SQLAlchemy introspect column type with inheritance

Question

Considering this code (and using SQLAlchemy 0.7.7):

class Document(Base):
    __tablename__ = \'document\'
    __table_args__ = {
        \'schema\': \'app\'
            


        

Answer 1

You can explore the base classes...

def find_type(class_, colname):
    if hasattr(class_, '__table__') and colname in class_.__table__.c:
        return class_.__table__.c[colname].type
    for base in class_.__bases__:
        return find_type(base, colname)
    raise NameError(colname)

print find_type(Arrete, 'date_arrete')
print find_type(Arrete, 'date')