From 374967dc6fc7271b435948098c657d5d9c6691aa Mon Sep 17 00:00:00 2001
From: Tyler Goodlet <jgbt@protonmail.com>
Date: Sun, 15 Aug 2021 12:30:22 -0400
Subject: [PATCH] Support temp `Symbol` and non-copied model refs on `Order`
 msg

---
 piker/clearing/_messages.py | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/piker/clearing/_messages.py b/piker/clearing/_messages.py
index 7db06c57..126326ab 100644
--- a/piker/clearing/_messages.py
+++ b/piker/clearing/_messages.py
@@ -24,6 +24,8 @@ from typing import Optional, Union
 # import msgspec
 from pydantic import BaseModel
 
+from ..data._source import Symbol
+
 # Client -> emsd
 
 
@@ -42,7 +44,7 @@ class Order(BaseModel):
     action: str  # {'buy', 'sell', 'alert'}
     # internal ``emdsd`` unique "order id"
     oid: str  # uuid4
-    symbol: str
+    symbol: Union[str, Symbol]
 
     price: float
     size: float
@@ -56,6 +58,13 @@ class Order(BaseModel):
     # the backend broker
     exec_mode: str  # {'dark', 'live', 'paper'}
 
+    class Config:
+        # just for pre-loading a ``Symbol`` when used
+        # in the order mode staging process
+        arbitrary_types_allowed = True
+        # don't copy this model instance when used in
+        # a recursive model
+        copy_on_model_validation = False
 
 # Client <- emsd
 # update msgs from ems which relay state change info