Thanks. What about my other question? Is it possible to have two layers of classes (Document and ContactDocument) mapped to polymorphic unions?
torstai 9. heinäkuuta 2015 18.31.36 UTC+3 Michael Bayer kirjoitti: > > Thanks for reporting. Issue > https://bitbucket.org/zzzeek/sqlalchemy/issues/3480/abstractconcretebase-regression-with > > is created, create the Column objects with an explicit key for now: > > > class Document(object): > date = Column(Date) > documentType = Column('documenttype', String, key="documentType") > > > class ContactDocument(AbstractConcreteBase, Base, Document): > contactPersonName = Column('contactpersonname', String, > key="contactPersonName") > salesPersonName = Column(String) > sendMethod = Column('sendmethod', String, key="sendMethod") > > @declared_attr > def company_id(self): > return Column(ForeignKey('companies.id')) > > > > On 7/9/15 11:18 AM, Alex Grönholm wrote: > > The following script no longer works in 1.0.6, but does in 0.9.9: > > > from sqlalchemy.ext.declarative import declarative_base, > AbstractConcreteBasefrom sqlalchemy.ext.declarative.api import > declared_attrfrom sqlalchemy.orm.mapper import configure_mappersfrom > sqlalchemy.orm.session import Sessionfrom sqlalchemy.sql.schema import > Column, ForeignKeyfrom sqlalchemy.sql.sqltypes import Date, String, Integer > > Base = declarative_base() > > class Company(Base): > __tablename__ = 'companies' id = Column(Integer, primary_key=True) > > class Document(object): > date = Column(Date) > documentType = Column('documenttype', String) > > class ContactDocument(AbstractConcreteBase, Base, Document): > contactPersonName = Column('contactpersonname', String) > salesPersonName = Column(String) > sendMethod = Column('sendmethod', String) > > @declared_attr def company_id(self): > return Column(ForeignKey('companies.id')) > > class Offer(ContactDocument): > __tablename__ = 'offers' id = Column(Integer, primary_key=True) > > class SalesOrder(ContactDocument): > __tablename__ = 'orders' id = Column(Integer, primary_key=True) > > > configure_mappers() > session = Session() > query = session.query(ContactDocument)print(query) > > > > On 1.0.6, I get an error: sqlalchemy.exc.ArgumentError: When configuring > property 'documentType' on Mapper|ContactDocument|pjoin, column > 'documenttype' is not represented in the mapper's table. Use the > `column_property()` function to force this column to be mapped as a > read-only attribute. > Why am I getting this? Is this a bug or am I not understanding something? > > Also, is it possible to have both Document and ContactDocument as abstract > concrete base classes (ie. I want the union from Document to include both > the direct concrete subclasses of Document and all concrete subclasses of > ContactDocument as well)? > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sqlalchemy+...@googlegroups.com <javascript:>. > To post to this group, send email to sqlal...@googlegroups.com > <javascript:>. > Visit this group at http://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/d/optout. > > > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
