我在数据库中有这样的结构
tasks_exams = db.Table('tasks_exams',
db.Column('task_id', db.Integer, db.ForeignKey('tasks.id')),
db.Column('exam_id', db.Integer, db.ForeignKey('exams.id'))
)
class Tasks(db.Model):
__tablename__ = 'tasks'
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
task = db.Column(db.Text)
class Exams(db.Model):
__tablename__ = 'exams'
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
name_of_Exam = db.Column(db.String(140))
number_of_exam_task = db.Column(db.SmallInteger)
name_of_exams_task = db.Column(db.String(140))
tasks = db.relationship('Tasks',
secondary=tasks_exams,
back_populates="exams")
我想获取 exams_1 所在的所有任务:
tasku = Exams.query.filter(Exams.name_of_Exam == "exams_1").scalar()
我得到一个错误:
sqlalchemy.exc.MultipleResultsFound: Multiple rows were found when exactly one was required
我该如何解决我的问题?
最佳答案
tasku = Tasks.query.filter(Exams.name_of_Exam =="ЕГЭ").all()
关于python - sqlalchemy.exc.MultipleResultsFound : Multiple rows were found when exactly one was required,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/67382183/