haldis/app/migrations/versions/9159a6fed021_initial_haldis_support.py

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"""Initial HLDS support
Revision ID: 9159a6fed021
Revises: 150252c1cdb1
Create Date: 2020-01-26 16:22:00.935963
"""
# pylint: disable=invalid-name
# revision identifiers, used by Alembic.
revision = "9159a6fed021"
down_revision = "150252c1cdb1"
from itertools import chain
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import sqlalchemy as sa
from alembic import op
from hlds.definitions import location_definitions
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from sqlalchemy.sql import column, table, text
LOCATION_LEGACY_TO_HLDS = {
2: "blauw_kotje",
3: "ocean_garden",
4: "delhaize",
5: "simpizza",
6: "shell_tankstation",
7: "pitta_pinte",
8: "lan_pizza",
9: "oriental",
10: "gouden_sate",
11: "quick",
12: "dominos",
13: "stella_di_mare",
14: "olifantje",
15: "pauls_boutique",
16: "fritoloog",
17: "andromeda",
19: "pita_cece",
20: "pita_uniq",
21: "basic_italian",
22: "pizza_hut",
23: "test",
25: "primadonna_takeaway",
26: "primadonna_delivery",
28: "s5",
29: "fitchen",
30: "kebab_anadolu",
}
def upgrade():
# First the simple actions
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op.create_table(
"order_item_choice",
sa.Column("id", sa.Integer, nullable=False),
sa.Column("choice_id", sa.String(length=64), nullable=True),
sa.Column("order_item_id", sa.Integer, nullable=False),
sa.Column("kind", sa.String(length=1), nullable=False),
sa.Column("name", sa.String(length=120), nullable=True),
sa.Column("value", sa.String(length=120), nullable=True),
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sa.ForeignKeyConstraint(
["order_item_id"],
["order_item.id"],
),
sa.PrimaryKeyConstraint("id"),
)
op.add_column(
"order_item",
sa.Column("hlds_data_version", sa.String(length=40), nullable=True),
)
op.alter_column(
"order", "courrier_id", new_column_name="courier_id", type_=sa.Integer
)
op.alter_column(
"order_item",
"extra",
new_column_name="comment",
existing_type=sa.String(254),
type_=sa.Text,
)
op.alter_column(
"order_item", "name", new_column_name="user_name", type_=sa.String(120)
)
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# ----------------------------------------------------------------------------------------------
# Migrate historical product data to order items
# First create the new columns we will populate
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op.add_column(
"order_item", sa.Column("dish_id", sa.String(length=64), nullable=True)
)
op.add_column(
"order_item", sa.Column("dish_name", sa.String(length=120), nullable=True)
)
op.add_column("order_item", sa.Column("price", sa.Integer(), nullable=True))
# Brief, ad-hoc table constructs just for our UPDATE statement, see
# https://alembic.sqlalchemy.org/en/latest/ops.html#alembic.operations.Operations.execute
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order_item = table(
"order_item",
column("product_id", sa.Integer),
column("dish_id", sa.String),
column("dish_name", sa.String),
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column("price", sa.Integer),
)
# Construct and execute queries
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op.execute(
text(
"""
UPDATE order_item
SET dish_name = (SELECT product.name FROM product WHERE product.id = order_item.product_id),
price = (SELECT product.price FROM product WHERE product.id = order_item.product_id)"""
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)
)
# Historical product data migrated, drop obsolete column and table
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op.execute(text("ALTER TABLE order_item DROP FOREIGN KEY order_item_ibfk_3"))
op.drop_column("order_item", "product_id")
op.drop_table("product")
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# ----------------------------------------------------------------------------------------------
# Migrate historical location data to orders
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op.execute(text("ALTER TABLE `order` DROP FOREIGN KEY order_ibfk_2"))
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op.alter_column(
"order",
"location_id",
new_column_name="legacy_location_id",
type_=sa.Integer,
nullable=True,
)
op.add_column(
"order", sa.Column("location_id", sa.String(length=64), nullable=True)
)
op.add_column(
"order", sa.Column("location_name", sa.String(length=128), nullable=True)
)
# Brief, ad-hoc table constructs just for our UPDATE statement, see
# https://alembic.sqlalchemy.org/en/latest/ops.html#alembic.operations.Operations.execute
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order = table(
"order",
column("legacy_location_id", sa.Integer),
column("location_id", sa.String),
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column("location_name", sa.String),
)
# Construct and execute queries
new_location_id = [
order.update()
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.where(order.c.legacy_location_id == old_id)
.values(location_id=new_id)
for old_id, new_id in LOCATION_LEGACY_TO_HLDS.items()
]
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location_name_from_location = text(
"""
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UPDATE `order`
SET location_name = (SELECT location.name FROM location
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WHERE location.id = `order`.legacy_location_id)"""
)
for query in chain(new_location_id, [location_name_from_location]):
op.execute(query)
# Historical location data migrated, drop obsolete column and table
op.drop_column("order", "legacy_location_id")
op.drop_table("location")
def downgrade():
raise NotImplementedError("Downgrading to before HLDS is not supported")