智能邮箱客服初版4

model/models.py

@@ -210,7 +210,7 @@ class LangKeyClassModel(models.Model):
 
 class LangLocationModel(models.Model):
     id = models.AutoField(primary_key=True)
-    lk = models.ForeignKey(LangKeyModel, to_field='id', on_delete=models.CASCADE, verbose_name='关联词汇键表')
+    lk = models.ForeignKey(LangKeyModel, null=True, to_field='id', on_delete=models.CASCADE, verbose_name='关联词汇键表')
     filename = models.TextField(default='', null=False, verbose_name='类的路径')
     line = models.IntegerField(default=0, verbose_name='所在的类的行')