Конкретно пересмотрел логику работы. Легаси вынесена в архив

manufacturing/admin.py

@@ -1,12 +1,21 @@
 from django.contrib import admin
 
-from .models import BOM, ProductEntity, RouteStub
+from .models import BOM, EntityOperation, Operation, ProductEntity
 
 
-@admin.register(RouteStub)
-class RouteStubAdmin(admin.ModelAdmin):
-    list_display = ('name',)
-    search_fields = ('name',)
+@admin.register(Operation)
+class OperationAdmin(admin.ModelAdmin):
+    list_display = ('name', 'code', 'workshop')
+    search_fields = ('name', 'code')
+    list_filter = ('workshop',)
+    autocomplete_fields = ('workshop',)
+
+
+class EntityOperationInline(admin.TabularInline):
+    model = EntityOperation
+    fields = ('seq', 'operation')
+    autocomplete_fields = ('operation',)
+    extra = 5
 
 
 class BOMChildInline(admin.TabularInline):
@@ -31,8 +40,8 @@ class ProductEntityAdmin(admin.ModelAdmin):
     )
     list_filter = ('entity_type', 'planned_material__category')
     search_fields = ('drawing_number', 'name', 'planned_material__name', 'planned_material__full_name')
-    autocomplete_fields = ('planned_material', 'route')
-    inlines = (BOMChildInline,)
+    autocomplete_fields = ('planned_material',)
+    inlines = (EntityOperationInline, BOMChildInline,)
 
 
 @admin.register(BOM)