
-					FieldPath:    stringToPointer("username"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("username"),
+							},
+						},
+					},
 					ConstraintId: stringToPointer("required"),
 					Message:      stringToPointer("value is required"),
 				}},
diff --git a/controller/northbound/server/role_test.go b/controller/northbound/server/role_test.go
index bb787a4160530b0454d4b2c0198f47c0f9a98ffc..0b415d857189f0c0ea620d48f322dcf987e717c5 100644
--- a/controller/northbound/server/role_test.go
+++ b/controller/northbound/server/role_test.go
@@ -84,10 +84,20 @@ func TestRole_CreateRoles(t *testing.T) {
 			wantErr: true,
 			validationErrors: []*validate.Violation{
 				{
-					FieldPath:    stringToPointer("roles[0].name"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("roles"),
+							},
+							{
+								FieldName: stringToPointer("name"),
+							},
+						},
+					},
 					ConstraintId: stringToPointer("string.min_len"),
 					Message:      stringToPointer("value length must be at least 3 characters"),
-				}},
+				},
+			},
 		},
 		{
 			name: "role with too short description should fail",
@@ -105,7 +115,16 @@ func TestRole_CreateRoles(t *testing.T) {
 			want:    &apb.CreateRolesResponse{},
 			wantErr: true,
 			validationErrors: []*validate.Violation{{
-				FieldPath:    stringToPointer("roles[0].description"),
+				Field: &validate.FieldPath{
+					Elements: []*validate.FieldPathElement{
+						{
+							FieldName: stringToPointer("roles"),
+						},
+						{
+							FieldName: stringToPointer("description"),
+						},
+					},
+				},
 				ConstraintId: stringToPointer("string.min_len"),
 				Message:      stringToPointer("value length must be at least 3 characters"),
 			}},
@@ -181,9 +200,14 @@ func TestRole_GetRole(t *testing.T) {
 			wantErr: true,
 			validationErrors: []*validate.Violation{
 				{
-					FieldPath:    stringToPointer("role_name"),
-					ConstraintId: stringToPointer("required"),
-					Message:      stringToPointer("value is required"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("role_name"),
+							},
+						},
+					}, ConstraintId: stringToPointer("required"),
+					Message: stringToPointer("value is required"),
 				},
 			},
 		},
@@ -355,7 +379,16 @@ func TestRole_UpdateRoles(t *testing.T) {
 			wantErr: true,
 			validationErrors: []*validate.Violation{
 				{
-					FieldPath:    stringToPointer("roles[0].name"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("roles"),
+							},
+							{
+								FieldName: stringToPointer("name"),
+							},
+						},
+					},
 					ConstraintId: stringToPointer("string.min_len"),
 					Message:      stringToPointer("value length must be at least 3 characters"),
 				},
@@ -379,7 +412,16 @@ func TestRole_UpdateRoles(t *testing.T) {
 			wantErr: true,
 			validationErrors: []*validate.Violation{
 				{
-					FieldPath:    stringToPointer("roles[0].description"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("roles"),
+							},
+							{
+								FieldName: stringToPointer("description"),
+							},
+						},
+					},
 					ConstraintId: stringToPointer("string.min_len"),
 					Message:      stringToPointer("value length must be at least 3 characters"),
 				},
@@ -456,12 +498,24 @@ func TestRole_DeletePermissionsForRole(t *testing.T) {
 			wantErr: true,
 			validationErrors: []*validate.Violation{
 				{
-					FieldPath:    stringToPointer("role_name"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("role_name"),
+							},
+						},
+					},
 					ConstraintId: stringToPointer("required"),
 					Message:      stringToPointer("value is required"),
 				},
 				{
-					FieldPath:    stringToPointer("permissions_to_delete"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("permissions_to_delete"),
+							},
+						},
+					},
 					ConstraintId: stringToPointer("required"),
 					Message:      stringToPointer("value is required"),
 				},
diff --git a/controller/northbound/server/topology_test.go b/controller/northbound/server/topology_test.go
index 44ce77b57b19c31d5cc6292e5af5c2ac265e3a42..aca431a95fb07702b7e0973b4e4237d5581bdd19 100644
--- a/controller/northbound/server/topology_test.go
+++ b/controller/northbound/server/topology_test.go
@@ -285,27 +285,69 @@ func TestTopology_AddLink(t *testing.T) {
 			wantErr: true,
 			validationErrors: []*validate.Violation{
 				{
-					FieldPath:    stringToPointer("link.name"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("link"),
+							},
+							{
+								FieldName: stringToPointer("name"),
+							},
+						},
+					},
 					ConstraintId: stringToPointer("string.min_len"),
 					Message:      stringToPointer("value length must be at least 1 characters"),
 				},
 				{
-					FieldPath:    stringToPointer("link.sourceNode"),
-					ConstraintId: stringToPointer("required"),
-					Message:      stringToPointer("value is required"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("link"),
+							},
+							{
+								FieldName: stringToPointer("sourceNode"),
+							},
+						},
+					}, ConstraintId: stringToPointer("required"),
+					Message: stringToPointer("value is required"),
 				},
 				{
-					FieldPath:    stringToPointer("link.targetNode"),
-					ConstraintId: stringToPointer("required"),
-					Message:      stringToPointer("value is required"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("link"),
+							},
+							{
+								FieldName: stringToPointer("targetNode"),
+							},
+						},
+					}, ConstraintId: stringToPointer("required"),
+					Message: stringToPointer("value is required"),
 				},
 				{
-					FieldPath:    stringToPointer("link.sourcePort"),
-					ConstraintId: stringToPointer("required"),
-					Message:      stringToPointer("value is required"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("link"),
+							},
+							{
+								FieldName: stringToPointer("sourcePort"),
+							},
+						},
+					}, ConstraintId: stringToPointer("required"),
+					Message: stringToPointer("value is required"),
 				},
 				{
-					FieldPath:    stringToPointer("link.targetPort"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("link"),
+							},
+							{
+								FieldName: stringToPointer("targetPort"),
+							},
+						},
+					},
 					ConstraintId: stringToPointer("required"),
 					Message:      stringToPointer("value is required"),
 				},
@@ -461,7 +503,13 @@ func TestTopology_DeleteLink(t *testing.T) {
 			wantErr: true,
 			validationErrors: []*validate.Violation{
 				{
-					FieldPath:    stringToPointer("id"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("id"),
+							},
+						},
+					},
 					ConstraintId: stringToPointer("required"),
 					Message:      stringToPointer("value is required"),
 				}},
diff --git a/controller/northbound/server/user_test.go b/controller/northbound/server/user_test.go
index 4a1c663279ce5607a40ff3dd1fd8d87f03d7e0bf..2013827091288219e37ac3abd8d98a5a2a40fb1c 100644
--- a/controller/northbound/server/user_test.go
+++ b/controller/northbound/server/user_test.go
@@ -90,9 +90,17 @@ func TestUser_CreateUsers(t *testing.T) {
 			wantErr: true,
 			validationErrors: []*validate.Violation{
 				{
-					FieldPath:    stringToPointer("user[0].password"),
-					ConstraintId: stringToPointer("string.min_len"),
-					Message:      stringToPointer("value length must be at least 5 characters"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("user"),
+							},
+							{
+								FieldName: stringToPointer("password"),
+							},
+						},
+					}, ConstraintId: stringToPointer("string.min_len"),
+					Message: stringToPointer("value length must be at least 5 characters"),
 				}},
 		},
 		{
@@ -116,9 +124,17 @@ func TestUser_CreateUsers(t *testing.T) {
 			wantErr: true,
 			validationErrors: []*validate.Violation{
 				{
-					FieldPath:    stringToPointer("user[0].name"),
-					ConstraintId: stringToPointer("string.min_len"),
-					Message:      stringToPointer("value length must be at least 3 characters"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("user"),
+							},
+							{
+								FieldName: stringToPointer("name"),
+							},
+						},
+					}, ConstraintId: stringToPointer("string.min_len"),
+					Message: stringToPointer("value length must be at least 3 characters"),
 				}},
 		},
 	}
@@ -190,9 +206,14 @@ func TestUser_GetUser(t *testing.T) {
 			wantErr: true,
 			validationErrors: []*validate.Violation{
 				{
-					FieldPath:    stringToPointer("name"),
-					ConstraintId: stringToPointer("required"),
-					Message:      stringToPointer("value is required"),
+					Field: &validate.FieldPath{
+						Elements: []*validate.FieldPathElement{
+							{
+								FieldName: stringToPointer("name"),
+							},
+						},
+					}, ConstraintId: stringToPointer("required"),
+					Message: stringToPointer("value is required"),
 				}},
 		},
 	}