Comments (1)
I think this is better done on my side:
from sqlalchemy import *
from sqla_wrapper import SQLAlchemy
from sqla_wrapper.model import NameMetaMixin
from sqlalchemy.ext.declarative import DeclarativeMeta
class _NameMetaMixin(NameMetaMixin):
def __init__(cls, name, bases, dic):
super().__init__(name,bases,dic)
cls.__table_args__ = {'extend_existing':True}
class _MetaClass(_NameMetaMixin, DeclarativeMeta):
pass
_db = SQLAlchemy(metaclass=_MetaClass)
_C = Column
class Model(_db.Model):
ID = _C(String,primary_key=True,autoincrement=False)
#other = _C(String)
Then changing fields, e.g. including other
, does not produce an error
sqlalchemy.exc.InvalidRequestError: Table 'mymappedclass' is already defined for this MetaData instance. Specify 'extend_existing=True' to redefine options and columns on an existing Table object.
Without sqla-wrapper
:
from sqlalchemy.ext.declarative import as_declarative
from sqlalchemy.ext.declarative.api import declared_attr
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
@declared_attr
def __table_args__(cls):
return {'extend_existing':True}
ID = C(String,primary_key=True,autoincrement=False)
class MyMappedClass(Base):
other = C(String)
#yetother = C(String)
#MyMappedClass.metadata.tables['mymappedclass'].columns
from sqla-wrapper.
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from sqla-wrapper.