Django交互命令常见问题和解决方法

Tracking file by folder pattern:  migrations
You are trying to add a non-nullable field 'slug' to category without a default; we can't do that (the database needs something to populate existing rows).
Please select a fix:
 1) Provide a one-off default now (will be set on all existing rows)
 2) Quit, and let me add a default in models.py
Select an option: 

触发命令：makemigrations APP名称

命令作用：更新生成迁移数据表

解决方法：键入  ' ' （空字符串），表示我们用空字符串来填充slug字段