Release: 1.2.18 legacy version | Release Date: February 15, 2019

SQLAlchemy 1.2 Documentation

Contents | Index

Source code for examples.dogpile_caching.fixture_data

"""Installs some sample data.   Here we have a handful of postal codes for
a few US/Canadian cities.   Then, 100 Person records are installed, each
with a randomly selected postal code.

"""
import random

from .environment import Base
from .environment import Session
from .model import Address
from .model import City
from .model import Country
from .model import Person
from .model import PostalCode


def install():
    Base.metadata.create_all(Session().bind)

    data = [
        ("Chicago", "United States", ("60601", "60602", "60603", "60604")),
        ("Montreal", "Canada", ("H2S 3K9", "H2B 1V4", "H7G 2T8")),
        ("Edmonton", "Canada", ("T5J 1R9", "T5J 1Z4", "T5H 1P6")),
        (
            "New York",
            "United States",
            ("10001", "10002", "10003", "10004", "10005", "10006"),
        ),
        (
            "San Francisco",
            "United States",
            ("94102", "94103", "94104", "94105", "94107", "94108"),
        ),
    ]

    countries = {}
    all_post_codes = []
    for city, country, postcodes in data:
        try:
            country = countries[country]
        except KeyError:
            countries[country] = country = Country(country)

        city = City(city, country)
        pc = [PostalCode(code, city) for code in postcodes]
        Session.add_all(pc)
        all_post_codes.extend(pc)

    for i in range(1, 51):
        person = Person(
            "person %.2d" % i,
            Address(
                street="street %.2d" % i,
                postal_code=all_post_codes[
                    random.randint(0, len(all_post_codes) - 1)
                ],
            ),
        )
        Session.add(person)

    Session.commit()

    # start the demo fresh
    Session.remove()