feat: route采用引用方式允许重复创建

apps/mtm/filters.py

@@ -58,5 +58,6 @@ class RouteFilter(filters.FilterSet):
             "mgroup": ["exact", "in", "isnull"],
             "mgroup__name": ["exact", "contains"],
             "mgroup__belong_dept": ["exact"],
-            "mgroup__belong_dept__name": ["exact", "contains"]
+            "mgroup__belong_dept__name": ["exact", "contains"],
+            "from_route": ["exact", "isnull"],
         }

apps/mtm/migrations/0062_auto_20250902_1122.py

@@ -0,0 +1,24 @@
+# Generated by Django 3.2.12 on 2025-09-02 03:22
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('mtm', '0061_material_img'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='route',
+            name='from_route',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='route_f', to='mtm.route', verbose_name='来源路线'),
+        ),
+        migrations.AlterField(
+            model_name='route',
+            name='parent',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='route_parent', to='mtm.route', verbose_name='上级路线'),
+        ),
+    ]

apps/mtm/models.py

@@ -415,8 +415,9 @@ class Route(CommonADModel):
     batch_bind = models.BooleanField('是否绑定批次', default=True)
     materials = models.ManyToManyField(Material, verbose_name='关联辅助物料', related_name="route_materials",
                                   through="mtm.routemat", blank=True)
-    parent = models.ForeignKey('self', verbose_name='上级路线', on_delete=models.CASCADE, null=True, blank=True)
+    parent = models.ForeignKey('self', verbose_name='上级路线', on_delete=models.CASCADE, null=True, blank=True, related_name="route_parent")
     params_json = models.JSONField('工艺参数', default=dict, blank=True)
+    from_route = models.ForeignKey('self', verbose_name='来源路线', on_delete=models.SET_NULL, null=True, blank=True, related_name="route_f")
 
     def __str__(self):
         x = ""

apps/mtm/serializers.py

@@ -247,7 +247,7 @@ class RouteSerializer(CustomModelSerializer):
             # if material and process and Route.objects.filter(material=material, process=process).exists():
             #     raise ValidationError('已选择该工序!!')
         with transaction.atomic():
-            instance = super().create(validated_data)
+            instance:Route = super().create(validated_data)
             material_out = instance.material_out
             if material_out:
                 if material_out.process is None:
@@ -263,12 +263,16 @@ class RouteSerializer(CustomModelSerializer):
                 if instance.material:
                     instance.material_out = RouteSerializer.gen_material_out(instance, material_out_tracking, user=self.request.user)
                     instance.save()
-            rx = Route.objects.filter(material_in=instance.material_in, material_out=instance.material_out, process=process).exclude(id=instance.id).first()
+            rx = Route.objects.filter(
+                material_in=instance.material_in, material_out=instance.material_out, 
+                process=process).exclude(id=instance.id).order_by("create_time").first()
             if rx:
-                msg = ""
+                instance.from_route = rx
-                if rx.routepack:
+                instance.save()
-                    msg = rx.routepack.name
+                # msg = ""
-                raise ParseError(f"该工艺步骤已存在-{msg}")
+                # if rx.routepack:
+                #     msg = rx.routepack.name
+                # raise ParseError(f"该工艺步骤已存在-{msg}")
             return instance
 
     def update(self, instance, validated_data):
@@ -294,12 +298,16 @@ class RouteSerializer(CustomModelSerializer):
                 if instance.material:
                     instance.material_out = RouteSerializer.gen_material_out(instance,  material_out_tracking, user=self.request.user)
                     instance.save()
-            rx = Route.objects.filter(material_in=instance.material_in, material_out=instance.material_out, process=process).exclude(id=instance.id).first()
+            rx = Route.objects.filter(
+                material_in=instance.material_in, material_out=instance.material_out, 
+                process=process).exclude(id=instance.id).order_by("create_time").first()
             if rx:
-                msg = ""
+                instance.from_route = rx
-                if rx.routepack:
+                instance.save()
-                    msg = rx.routepack.name
+                # msg = ""
-                raise ParseError(f"该工艺步骤已存在-{msg}")
+                # if rx.routepack:
+                #     msg = rx.routepack.name
+                # raise ParseError(f"该工艺步骤已存在-{msg}")
             return instance
 
     def to_representation(self, instance):
@@ -330,6 +338,12 @@ class RouteMatSerializer(CustomModelSerializer):
         model = RouteMat
         fields = "__all__"
         read_only_fields = EXCLUDE_FIELDS_BASE
+    
+    def validate(self, attrs):
+        route:Route = attrs["route"]
+        if route.from_route is not None:
+            raise ParseError("该工艺步骤引用其他步骤，无法修改")
+        return attrs
 
 
 class MaterialExportSerializer(CustomModelSerializer):

apps/mtm/views.py

@@ -368,12 +368,23 @@ class RouteViewSet(CustomModelViewSet):
     select_related_fields = ['material',
                              'process', 'material_in', 'material_out', 'mgroup', 'routepack']
 
-    def update(self, request, *args, **kwargs):
+    @transaction.atomic
-        obj:Route = self.get_object()
+    def perform_update(self, serializer):
-        routepack = obj.routepack
+        ins:Route = self.get_object()
+        if ins.from_route is not None:
+            raise ParseError('该工艺步骤引用其他步骤, 无法编辑')
+        old_m_in, old_m_out, process = ins.material_in, ins.material_out, ins.process
+        routepack = ins.routepack
         if routepack and routepack.state != RoutePack.RP_S_CREATE:
-            raise ParseError('该状态下不可编辑')
+            raise ParseError('该工艺路线非创建中不可编辑')
-        return super().update(request, *args, **kwargs)
+        ins_n:Route = serializer.save()
+        if ins_n.material_in != old_m_in or ins_n.material_out != old_m_out or ins_n.process != process:
+            raise ParseError("该工艺步骤被其他步骤引用, 无法修改关键信息")
+
+    def perform_destroy(self, instance:Route):
+        if Route.objects.filter(from_route=instance).exists():
+            raise ParseError('该工艺步骤被其他步骤引用，无法删除')
+        return super().perform_destroy(instance)
 
 
 class SruleViewSet(CustomModelViewSet):