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Tweak database upgrade code style

This commit is contained in:
Andrew Ferrazzutti 2021-06-30 03:06:58 -04:00
parent 1fddc563e2
commit 914d77a24b
1 changed files with 12 additions and 10 deletions
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22
matrix_puppeteer_line/db/upgrade.py
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@ -72,20 +72,22 @@ async def upgrade_media(conn: Connection) -> None:
@upgrade_table.register(description="Helpful table constraints")
async def upgrade_table_constraints(conn: Connection) -> None:
constraint_name = "portal_mxid_key"
table_name = "portal"
constraint_name = f"{table_name}_mxid_key"
q = ( "SELECT EXISTS(SELECT FROM information_schema.constraint_table_usage "
f"WHERE table_name='portal' AND constraint_name='{constraint_name}')")
has_unique_mxid = await conn.fetchval(q)
if not has_unique_mxid:
await conn.execute(f"ALTER TABLE portal ADD CONSTRAINT {constraint_name} UNIQUE(mxid)")
f"WHERE table_name='{table_name}' AND constraint_name='{constraint_name}')")
has_constraint = await conn.fetchval(q)
if not has_constraint:
await conn.execute(f"ALTER TABLE {table_name} ADD CONSTRAINT {constraint_name} UNIQUE(mxid)")
constraint_name = "message_chat_id_fkey"
table_name = "message"
constraint_name = f"{table_name}_chat_id_fkey"
q = ( "SELECT EXISTS(SELECT FROM information_schema.table_constraints "
f"WHERE table_name='message' AND constraint_name='{constraint_name}')")
has_fkey = await conn.fetchval(q)
if not has_fkey:
f"WHERE table_name='{table_name}' AND constraint_name='{constraint_name}')")
has_constraint = await conn.fetchval(q)
if not has_constraint:
await conn.execute(
f"ALTER TABLE message ADD CONSTRAINT {constraint_name} "
f"ALTER TABLE {table_name} ADD CONSTRAINT {constraint_name} "
"FOREIGN KEY (chat_id) "
"REFERENCES portal (chat_id) "
"ON DELETE CASCADE")