Hi, I'm Witold and learn Sqlalchemy :)
I have a little problem, here it is:
This is my DB:
class Addressess(Base):
__tablename__ = 'addressess'
id = Column('id', Integer, Sequence('address_id_seq'),
primary_key=True, index=True, unique=True, nullable=False)
street = Column('street', String(200))
house_no = Column('house_no', Integer())
place = Column('place', String(200))
postal_code = Column('postal_code', String(200))
post = Column('post', String(200))
def __init__(self, street, house_no):
self.street = street
self.house_no = house_no
def __repr__(self):
return u'%s, %s, %s' % (self.place, self.street, self.house_no)
class Price(Base):
__tablename__ = 'prices'
id = Column('id', Integer, Sequence('price_id_seq'), primary_key=True,
index=True, unique=True, nullable=False)
price = Column('price', String(200))
extra = Column('extra', String(200), nullable=True)
def __init__(self, price, extra=None):
self.price = price
self.extra = extra
def __repr__(self):
return u'%s (%s)' % (self.price, self.extra)
class Person(Base):
__tablename__ = 'person'
id = Column('id', Integer, Sequence('person_id_seq'), primary_key=True,
index=True, unique=True, nullable=False)
name = Column('name', String(200))
surname = Column('surname', String(200))
gender = Column('gender', Boolean, unique=False)
pesel = Column('pesel', Numeric(11, 0))
phone = Column('phone', Numeric(9, 0))
email = Column('email', String(200))
no_card = Column('no_card', String(10))
status = Column('status', Integer)
student = Column('student', Boolean, unique=False)
group_leader_id = Column(Integer, ForeignKey('person.id'),
nullable=True)
group_leader = relationship("Person", remote_side=[id],
primaryjoin="Person.id==Person.group_leader_id")
addressess_id = Column(Integer, ForeignKey('addressess.id'),
nullable=True)
addressess = relationship("Addressess", backref=backref("person",
uselist=False))
price_id = Column(Integer, ForeignKey('prices.id'), nullable=True)
price = relationship("Price", backref=backref("person", uselist=False))
@validates('email')
def validate_email(self, key, address):
assert '@' in address
return address
def __init__(self, name, surname):
self.name = name
self.surname = surname
def __repr__(self):
return u'%s %s, %s' % (self.name, self.surname, self.pesel)
class Group(Base):
__tablename__ = 'group'
id = Column('id', Integer, Sequence('person_id_seq'), primary_key=True,
index=True, unique=True, nullable=False)
name = Column('email', String(200))
leader_id = Column(Integer, ForeignKey('person.id'))
leader = relationship("Person")
addressess_id = Column(Integer, ForeignKey('addressess.id'))
addressess = relationship("Addressess")
def __init__(self, name):
self.name = name
def __repr__(self):
return u'%s' % self.name
association_table = Table('association', Base.metadata,
Column('person_id', Integer, ForeignKey('person.id')),
Column('projects_id', Integer, ForeignKey('projects.id'))
)
class Projects(Base):
__tablename__ = 'projects'
id = Column('id', Integer, Sequence('person_id_seq'), primary_key=True,
index=True, unique=True, nullable=False)
name = Column('name', String(200))
subject = Column('subject', String(200))
supervisor_id = Column(Integer, ForeignKey('person.id'))
supervisor = relationship("Person")
students = relationship("Person", secondary=association_table,
backref="projects")
def __init__(self, name, subject):
self.name = name
self.subject = subject
def __repr__(self):
return u'%s' % self.subject
I have a problem with update record:
This is work:
1.
session.query(Person).filter(Person.phone.like('%89%')).update({Person.no_card:
u'Usunięto'}, synchronize_session=False)
2. session.query(Person).join(Person.group_leader,
aliased=True).filter(or_(Person.name == 'Jan', Person.surname ==
'Nowak')) .update({Person.name:u'Łukasz'}, synchronize_session=False)
But this is not work:
3.
session.query(Price).join(Person).filter(Person.name.like('J%')).update({Price.extra:
20000}, synchronize_session=False)
ERROR:
OperationalError at /sqlalchemy/test_alchemy/
(OperationalError) near "FROM": syntax error u'UPDATE prices SET extra=?
FROM person WHERE person.name LIKE ?' (20000, 'J%')
4.
session.query(Addressess).join(Person.addressess).filter(Person.surname.like('%k')).filter(sqlalchemy.not_(Person.surname.like('%o%'))).update({Addressess.house_no:
10}, synchronize_session=False)
ERROR:
OperationalError at /sqlalchemy/test_alchemy/
(OperationalError) near "FROM": syntax error u'UPDATE addressess SET
house_no=? FROM person WHERE person.surname LIKE ? AND person.surname NOT
LIKE ?' (10, '%k', '%o%')
5. session.query(Projects).join(Person,
Projects.students).filter(Person.gender==False).filter(Person.name.like('M%')).update({Projects.supervisor_id:
1}, synchronize_session=False)
ERROR:
OperationalError at /sqlalchemy/test_alchemy/
(OperationalError) near "FROM": syntax error u'UPDATE projects SET
supervisor_id=? FROM person WHERE person.gender = 0 AND person.name LIKE ?'
(1, 'M%')
When i use only select and count this is work:
3. session.query(Price).join(Person).filter(Person.name.like('J%')).count()
4.
session.query(Addressess).join(Person.addressess).filter(Person.surname.like('%k')).filter(sqlalchemy.not_(Person.surname.like('%o%'))).count()
5. session.query(Projects).join(Person,
Projects.students).filter(Person.gender==False).filter(Person.name.like('M%')).count()
How to update this field?
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