Python调用Orator ORM进行数据库操作

pip install orator

from orator import DatabaseManager, Model

# 配置数据库连接
config = {
    'sqlite': {
        'driver': 'sqlite',
        'database': 'example.db'
    }
}

db = DatabaseManager(config)
Model.set_connection_resolver(db)

from orator import Model

class User(Model):
    __fillable__ = ['name', 'email', 'age']  # 可批量赋值的字段

# 创建一个新用户
user = User.create({'name': 'John', 'email': 'john@example.com', 'age': 30})

# 查询单个用户
user = User.find(1)  # 根据主键查找
print(user.name, user.email)

# 查询所有用户
users = User.all()
for user in users:
    print(user.name)

# 更新用户数据
user = User.find(1)
user.update({'age': 31})

# 删除用户
user.delete()

# 查询：获取所有年龄大于30的用户
users = User.where('age', '>', 30).get()
for user in users:
    print(user.name)

# 排序：按年龄升序排列
users = User.order_by('age').get()

# 聚合：计算所有用户的平均年龄
average_age = User.avg('age')
print("Average age:", average_age)

# 创建迁移文件
orator migrate:make create_users_table

# 运行迁移
orator migrate:run

from orator import Model

class Post(Model):
    __fillable__ = ['title', 'body']
    
    # 定义一对多关系
    def comments(self):
        return self.has_many(Comment)

class Comment(Model):
    __fillable__ = ['post_id', 'body']