我正在尝试查询具有以下架构的多对多关系
private func stopEngine()
{
self.engine.inputNode.removeTap(onBus: 0)
self.engine.stop()
}
我正在使用以下查询来获取参与者和父母的详细信息，但是我不清楚如何在父母结果集中显示/检索class ParentModel(db.Model):
__tablename__ = 'parents'
id = db.Column(UUID(as_uuid=True), primary_key=True, default=uuid4)
first_name = db.Column(db.String(30))
last_name = db.Column(db.String(30))
phone_no = db.Column(db.String(12))
children = db.relationship('ParticipantModel', secondary='participant_parent')
class ParticipantModel(db.Model):
__tablename__ = 'participants'
id = db.Column(UUID(as_uuid=True), primary_key=True, default=uuid4)
subject_id = db.Column(db.Integer)
first_name = db.Column(db.String(30))
last_name = db.Column(db.String(30))
parents = db.relationship(ParentModel, secondary='participant_parent')
class ParticipantParentModel(db.Model):
__tablename__ = 'participant_parent'
id = db.Column(UUID(as_uuid=True), primary_key=True, default=uuid4)
relationship = db.Column(db.String(20)) # I want this value along with parents dataset
participant_id = db.Column(UUID(as_uuid=True), db.ForeignKey('participants.id'), primary_key=True)
parent_id = db.Column(UUID(as_uuid=True), db.ForeignKey('parents.id'), primary_key=True)
parents = db.relationship(ParentModel, backref=db.backref('parent_assoc'))
participant = db.relationship(ParticipantModel, backref=db.backref('participant_assoc'))
class ParentSchema(ma.SQLAlchemyAutoSchema):
class Meta:
model = ParentModel
include_fk = True
class ParticipantSchema(ma.SQLAlchemyAutoSchema):
class Meta:
model = ParticipantModel
include_fk = True
parents = ma.Nested(ParentSchema, many=True)
值。
ParticipantParentModel.relationship
participant_p1 = ParticipantModel.query.filter_by(first_name='p1').first()对我是否需要更改架构或方法的任何建议表示赞赏。