fix circular import

coldfront/core/project/models.py

@@ -9,7 +9,7 @@
 from model_utils.models import TimeStampedModel
 from simple_history.models import HistoricalRecords
 
-from coldfront.core.department.models import DepartmentProject
+from coldfront.core.department.models import Department
 from coldfront.core.field_of_science.models import FieldOfScience
 from coldfront.core.utils.common import import_from_settings
 
@@ -218,9 +218,12 @@ def user_permissions(self, user):
 
         # if the user is an approver in a department connected to the project,
         # give them user permissions
-        department = DepartmentProject.objects.get(project=self).department
-        for parent_department in department.parents.filter(org_tree='Research Computing Storage Billing'):
-            if user in parent_department.useraffiliation_set.filter(role='approver'):
+        departments = Department.objects.filter(
+            org_tree='Research Computing Storage Billing'
+        )
+        proj_departments = [d for d in departments if self in d.get_projects()]
+        for department in proj_departments:
+            if user in department.useraffiliation_set.filter(role='approver'):
                 permissions.append(ProjectPermission.USER)
 
         return permissions