Clean-up intiail commit for Host filter / DynamicInventory

awx/main/models/inventory.py

@@ -20,7 +20,11 @@ from django.utils.timezone import now
 # AWX
 from awx.api.versioning import reverse
 from awx.main.constants import CLOUD_PROVIDERS
-from awx.main.fields import ImplicitRoleField, JSONBField
+from awx.main.fields import (
+    ImplicitRoleField,
+    JSONBField,
+    DynamicFilterField,
+)
 from awx.main.managers import HostManager
 from awx.main.models.base import * # noqa
 from awx.main.models.unified_jobs import * # noqa
@@ -99,6 +103,13 @@ class Inventory(CommonModelNameNotUnique, ResourceMixin):
         editable=False,
         help_text=_('Number of external inventory sources in this inventory with failures.'),
     )
+    host_filter = DynamicFilterField(
+        blank=True,
+        null=True,
+        default=None,
+        help_text=_('Filter that will be applied to the hosts of this inventory.'),
+    )
+
     admin_role = ImplicitRoleField(
         parent_role='organization.admin_role',
     )