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sqlalchemy one to many

Arie de Beuker answered on February 20, 2020 Popularity 10/10 Helpfulness 4/10

answer sqlalchemy one to many

related many to many sqlalchemy

sqlalchemy one to many

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class Parent(Base):
    __tablename__ = 'parent'
    id = Column(Integer, primary_key=True)
    children = relationship("Child", back_populates="parent")

class Child(Base):
    __tablename__ = 'child'
    id = Column(Integer, primary_key=True)
    parent_id = Column(Integer, ForeignKey('parent.id'))
    parent = relationship("Parent", back_populates="children")

Popularity 10/10 Helpfulness 4/10 Language python

Source: docs.sqlalchemy.org

Tags: one-to-many python sqlalchemy

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Contributed on Feb 20 2020

Arie de Beuker

0 Answers Avg Quality 2/10

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many to many sqlalchemy

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

class Parent(Base):
    __tablename__ = 'left'
    id = Column(Integer, primary_key=True)
    children = relationship(
        "Child",
        secondary=association_table,
        back_populates="parents")

class Child(Base):
    __tablename__ = 'right'
    id = Column(Integer, primary_key=True)
    parents = relationship(
        "Parent",
        secondary=association_table,
        back_populates="children")

Popularity 10/10 Helpfulness 4/10 Language sql

Source: docs.sqlalchemy.org

Tags: many-to-many many-to-ma

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Contributed on Jun 09 2020

Embarrassed Eagle

0 Answers Avg Quality 2/10

sqlalchemy one to many

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