Python插入数据库提交失败，一直走IntegrityError错误，没打印错误信息(一定注意编码规范，记住打印错误信息)，以为插不进去，弄了好久，最后打印了错误信息
(sqlite3.IntegrityError) samples.file_type may not be NULL [SQL: u'INSERT INTO samples (file_size, file_type, md5, crc32, sha1, sha256, sha512, ssdeep) VALUES (?, ?, ?, ?, ?, ?, ?, ?)'] [parameters: (53, None, 'hello', 'crc32', 'sha1', 'sha256', 'sha512', None)]
提示为file_type不能为空，但是我建表的时候file_type设置的是不允许为空，而插入的时候file_type传入为NULL，所以Insert不成功，报错IntegrityError
from sqlalchemy import Column, Integer, String
from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Text, Index
from sqlalchemy.exc import SQLAlchemyError, IntegrityError
from sqlalchemy.orm import sessionmaker Base = declarative_base() class Sample(Base):
"""Submitted files details."""
__tablename__ = "samples" id = Column(Integer(), primary_key=True)
file_size = Column(Integer(), nullable=False)
file_type = Column(Text(), nullable=False)
md5 = Column(String(32), nullable=False)
crc32 = Column(String(8), nullable=False)
sha1 = Column(String(40), nullable=False)
sha256 = Column(String(64), nullable=False)
sha512 = Column(String(128), nullable=False)
ssdeep = Column(String(255), nullable=True)
__table_args__ = Index("hash_index", "md5", "crc32", "sha1",
"sha256", "sha512", unique=True), def __repr__(self):
return "<Sample('{0}','{1}')>".format(self.id, self.sha256) def __init__(self, md5, crc32, sha1, sha256, sha512,
file_size, file_type=None, ssdeep=None):
self.md5 = md5
self.sha1 = sha1
self.crc32 = crc32
self.sha256 = sha256
self.sha512 = sha512
self.file_size = file_size
if file_type:
self.file_type = file_type
if ssdeep:
self.ssdeep = ssdeep engine = create_engine("sqlite:///cuckoo.db",echo=True) #返回连接引擎 metadata = Base.metadata
metadata.create_all(engine) #连接或者创建 #sample_mike = Sample("hello", "crc32", "sha1", "sha256", "sha512", 53, None, None) #非空数据不能传空
sample_mike = Sample("hello", "crc32", "sha1", "sha256", "sha512", 53, "aa", None)
Session = sessionmaker(bind=engine) session = Session() session.add(sample_mike) #数据库会话
try:
session.commit() #提交
except IntegrityError as e:
print e
except SQLAlchemyError as e:
print e
最后在网上看到一个比较有用的工具sqlite,查看db数据库
sqlite、db、insert.py下载 http://files.cnblogs.com/files/aliflycoris/db.zip