From 0c23387557520140c59b47ba319a6b6fdbf2b245 Mon Sep 17 00:00:00 2001
From: corvince <13568919+Corvince@users.noreply.github.com>
Date: Wed, 13 Nov 2024 20:54:16 +0100
Subject: [PATCH] Only set model_parameters once

---
 mesa/visualization/solara_viz.py | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/mesa/visualization/solara_viz.py b/mesa/visualization/solara_viz.py
index 10718e8a804..1f3c8036888 100644
--- a/mesa/visualization/solara_viz.py
+++ b/mesa/visualization/solara_viz.py
@@ -382,11 +382,17 @@ def ModelCreator(
     )
     user_params, fixed_params = split_model_params(user_params)
 
-    # set model_parameters to the default values for all parameters
-    model_parameters.value = {
-        **fixed_params,
-        **{k: v.get("value") for k, v in user_params.items()},
-    }
+    # Use solara.use_effect to run the initialization code only once
+    solara.use_effect(
+        # set model_parameters to the default values for all parameters
+        lambda: model_parameters.set(
+            {
+                **fixed_params,
+                **{k: v.get("value") for k, v in user_params.items()},
+            }
+        ),
+        [],
+    )
 
     def on_change(name, value):
         model_parameters.value = {**model_parameters.value, name: value}