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many to many flask-sqlalchemy

Calm Cassowary answered on February 29, 2020 Popularity 9/10 Helpfulness 2/10

answer many to many flask-sqlalchemy

related many to many flask-sqlalchemy

many to many flask-sqlalchemy

Comment

student_identifier = db.Table('student_identifier',
    db.Column('class_id', db.Integer, db.ForeignKey('classes.class_id')),
    db.Column('user_id', db.Integer, db.ForeignKey('students.user_id'))
)

class Student(db.Model):
    __tablename__ = 'students'
    user_id = db.Column(db.Integer, primary_key=True)
    user_fistName = db.Column(db.String(64))
    user_lastName = db.Column(db.String(64))
    user_email = db.Column(db.String(128), unique=True)


class Class(db.Model):
    __tablename__ = 'classes'
    class_id = db.Column(db.Integer, primary_key=True)
    class_name = db.Column(db.String(128), unique=True)
    students = db.relationship("Student",
                               secondary=student_identifier)

s = Student()
c = Class()
c.students.append(s)
db.session.add(c)
db.session.commit()

Popularity 9/10 Helpfulness 2/10 Language sql

Source: stackoverflow.com

Tags: flask-sqlalchemy many-to-many sql

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Contributed on Feb 29 2020

Calm Cassowary

0 Answers Avg Quality 2/10

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many to many flask-sqlalchemy

Comment

association_table = db.Table('association', db.Model.metadata,
    db.Column('left_id', db.Integer, db.ForeignKey('left.id')),
    db.Column('right_id', db.Integer, db.ForeignKey('right.id'))
)

class Parent(db.Model):
    __tablename__ = 'left'
    id = db.Column(db.Integer, primary_key=True)
    children = db.relationship("Child",
                    secondary=association_table)

class Child(db.Model):
    __tablename__ = 'right'
    id = db.Column(db.Integer, primary_key=True)


p = Parent()
c = Child()
p.children.append(c)
db.session.add(p)
db.session.commit()

Popularity 10/10 Helpfulness 2/10 Language sql

Source: stackoverflow.com

Tags: flask-sqlalchemy flas

Link to this answer
Share Copy Link

Contributed on Feb 29 2020

Calm Cassowary

0 Answers Avg Quality 2/10

many to many flask-sqlalchemy

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