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Explicitly decode tick sizes as decimal for symbol loading in `Flume`

pre_overruns_ctxcancelled
Tyler Goodlet 2023-03-20 21:25:42 -04:00
parent 068f5d8eab
commit 8891da2ff3
1 changed files with 12 additions and 0 deletions
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12
piker/data/flows.py
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@ -22,6 +22,7 @@ real-time data processing data-structures.
""" """
from __future__ import annotations from __future__ import annotations
from decimal import Decimal
from typing import ( from typing import (
TYPE_CHECKING, TYPE_CHECKING,
) )
@ -172,7 +173,11 @@ class Flume(Struct):
# TODO: get native msgspec decoding for these workinn # TODO: get native msgspec decoding for these workinn
def to_msg(self) -> dict: def to_msg(self) -> dict:
msg = self.to_dict() msg = self.to_dict()
# TODO: do we even need to convert to dict
# first now?
msg['symbol'] = msg['symbol'].to_dict() msg['symbol'] = msg['symbol'].to_dict()
# can't serialize the stream or feed objects, it's expected # can't serialize the stream or feed objects, it's expected
@ -184,7 +189,14 @@ class Flume(Struct):
@classmethod @classmethod
def from_msg(cls, msg: dict) -> dict: def from_msg(cls, msg: dict) -> dict:
# XXX NOTE: ``msgspec`` can encode `Decimal`
# but it doesn't decide to it by default since
# we aren't spec-cing these msgs as structs...
symbol = Symbol(**msg.pop('symbol')) symbol = Symbol(**msg.pop('symbol'))
symbol.tick_size = Decimal(symbol.tick_size)
symbol.lot_tick_size = Decimal(symbol.lot_tick_size)
return cls( return cls(
symbol=symbol, symbol=symbol,
**msg, **msg,