考虑以下代码:
import pymysql
db= pymysql.connect("localhost","root","","raspi")
cursor = db.cursor()
cursor.execute("INSERT INTO access(username)VALUES('hello')")
db.commit()
db.close()
当我运行它时,会出现此错误:
C:\Python36\lib\site-packages\pymysql\cursors.py:165: Warning: (1364,"Field'salt' doesn't have a default value")result = self._query(query)
如何忽略pymysql警告?
答案 0 :(得分:9)
之所以会出现此错误,是因为您的salt
字段不允许使用NULL值,但您尝试插入它们,可能是您的表创建sql代码看起来像这样:
CREATE TABLE `access` (
`username` VARCHAR(50) NULL DEFAULT NULL COLLATE 'utf8_unicode_ci',
...
`salt` VARCHAR(50) NOT NULL COLLATE 'utf8_unicode_ci'
)
COLLATE='utf8_unicode_ci'
ENGINE=InnoDB
;
如果您只想允许该字段为NULL值,则可能需要将您的SQL代码更改为以下内容:
...
`salt` VARCHAR(50) NULL COLLATE 'utf8_unicode_ci'
...
无论如何,如果您仍然坚持保持原始的数据库结构并想学习如何过滤掉警告,则可以通过以下一种可行的方法来实现:
import pymysql
import warnings
db = pymysql.connect("localhost", "root", "", "raspi")
with warnings.catch_warnings():
warnings.simplefilter("ignore")
cursor = db.cursor()
cursor.execute("INSERT INTO access(username)VALUES('hello')")
db.commit()
db.close()
有关更多信息,请查看warnings docs