Python ORM 框架 quick_orm

• 授权协议: BSD
• 开发语言: Python
• 操作系统: 跨平台
• 软件首页: https://github.com/tylerlong/quick_orm
• 软件文档: https://github.com/tylerlong/quick_orm

软件介绍

quick_orm 是一个 Python 的 ORM 框架. 安装和使用超级简单, 可以一分钟上手! 基于SQLAlchemy构建, 在功能上是SQLAlchemy的超集. quick_orm 最大的特点是以非常简单易学易用的形式提供了完备强大的功能.

安装

pip install quick_orm

Hello World 示例

from quick_orm.core import Database
from sqlalchemy import Column, String

__metaclass__ = Database.DefaultMeta

class User:
    name = Column(String(30))

Database.register()

if __name__ == '__main__':
    db = Database('sqlite://') # database urls: http://docs.sqlalchemy.org/en/latest/core/engines.html#database-urls
    db.create_tables() # create tables, you don't have to write any SQL.

    user = User(name = 'Hello World')
    db.session.add_then_commit(user) # commit user to database.

    user = db.session.query(User).get(1)
    print 'My name is', user.name
    print 'created_at', user.created_at # created_at and updated_at timestamps are added automatically.
    print 'updated_at', user.updated_at

    user.name = 'Tyler Long'
    db.session.commit() # commit changes to database.
    print 'My name is', user.name
    print 'created_at', user.created_at
    print 'updated_at', user.updated_at

问答网站数据建模 示例

from quick_orm.core import Database
from sqlalchemy import Column, String, Text

__metaclass__ = Database.DefaultMeta

class User:
    name = Column(String(70))

@Database.many_to_one(User)
class Post:
    content = Column(Text)

class Question(Post):
    title = Column(String(70))

@Database.many_to_one(Question)
class Answer(Post):
    pass

@Database.many_to_one(Post)
class Comment(Post):
    pass

@Database.many_to_many(Post)
class Tag:
    name = Column(String(70))

Database.register()


#以上是建模部分, 下面是如何使用数据模型


if __name__ == '__main__':
    db = Database('sqlite://')
    db.create_tables()

    user1 = User(name = 'Tyler Long')
    user2 = User(name = 'Peter Lau')

    tag1 = Tag(name = 'quick_orm')
    tag2 = Tag(name = 'nice')

    question = Question(user = user1, title = 'What is quick_orm?', content = 'What is quick_orm?', tags = [tag1, ])
    question2 = Question(user = user1, title = 'Have you tried quick_orm?', content = 'Have you tried quick_orm?', tags = [tag1, ])

    answer = Answer(user = user1, question = question, tags = [tag1, ],
        content = 'quick_orm is a Python ORM framework which enables you to get started in less than a minute!')

    comment1 = Comment(user = user2, content = 'good question', post = question)
    comment2 = Comment(user = user2, content = 'nice answer', post = answer, tags = [tag2, ])

    db.session.add_all_then_commit([question, question2, answer, comment1, comment2, tag1, tag2, ])

    question = db.session.query(Question).get(1)
    print 'tags for question "{0}": "{1}"'.format(question.title, ', '.join(tag.name for tag in question.tags))
    print 'new comment for question:', question.comments.first().content
    print 'new comment for answer:', question.answers.first().comments.first().content

    user = db.session.query(User).filter_by(name = 'Peter Lau').one()
    print 'Peter Lau has posted {0} comments'.format(user.comments.count())

    tag = db.session.query(Tag).filter_by(name = 'quick_orm').first()
    print '{0} questions are tagged "quick_orm"'.format(tag.questions.count())

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