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Migrations for indexes should run in a seperate session

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closes #5349
pull/5351/head
Matthias 5 years ago
parent 1ccc89d1e9
commit c5e3348b89
3 changed files with 8 additions and 102 deletions
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2
docs/sql_cheatsheet.md
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@ -110,7 +110,7 @@ DELETE FROM trades WHERE id = 31;
Freqtrade supports PostgreSQL by using SQLAlchemy, which supports multiple different database systems.
Installation:
`pip install psycopg2`
`pip install psycopg2-binary`
Usage:
`... --db-url postgresql+psycopg2://<username>:<password>@localhost:5432/<database>`

18
freqtrade/persistence/migrations.py
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@ -65,7 +65,8 @@ def migrate_trades_table(decl_base, inspector, engine, table_back_name: str, col
# Schema migration necessary
with engine.begin() as connection:
connection.execute(text(f"alter table trades rename to {table_back_name}"))
# drop indexes on backup table
with engine.begin() as connection:
# drop indexes on backup table in new session
for index in inspector.get_indexes(table_back_name):
connection.execute(text(f"drop index {index['name']}"))
# let SQLAlchemy create the schema as required
@ -76,7 +77,7 @@ def migrate_trades_table(decl_base, inspector, engine, table_back_name: str, col
connection.execute(text(f"""insert into trades
(id, exchange, pair, is_open,
fee_open, fee_open_cost, fee_open_currency,
fee_close, fee_close_cost, fee_open_currency, open_rate,
fee_close, fee_close_cost, fee_close_currency, open_rate,
open_rate_requested, close_rate, close_rate_requested, close_profit,
stake_amount, amount, amount_requested, open_date, close_date, open_order_id,
stop_loss, stop_loss_pct, initial_stop_loss, initial_stop_loss_pct,
@ -84,14 +85,7 @@ def migrate_trades_table(decl_base, inspector, engine, table_back_name: str, col
max_rate, min_rate, sell_reason, sell_order_status, strategy, buy_tag,
timeframe, open_trade_value, close_profit_abs
)
select id, lower(exchange),
case
when instr(pair, '_') != 0 then
substr(pair, instr(pair, '_') + 1) || '/' ||
substr(pair, 1, instr(pair, '_') - 1)
else pair
end
pair,
select id, lower(exchange), pair,
is_open, {fee_open} fee_open, {fee_open_cost} fee_open_cost,
{fee_open_currency} fee_open_currency, {fee_close} fee_close,
{fee_close_cost} fee_close_cost, {fee_close_currency} fee_close_currency,
@ -132,7 +126,9 @@ def migrate_orders_table(decl_base, inspector, engine, table_back_name: str, col
with engine.begin() as connection:
connection.execute(text(f"alter table orders rename to {table_back_name}"))
# drop indexes on backup table
with engine.begin() as connection:
# drop indexes on backup table in new session
for index in inspector.get_indexes(table_back_name):
connection.execute(text(f"drop index {index['name']}"))

90
tests/test_persistence.py
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@ -442,96 +442,6 @@ def test_clean_dry_run_db(default_conf, fee):
assert len(Trade.query.filter(Trade.open_order_id.isnot(None)).all()) == 1
def test_migrate_old(mocker, default_conf, fee):
"""
Test Database migration(starting with old pairformat)
"""
amount = 103.223
create_table_old = """CREATE TABLE IF NOT EXISTS "trades" (
id INTEGER NOT NULL,
exchange VARCHAR NOT NULL,
pair VARCHAR NOT NULL,
is_open BOOLEAN NOT NULL,
fee FLOAT NOT NULL,
open_rate FLOAT,
close_rate FLOAT,
close_profit FLOAT,
stake_amount FLOAT NOT NULL,
amount FLOAT,
open_date DATETIME NOT NULL,
close_date DATETIME,
open_order_id VARCHAR,
PRIMARY KEY (id),
CHECK (is_open IN (0, 1))
);"""
insert_table_old = """INSERT INTO trades (exchange, pair, is_open, open_order_id, fee,
open_rate, stake_amount, amount, open_date)
VALUES ('binance', 'BTC_ETC', 1, '123123', {fee},
0.00258580, {stake}, {amount},
'2017-11-28 12:44:24.000000')
""".format(fee=fee.return_value,
stake=default_conf.get("stake_amount"),
amount=amount
)
insert_table_old2 = """INSERT INTO trades (exchange, pair, is_open, fee,
open_rate, close_rate, stake_amount, amount, open_date)
VALUES ('binance', 'BTC_ETC', 0, {fee},
0.00258580, 0.00268580, {stake}, {amount},
'2017-11-28 12:44:24.000000')
""".format(fee=fee.return_value,
stake=default_conf.get("stake_amount"),
amount=amount
)
engine = create_engine('sqlite://')
mocker.patch('freqtrade.persistence.models.create_engine', lambda *args, **kwargs: engine)
# Create table using the old format
with engine.begin() as connection:
connection.execute(text(create_table_old))
connection.execute(text(insert_table_old))
connection.execute(text(insert_table_old2))
# Run init to test migration
init_db(default_conf['db_url'], default_conf['dry_run'])
assert len(Trade.query.filter(Trade.id == 1).all()) == 1
trade = Trade.query.filter(Trade.id == 1).first()
assert trade.fee_open == fee.return_value
assert trade.fee_close == fee.return_value
assert trade.open_rate_requested is None
assert trade.close_rate_requested is None
assert trade.is_open == 1
assert trade.amount == amount
assert trade.amount_requested == amount
assert trade.stake_amount == default_conf.get("stake_amount")
assert trade.pair == "ETC/BTC"
assert trade.exchange == "binance"
assert trade.max_rate == 0.0
assert trade.stop_loss == 0.0
assert trade.initial_stop_loss == 0.0
assert trade.open_trade_value == trade._calc_open_trade_value()
assert trade.close_profit_abs is None
assert trade.fee_open_cost is None
assert trade.fee_open_currency is None
assert trade.fee_close_cost is None
assert trade.fee_close_currency is None
assert trade.timeframe is None
trade = Trade.query.filter(Trade.id == 2).first()
assert trade.close_rate is not None
assert trade.is_open == 0
assert trade.open_rate_requested is None
assert trade.close_rate_requested is None
assert trade.close_rate is not None
assert pytest.approx(trade.close_profit_abs) == trade.calc_profit()
assert trade.sell_order_status is None
# Should've created one order
assert len(Order.query.all()) == 1
order = Order.query.first()
assert order.order_id == '123123'
assert order.ft_order_side == 'buy'
def test_migrate_new(mocker, default_conf, fee, caplog):
"""
Test Database migration (starting with new pairformat)

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