Python 联合子查询的SqlAlchemy groupby
我需要在同一个表上执行3个查询，合并它们，然后使用sum执行groupby 这是我的解决方案Python 联合子查询的SqlAlchemy groupby,python,sqlalchemy,flask-sqlalchemy,Python,Sqlalchemy,Flask Sqlalchemy,我需要在同一个表上执行3个查询，合并它们，然后使用sum执行groupby 这是我的解决方案 q1 = Contact.query.with_entities(Contact.name, Contact.surname, Contact.company, literal(1).label('weight')).filter(Contact.name.ilike(expr)) q2 = Contact.query.with_entities(Contact.name, Contact.surnam
q1 = Contact.query.with_entities(Contact.name, Contact.surname, Contact.company, literal(1).label('weight')).filter(Contact.name.ilike(expr))
q2 = Contact.query.with_entities(Contact.name, Contact.surname, Contact.company, literal(2).label('weight')).filter(Contact.surname.ilike(expr))
q3 = Contact.query.with_entities(Contact.name, Contact.surname, Contact.company, literal(3).label('weight')).filter(Contact.company.ilike(expr))
qq = q1.union_all(q2,q3).subquery()
w = db.session.query(qq.c.name, qq.c.surname, qq.c.company, func.sum(qq.c.weight)).group_by(qq.c.name).all()
Traceback (most recent call last)
File "/home/user1/pyweb/profc/env/lib/python3.8/site-packages/sqlalchemy/util/_collections.py", line 210, in __getattr__
return self._data[key]
During handling of the above exception, another exception occurred:
File "/home/user1/pyweb/profc/env/lib/python3.8/site-packages/flask/app.py", line 2463, in __call__
return self.wsgi_app(environ, start_response)
File "/home/user1/pyweb/profc/env/lib/python3.8/site-packages/flask/app.py", line 2449, in wsgi_app
response = self.handle_exception(e)
File "/home/user1/pyweb/profc/env/lib/python3.8/site-packages/flask/app.py", line 1866, in handle_exception
reraise(exc_type, exc_value, tb)
File "/home/user1/pyweb/profc/env/lib/python3.8/site-packages/flask/_compat.py", line 39, in reraise
raise value
File "/home/user1/pyweb/profc/env/lib/python3.8/site-packages/flask/app.py", line 2446, in wsgi_app
response = self.full_dispatch_request()
File "/home/user1/pyweb/profc/env/lib/python3.8/site-packages/flask/app.py", line 1951, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/home/user1/pyweb/profc/env/lib/python3.8/site-packages/flask/app.py", line 1820, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/home/user1/pyweb/profc/env/lib/python3.8/site-packages/flask/_compat.py", line 39, in reraise
raise value
File "/home/user1/pyweb/profc/env/lib/python3.8/site-packages/flask/app.py", line 1949, in full_dispatch_request
rv = self.dispatch_request()
File "/home/user1/pyweb/profc/env/lib/python3.8/site-packages/flask/app.py", line 1935, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/home/user1/pyweb/profc/env/lib/python3.8/site-packages/flask_login/utils.py", line 272, in decorated_view
return func(*args, **kwargs)
File "/home/user1/pyweb/profc/app/routes_contact.py", line 42, in contact
w = db.session.query(qq.c.name, qq.c.surname, qq.c.company, func.sum(qq.c.weight)).group_by(qq.c.name).all()
File "/home/user1/pyweb/profc/env/lib/python3.8/site-packages/sqlalchemy/util/_collections.py", line 212, in __getattr__
[Open an interactive python shell in this frame] raise AttributeError(key)
AttributeError: name
q1 = Contact.query.with_entities(Contact.name.label('uname'), Contact.surname.label('usurname'), Contact.company.label('ucompany'), literal(1).label('weight')).filter(Contact.name.ilike(expr))
q2 = Contact.query.with_entities(Contact.name.label('uname'), Contact.surname.label('usurname'), Contact.company.label('ucompany'), literal(2).label('weight')).filter(Contact.surname.ilike(expr))
q3 = Contact.query.with_entities(Contact.name.label('uname'), Contact.surname.label('usurname'), Contact.company.label('ucompany'), literal(3).label('weight')).filter(Contact.company.ilike(expr))
qq = q1.union_all(q2,q3).subquery()
w = db.session.query(qq.c.uname, qq.c.usurname, qq.c.ucompany, func.sum(qq.c.weight)).group_by(qq.c.uname).all()
在哪一条线上？提供完整回溯请使用完整错误编辑的邮件在调试器中进行的实验表明列名有别名，可能类似于
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