From 9d371e16ae41c1280940e68d204f069c9870a149 Mon Sep 17 00:00:00 2001
From: Pardhav Maradani <66913993+PardhavMaradani@users.noreply.github.com>
Date: Sun, 23 Feb 2025 18:31:17 +0530
Subject: [PATCH] Fixes BradyAJohnston/MolecularNodes#746 (#747)

- Add checks for presence of addon preferences
---
 molecularnodes/entities/molecule/ui.py | 12 ++++++++++--
 molecularnodes/pref.py                 |  8 ++++----
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/molecularnodes/entities/molecule/ui.py b/molecularnodes/entities/molecule/ui.py
index 42f6cb37..8fde2c75 100644
--- a/molecularnodes/entities/molecule/ui.py
+++ b/molecularnodes/entities/molecule/ui.py
@@ -491,7 +491,11 @@ def panel_wwpdb(layout, scene):
     op.style = scene.mn.import_style
     op.centre = scene.mn.import_centre
     op.centre_type = scene.mn.import_centre_type
-    op.cache_dir = str(addon_preferences().cache_dir)
+    prefs = addon_preferences()
+    if prefs is not None:
+        op.cache_dir = str(prefs.cache_dir)
+    else:
+        op.cache_dir = str(bpy.app.tempdir)
     layout.separator(factor=0.4)
 
     layout.separator()
@@ -537,7 +541,11 @@ def panel_alphafold(layout, scene):
     op.style = scene.mn.import_style
     op.centre = scene.mn.import_centre
     op.centre_type = scene.mn.import_centre_type
-    op.cache_dir = str(addon_preferences().cache_dir)
+    prefs = addon_preferences()
+    if prefs is not None:
+        op.cache_dir = str(prefs.cache_dir)
+    else:
+        op.cache_dir = str(bpy.app.tempdir)
 
     layout.separator(factor=0.4)
 
diff --git a/molecularnodes/pref.py b/molecularnodes/pref.py
index 6cec3c1a..51cd2ea2 100644
--- a/molecularnodes/pref.py
+++ b/molecularnodes/pref.py
@@ -14,10 +14,10 @@ def addon_preferences(
     try:
         return context.preferences.addons[__package__].preferences
     except KeyError:
-        return context.preferences.addons[
-            "bl_ext.vscode_development.molecularnodes"
-        ].preferences
-
+        key = "bl_ext.vscode_development.molecularnodes"
+        if key in context.preferences.addons:
+            return context.preferences.addons[key].preferences
+        return None
 
 class MN_OT_Template_Install(bpy.types.Operator):
     bl_idname = "mn.template_install"