没有为查询获取数据（表类）。all（）-sqlalchemy ORM

我试图简单地执行“select*fromtable”，但它返回的是一个空列表

import os

from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from sqlalchemy import Column, Integer, String, text

SQLALCHEMY_DATABASE_URL = "postgres+psycopg2://postgres:pwd@localhost:5432/postgres"

engine = create_engine(SQLALCHEMY_DATABASE_URL)
SessionLocal = sessionmaker(engine)

Base = declarative_base()
    
class CPMyTable(Base):
    __tablename__ = 'cp.my_table'

    c_id = Column(Integer)
    c_s_id = Column(Integer, primary_key=True)
    c_s = Column(String)
    
db_session = SessionLocal()
Base.metadata.create_all(engine)

print(db_session.query(CPMyTable).all())

输出：

[]

我正在查询的表的DDL为：

CREATE TABLE cp.my_table (
    c_id int4 NULL,
    c_s_id serial NOT NULL,
    c_s text NULL,
    CONSTRAINT mytable_pk PRIMARY KEY (c_s_id)
);

---

可能的问题是什么？

您应该使用

\u table\u args\u

来指定模式

class CPMyTable(Base):
    __tablename__ = 'my_table'
    __table_args__ = {'schema': 'cp'}

    c_id = Column(Integer)
    c_s_id = Column(Integer, primary_key=True)
    c_s = Column(String)