diff --git a/apps/tickets/api/ticket.py b/apps/tickets/api/ticket.py
index 747066b0c..712d4b6fa 100644
--- a/apps/tickets/api/ticket.py
+++ b/apps/tickets/api/ticket.py
@@ -34,10 +34,10 @@ class TicketViewSet(CommonApiMixin, viewsets.ModelViewSet):
     model = Ticket
     filterset_class = filters.TicketFilter
     search_fields = [
-        'title', 'type', 'status', 'applicant_display'
+        'title', 'type', 'status'
     ]
     ordering_fields = (
-        'title', 'applicant_display', 'status', 'state',
+        'title', 'status', 'state',
         'action_display', 'date_created', 'serial_num',
     )
     ordering = ('-date_created',)
@@ -67,7 +67,8 @@ class TicketViewSet(CommonApiMixin, viewsets.ModelViewSet):
 
     @action(detail=False, methods=[POST], permission_classes=[RBACPermission, ])
     def open(self, request, *args, **kwargs):
-        return super().create(request, *args, **kwargs)
+        with tmp_to_root_org():
+            return super().create(request, *args, **kwargs)
 
     @action(detail=True, methods=[PUT], permission_classes=[IsAssignee, ])
     def approve(self, request, *args, **kwargs):
diff --git a/apps/tickets/models/ticket/general.py b/apps/tickets/models/ticket/general.py
index b8f192a9d..2e8f1d886 100644
--- a/apps/tickets/models/ticket/general.py
+++ b/apps/tickets/models/ticket/general.py
@@ -189,7 +189,7 @@ class StatusMixin:
                 assignees_display.append(str(i.assignee))
                 if state != StepState.pending and state == i.state:
                     processor = i.assignee
-                if state != StepState.closed:
+                if state == StepState.closed:
                     processor = self.applicant
             step_info = {
                 'state': state,
diff --git a/apps/tickets/serializers/ticket/apply_application.py b/apps/tickets/serializers/ticket/apply_application.py
index b2774e420..1b5165bbd 100644
--- a/apps/tickets/serializers/ticket/apply_application.py
+++ b/apps/tickets/serializers/ticket/apply_application.py
@@ -26,15 +26,9 @@ class ApplyApplicationSerializer(BaseApplyAssetApplicationSerializer, TicketAppl
         extra_kwargs = {}
         extra_kwargs.update(ticket_extra_kwargs)
 
-    def validate_apply_applications(self, apply_applications):
-        type = self.initial_data.get('apply_type')
-        org_id = self.initial_data.get('org_id')
-        application_ids = [app.id for app in apply_applications]
-        with tmp_to_org(org_id):
-            applications = Application.objects.filter(
-                id__in=application_ids, type=type
-            ).values_list('id', flat=True)
-        return list(applications)
+    def validate_apply_applications(self, applications):
+        tp = self.initial_data.get('apply_type')
+        return self.filter_many_to_many_field(Application, applications, type=tp)
 
 
 class ApplyApplicationDisplaySerializer(ApplyApplicationSerializer):
diff --git a/apps/tickets/serializers/ticket/apply_asset.py b/apps/tickets/serializers/ticket/apply_asset.py
index 3c8e0aade..fe54eadeb 100644
--- a/apps/tickets/serializers/ticket/apply_asset.py
+++ b/apps/tickets/serializers/ticket/apply_asset.py
@@ -4,6 +4,7 @@ from rest_framework import serializers
 from perms.serializers.base import ActionsField
 from perms.models import AssetPermission
 from orgs.utils import tmp_to_org
+from assets.models import Asset, Node
 
 from tickets.models import ApplyAssetTicket
 from .ticket import TicketApplySerializer
@@ -34,6 +35,12 @@ class ApplyAssetSerializer(BaseApplyAssetApplicationSerializer, TicketApplySeria
         }
         extra_kwargs.update(ticket_extra_kwargs)
 
+    def validate_apply_nodes(self, nodes):
+        return self.filter_many_to_many_field(Node, nodes)
+
+    def validate_apply_assets(self, assets):
+        return self.filter_many_to_many_field(Asset, assets)
+
     def validate(self, attrs):
         attrs = super().validate(attrs)
         if not attrs.get('apply_nodes') and not attrs.get('apply_assets'):
diff --git a/apps/tickets/serializers/ticket/common.py b/apps/tickets/serializers/ticket/common.py
index ef52c14d3..4a375465e 100644
--- a/apps/tickets/serializers/ticket/common.py
+++ b/apps/tickets/serializers/ticket/common.py
@@ -3,6 +3,7 @@ from django.db.models import Model
 from django.utils.translation import ugettext as _
 from rest_framework import serializers
 
+from assets.models import SystemUser
 from orgs.utils import tmp_to_org
 from tickets.models import Ticket
 
@@ -37,6 +38,16 @@ class DefaultPermissionName(object):
 class BaseApplyAssetApplicationSerializer(serializers.Serializer):
     permission_model: Model
 
+    def filter_many_to_many_field(self, model, values: list, **kwargs):
+        org_id = self.initial_data.get('org_id')
+        ids = [instance.id for instance in values]
+        with tmp_to_org(org_id):
+            qs = model.objects.filter(id__in=ids, **kwargs).values_list('id', flat=True)
+        return list(qs)
+
+    def validate_apply_system_users(self, system_users):
+        return self.filter_many_to_many_field(SystemUser, system_users)
+
     def validate(self, attrs):
         attrs = super().validate(attrs)