Django知识小问答
Django知识小问答
关于makemigrations
问：我用python manage.py makemigrations怎么没能将我的model文件生成数据？
答：可以給我看下model的文件目录吗？
问：目录是这样的(venv) G:\git\bigbooom\bigboomm\citizen>tree /f
卷 study 的文件夹 PATH 列表
卷序列号为 0000000F B64E:66E1
G:.
models.py
models.pyc
__init__.py
__init__.pyc
答：嗯嗯，我知道，我想你应该是少了一个migrations的文件夹吧，所以他不知道你需要生成migrations，你试试在citizen文件夹下面建一个migrations，记得要在里面加一个init.py哦，不然也是不可以的
问：啊，可以了~~ Good Job(venv) G:\git\bigbooom\bigboomm>python manage.py makemigrations
Migrations for 'citizen':
citizen\migrations\0001_initial.py:
- Create model Citizen
答：其实，一般Django中建app建议用
## cryptography 错误
报`RuntimeError: cryptography is required for sha256_password or caching_sha2_password`错：
File “C:\Users\shikanon\Desktop\新建文件夹\venv\lib\site-packages\pymysql\connections.py”, line 325, in init
self.connect()
File “C:\Users\shikanon\Desktop\新建文件夹\venv\lib\site-packages\pymysql\connections.py”, line 599, in connect
self._request_authentication()
File “C:\Users\shikanon\Desktop\新建文件夹\venv\lib\site-packages\pymysql\connections.py”, line 882, in _request_authentication
auth_packet = _auth.caching_sha2_password_auth(self, auth_packet)
File “C:\Users\shikanon\Desktop\新建文件夹\venv\lib\site-packages\pymysql_auth.py”, line 264, in caching_sha2_password_auth
data = sha2_rsa_encrypt(conn.password, conn.salt, conn.server_public_key)
File “C:\Users\shikanon\Desktop\新建文件夹\venv\lib\site-packages\pymysql_auth.py”, line 142, in sha2_rsa_encrypt
raise RuntimeError(“cryptography is required for sha256_password or caching_sha2_password”)
RuntimeError: cryptography is required for sha256_password or caching_sha2_password
只要安装`cryptography`包就可以了：
```pip install cryptography
