Many to many flask-sqlalchemy

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()

Source: stackoverflow.com

Many to many flask-sqlalchemy

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()

Source: stackoverflow.com

Similar codes

0 vote198 views1 answer
Sql remove first character from string
SQL
2 votes191 views1 answer
Sql like variable
SQL
-1 vote219 views1 answer
Mysql delete duplicate rows except one
SQL
1 vote218 views1 answer
Oracle activate job
SQL
2 votes210 views2 answers
Mysql alter column default
SQL
2 votes183 views1 answer
Mysql list users on ubuntu
SQL
0 vote186 views4 answers
Mysql count table rows
SQL
0 vote201 views1 answer
Sql count * vs count 1
SQL
19 votes200 views6 answers
What is mySQL
SQL
3 votes214 views1 answer
Start mysql server by terminal in linux
SQL