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fix(backtest): handle Databento errors gracefully during page load

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- Set default dates to 2024-07-01 to 2024-12-31 (valid for XNAS.BASIC)
- Catch all exceptions during entry spot derivation, not just ValueError
- Don't auto-run backtest on page load - let user configure first
- Use recent GLD price (~30) as fallback
This commit is contained in:
Bu5hm4nn
2026-03-30 14:48:08 +02:00
parent 79980c33ec
commit b161c51109
1 changed files with 12 additions and 11 deletions
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23
app/pages/backtests.py
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@@ -254,24 +254,25 @@ def _render_backtests_page(workspace_id: str | None = None) -> None:
default_data_source = "databento" default_data_source = "databento"
default_dataset = "XNAS.BASIC" default_dataset = "XNAS.BASIC"
default_schema = "ohlcv-1d" default_schema = "ohlcv-1d"
default_start_date = DEFAULT_BACKTEST_START # Use a start date that's valid for the default dataset (XNAS.BASIC starts 2024-07-01)
default_end_date = DEFAULT_BACKTEST_END default_start_date = date(2024, 7, 1).isoformat()
default_end_date = date(2024, 12, 31).isoformat()
default_symbol = "GLD" default_symbol = "GLD"
default_start_price = 0.0 default_start_price = 0.0
# Derive entry spot from default date range # Derive entry spot from default date range
# Fall back to a reasonable default if fixture source doesn't support the date range # Fall back to a reasonable default if data source doesn't support the date range
try: try:
default_entry_spot = service.derive_entry_spot( default_entry_spot = service.derive_entry_spot(
"GLD", "GLD",
date.fromisoformat(DEFAULT_BACKTEST_START), date.fromisoformat(default_start_date),
date.fromisoformat(DEFAULT_BACKTEST_END), date.fromisoformat(default_end_date),
data_source="databento", # Use databento for default dates data_source="databento",
) )
except ValueError: except Exception:
# Fixture source may not support the default date range # Data source may not support the default date range or API error
# Fall back to a reasonable GLD price # Fall back to a reasonable GLD price (recent ~$230/oz)
default_entry_spot = 185.0 default_entry_spot = 230.0
default_units = ( default_units = (
asset_quantity_from_workspace_config(config, entry_spot=default_entry_spot, symbol="GLD") asset_quantity_from_workspace_config(config, entry_spot=default_entry_spot, symbol="GLD")
if config is not None and default_entry_spot > 0 if config is not None and default_entry_spot > 0
@@ -937,4 +938,4 @@ def _render_backtests_page(workspace_id: str | None = None) -> None:
# Initial render # Initial render
render_seeded_summary(entry_spot=float(default_start_price) if default_start_price > 0 else None) render_seeded_summary(entry_spot=float(default_start_price) if default_start_price > 0 else None)
run_backtest() # Don't auto-run backtest on page load - let user configure and click Run