新增唯一键控制 序列号唯一

Model/models.py

@@ -191,7 +191,7 @@ class OrderSerialNumberModel(models.Model):
 class UserSerialNumberModel(models.Model):
     id = models.AutoField(primary_key=True)
     user = models.ForeignKey(UserModel, to_field='id', on_delete=models.CASCADE, verbose_name='关联用户表id')
-    serial_number = models.ForeignKey(SerialNumberModel, to_field='id', on_delete=models.CASCADE, verbose_name='关联序列号表')
+    serial_number = models.ForeignKey(SerialNumberModel, to_field='id',unique=True, on_delete=models.CASCADE, verbose_name='关联序列号表')
     add_time = models.IntegerField(default=0, verbose_name='添加时间')
     update_time = models.IntegerField(default=0, verbose_name='更新时间')