add database migrations
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This commit is contained in:
mitsuha_s 2022-08-21 16:03:00 +03:00
parent 90a26dd1c8
commit 8766e36aa6
3 changed files with 28 additions and 21 deletions

View file

@ -4,6 +4,8 @@ from psycopg2.extensions import connection
from psycopg2.extras import DictCursor, DictRow
from exceptions import DisplayableException
from rss import FeedItem
from yoyo import read_migrations
from yoyo import get_backend
class Database:
@ -15,7 +17,7 @@ class Database:
self.log.debug('Database.__init__(DSN=\'%s\')', dsn)
self.conn: connection = psycopg2.connect(dsn)
self.cur: DictCursor = self.conn.cursor(cursor_factory=DictCursor)
self.__init_schema()
self.__migration(dsn)
def add_user(self, telegram_id: int) -> int:
"""Add a user's telegram id to the database and return its database id."""
@ -156,26 +158,12 @@ class Database:
'INSERT INTO feeds_last_items (feed_id, url, guid) VALUES (%s, %s, %s)', new_items)
self.conn.commit()
def __init_schema(self) -> None:
self.log.debug('__init_schema()')
self.cur.execute(
'CREATE TABLE IF NOT EXISTS users (id SERIAL PRIMARY KEY, telegram_id INTEGER NOT NULL UNIQUE)'
)
self.cur.execute('CREATE TABLE IF NOT EXISTS feeds (id SERIAL PRIMARY KEY, url TEXT NOT NULL UNIQUE)')
self.cur.execute(
'CREATE TABLE IF NOT EXISTS subscriptions ('
' user_id INTEGER REFERENCES users,'
' feed_id INTEGER REFERENCES feeds,'
' UNIQUE (user_id, feed_id)'
')'
)
self.cur.execute(
'CREATE TABLE IF NOT EXISTS feeds_last_items ('
' feed_id INTEGER REFERENCES feeds ON DELETE CASCADE,'
' url TEXT NOT NULL,'
' guid TEXT'
')'
)
def __migration(self, dsn: str) -> None:
backend = get_backend(dsn)
migrations = read_migrations('./migrations')
with backend.lock():
backend.apply_migrations(backend.to_apply(migrations))
@staticmethod
def __dictrow_to_dict_list(rows: list[DictRow]) -> list[dict]:

View file

@ -0,0 +1,18 @@
from yoyo import step
steps = [
step('CREATE TABLE IF NOT EXISTS users (id SERIAL PRIMARY KEY, telegram_id INTEGER NOT NULL UNIQUE)'),
step('CREATE TABLE IF NOT EXISTS feeds (id SERIAL PRIMARY KEY, url TEXT NOT NULL UNIQUE)'),
step('CREATE TABLE IF NOT EXISTS subscriptions ('
' user_id INTEGER REFERENCES users,'
' feed_id INTEGER REFERENCES feeds,'
' UNIQUE (user_id, feed_id)'
')'
),
step('CREATE TABLE IF NOT EXISTS feeds_last_items ('
' feed_id INTEGER REFERENCES feeds ON DELETE CASCADE,'
' url TEXT NOT NULL,'
' guid TEXT'
')'
)
]

View file

@ -13,3 +13,4 @@ six==1.16.0
urllib3==1.26.9
validators==0.19.0
webencodings==0.5.1
yoyo-migrations==7.3.2