如何将 SQLAlchemy 行对象转换为 Python 字典? [英] How to convert SQLAlchemy row object to a Python dict?

问题描述

是否有一种简单的方法来迭代列名和值对?

Is there a simple way to iterate over column name and value pairs?

我的 SQLAlchemy 版本是 0.5.6

My version of SQLAlchemy is 0.5.6

这是我尝试使用 dict(row) 的示例代码:

Here is the sample code where I tried using dict(row):

import sqlalchemy
from sqlalchemy import *
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

print "sqlalchemy version:",sqlalchemy.__version__ 

engine = create_engine('sqlite:///:memory:', echo=False)
metadata = MetaData()
users_table = Table('users', metadata,
     Column('id', Integer, primary_key=True),
     Column('name', String),
)
metadata.create_all(engine) 

class User(declarative_base()):
    __tablename__ = 'users'
    
    id = Column(Integer, primary_key=True)
    name = Column(String)
    
    def __init__(self, name):
        self.name = name

Session = sessionmaker(bind=engine)
session = Session()

user1 = User("anurag")
session.add(user1)
session.commit()

# uncommenting next line throws exception 'TypeError: 'User' object is not iterable'
#print dict(user1)
# this one also throws 'TypeError: 'User' object is not iterable'
for u in session.query(User).all():
    print dict(u)

在我的系统输出上运行此代码:

Running this code on my system outputs:

Traceback (most recent call last):
  File "untitled-1.py", line 37, in <module>
    print dict(u)
TypeError: 'User' object is not iterable

推荐答案

您可以访问 SQLAlchemy 对象的内部 __dict__，如下所示:

You may access the internal __dict__ of a SQLAlchemy object, like the following:

for u in session.query(User).all():
    print u.__dict__

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