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Add ORM models for the pixel grids

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- add Grid, Pixel, and AddressPixelAssociation ORM models
- each Grid belongs to a City an is characterized by the side_length
  of all the square Pixels contained in it
- Pixels aggregate Addresses => many-to-many relationship (that is
  modeled with SQLAlchemy's Association Pattern to implement a couple
  of constraints)
This commit is contained in:
Alexander Hess 2021-01-03 19:33:36 +01:00
commit f996376b13
Signed by: alexander
GPG key ID: 344EA5AB10D868E0
15 changed files with 665 additions and 36 deletions
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21
src/urban_meal_delivery/db/__init__.py
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@ -1,11 +1,14 @@
"""Provide the ORM models and a connection to the database."""
from urban_meal_delivery.db.addresses import Address # noqa:F401
from urban_meal_delivery.db.cities import City # noqa:F401
from urban_meal_delivery.db.connection import make_engine # noqa:F401
from urban_meal_delivery.db.connection import make_session_factory # noqa:F401
from urban_meal_delivery.db.couriers import Courier # noqa:F401
from urban_meal_delivery.db.customers import Customer # noqa:F401
from urban_meal_delivery.db.meta import Base # noqa:F401
from urban_meal_delivery.db.orders import Order # noqa:F401
from urban_meal_delivery.db.restaurants import Restaurant # noqa:F401
from urban_meal_delivery.db.addresses import Address
from urban_meal_delivery.db.addresses_pixels import AddressPixelAssociation
from urban_meal_delivery.db.cities import City
from urban_meal_delivery.db.connection import make_engine
from urban_meal_delivery.db.connection import make_session_factory
from urban_meal_delivery.db.couriers import Courier
from urban_meal_delivery.db.customers import Customer
from urban_meal_delivery.db.grids import Grid
from urban_meal_delivery.db.meta import Base
from urban_meal_delivery.db.orders import Order
from urban_meal_delivery.db.pixels import Pixel
from urban_meal_delivery.db.restaurants import Restaurant