Created
February 20, 2012 21:11
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SQLAlchemy, dynamic table creation
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def init_i18n_class(cls): | |
"""Create, via metadata reflection, an I18N class object | |
for i18n-enabled tables.""" | |
tablename = cls.__tablename__ + "_i18n" | |
if Base.metadata.tables.get(tablename) is not None: | |
classname = cls.__name__ + "I18N" | |
i18nt = Table(tablename, Base.metadata, | |
Column("id", ForeignKey("%s.id" % cls.__tablename__), primary_key=True), | |
Column("culture", String(25), primary_key=True), | |
ForeignKeyConstraint(["id"], ["%s.id" % cls.__tablename__]), | |
autoload=True, extend_existing=True) | |
globals()[classname] =type(classname, (Base,), dict(__table__=i18nt)) | |
setattr(cls, tablename, relationship(classname, cascade="all,delete-orphan", | |
primaryjoin="%s.id == %s.id" % (classname, cls.__name__))) |
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