问题描述
这是该问题的MWE:
from sqlalchemy import Column,ForeignKey
from sqlalchemy import INTEGER
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship
from marshmallow_sqlalchemy import sqlAlchemyAutoSchema
Base = declarative_base()
class TableA(Base):
__tablename__ = "TableA"
id = Column(INTEGER,primary_key=True)
other_id = Column(INTEGER,ForeignKey("TableB.id"),nullable=False)
tableb = relationship("TableB")
class TableB(Base):
__tablename__ = "TableB"
id = Column(INTEGER,primary_key=True)
tablea = relationship("TableA")
class BaseSchema(sqlAlchemyAutoSchema):
class Meta:
include_relationships = True
load_instance = True
include_fk = True
transient = True
class TableASchema(BaseSchema):
class Meta(BaseSchema.Meta):
model = TableA
class TableBSchema(BaseSchema):
class Meta(BaseSchema.Meta):
model = TableB
b = TableBSchema().load({})
a = TableASchema().load({"tableb": b,"other_id": b.id})
哪个会导致:
ValidationError: {'other_id': ['Field may not be null.']}
如何在提交/刷新之前实例化这种外键关系?我需要做成千上万次,因此每次冲洗都将永远花费。
解决方法
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