add: README.md新增打印sql语句配置项说明

README.md

@@ -9,8 +9,8 @@
 # requirements:
 django 3.1.4
 
-## 查询是否有未运行的migration，前面没得X的就是没运行的:
-`
+#### 查询是否有未运行的migration，前面没得X的就是没运行的:
+```shell
 PS C:\Program Files\Python36> .\python.exe E:\datacenter\manage.py showmigrations
 E:\datacenter\utils\views.py:29: CryptographyDeprecationWarning: Python 3.6 is no longer supported by the Python core team. Therefore, support for it is deprecated in cryptography and will be removed in a future release.
   from cryptography.fernet import Fernet
@@ -28,4 +28,25 @@ auth
  [X] 0007_alter_validators_add_error_messages
  [X] 0008_alter_user_username_max_length
  [X] 0009_alter_user_last_name_max_length
-`
\ No newline at end of file
+```
+
+#### debug打印sql语句，settings.py中加入：
+```python
+LOGGING = {
+    'version': 1,
+    'disable_existing_loggers': False,
+    'handlers': {
+        'console': {
+            'level': 'DEBUG',
+            'class': 'logging.StreamHandler',
+        },
+    },
+    'loggers': {
+        'django.db.backends': {
+            'handlers': ['console'],
+            'propagate': True,
+            'level': 'DEBUG',
+        },
+    }
+}
+```