Build a CRUD App with SQLAlchemy - db.relationship

db.relationship

Provides and configures a mapped relationship between two models.

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• SQLAlchemy configures the settings between model relationships once, and generates JOIN statements for us whenever we need them.
• db.relationship is an interface offered in SQLAlchemy to provide and configure a mapped relationship between two models.
• db.relationship is defined on the parent model, and it sets:
  • the name of its children (e.g. children), for example parent1.children
  • the name of a parent on a child using the backref, for example child1.my_amazing_parent