fix: batchst reuse_node逻辑完善

apps/wpm/models.py

@@ -643,9 +643,16 @@ class BatchSt(BaseModel):
             # 带有来源的批次获取，需检查批次号是否可用
             if cls.objects.filter(batch=batch).exists():
                 if reuse_node:
-                    node = cls.objects.filter(batch=batch, mio__isnull=False).order_by('-version').first()
-                    if node.material_start is not None and node.material_start != material_start:
+                    cls = cls.objects.filter(batch=batch)
+                    node:BatchSt = (cls.objects.filter(mio__isnull=False)|cls.objects.filter(
+                        material_start__isnull=True)).order_by('-version').first()
+                    if node is None:
                         raise ParseError(f"{batch}-该批次号因物料不同不可引用")
+                    elif node.material_start is None:
+                        node.material_start = material_start
+                        node.save(update_fields = ["material_start"])
+                    elif node.material_start is not None and node.material_start != material_start:
+                        raise ParseError(f"{batch}-该批次号因物料不同不可引用-{str(node.material_start)} vs {str(material_start)}")
                     return node, False
                 else:
                     latest_version = BatchSt.objects.filter(batch=batch).aggregate(Max("version"))["version__max"]