upgrade

Applies database schema migrations by creating the 'user' and 'item' tables, defining their columns, constraints, and indexes using Alembic and SQLAlchemy.

def upgrade() - > null

Applies database schema migrations by creating the 'user' and 'item' tables along with their associated indexes and foreign key constraints.

Returns

Type	Description
null	Nothing is returned; the function performs in-place database schema modifications.