Push BOM validation to background worker (#10727)

- Can take a significant amount of time
- Closes https://github.com/inventree/InvenTree/issues/10725

src/backend/InvenTree/part/api.py

@@ -15,6 +15,7 @@ from rest_framework import serializers
 from rest_framework.response import Response
 
 import part.filters
+import part.tasks as part_tasks
 from data_exporter.mixins import DataExportViewMixin
 from InvenTree.api import (
     BulkCreateMixin,
@@ -47,6 +48,7 @@ from InvenTree.mixins import (
     SerializerContextMixin,
     UpdateAPI,
 )
+from InvenTree.tasks import offload_task
 from stock.models import StockLocation
 
 from . import serializers as part_serializers
@@ -633,7 +635,14 @@ class PartValidateBOM(RetrieveUpdateAPI):
 
         valid = str2bool(serializer.validated_data.get('valid', False))
 
-        part.validate_bom(request.user, valid=valid)
+        # BOM validation may take some time, so we offload it to a background task
+        offload_task(
+            part_tasks.validate_bom,
+            part.pk,
+            valid,
+            user_id=request.user.pk if request and request.user else None,
+            group='part',
+        )
 
         # Re-serialize the response
         serializer = self.get_serializer(part, many=False)

src/backend/InvenTree/part/tasks.py

@@ -1,6 +1,7 @@
 """Background task definitions for the 'part' app."""
 
 from datetime import datetime, timedelta
+from typing import Optional
 
 from django.core.exceptions import ValidationError
 from django.db.models import Model
@@ -437,3 +438,35 @@ def check_bom_valid(part_id: int):
     if valid != part.bom_validated:
         part.bom_validated = valid
         part.save()
+
+
+@tracer.start_as_current_span('validate_bom')
+def validate_bom(part_id: int, valid: bool, user_id: Optional[int] = None):
+    """Run BOM validation for the specified Part.
+
+    Arguments:
+        part_id: The ID of the part for which to validate the BOM.
+        valid: Boolean indicating whether the BOM is valid or not.
+        user_id: Optional ID of the user performing the validation.
+    """
+    from django.contrib.auth import get_user_model
+
+    from part.models import Part
+
+    User = get_user_model()
+
+    try:
+        part = Part.objects.get(pk=part_id)
+    except Part.DoesNotExist:
+        logger.warning('validate_bom: Part with ID %s does not exist', part_id)
+        return
+
+    if user_id:
+        try:
+            user = User.objects.get(pk=user_id)
+        except User.DoesNotExist:
+            user = None
+    else:
+        user = None
+
+    part.validate_bom(user, valid=valid)

src/frontend/src/pages/part/PartDetail.tsx

@@ -184,7 +184,7 @@ function BomValidationInformation({
         <Text>{t`Do you want to validate the bill of materials for this assembly?`}</Text>
       </Alert>
     ),
-    successMessage: t`BOM validated`,
+    successMessage: t`Bill of materials scheduled for validation`,
     onFormSuccess: () => {
       bomInformationQuery.refetch();
     }