From 1b1834d4e6d03c36bb84f095364ff4aab777d0bdcbd9de8d732adb1588a47602 Mon Sep 17 00:00:00 2001
From: PioApocalypse <pioapocalypse@proton.me>
Date: Mon, 16 Feb 2026 15:35:22 +0100
Subject: [PATCH] some attributes don't default to NoneType anymore
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Target.description defaults to "" (empty str)
Substrate.thickness defaults to "" (empty str)
Substrate.thickness_unit is now hardcoded to "μm"
did you know? apparently h5py does NOT like null values
---
 src/classes.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/classes.py b/src/classes.py
index c9eb5c0..b45ae5f 100644
--- a/src/classes.py
+++ b/src/classes.py
@@ -175,7 +175,8 @@ class Substrate(Material):
             self.miscut_angle_unit = self.extra["Miscut Angle"]["unit"]
             self.miscut_direction = self.extra["Miscut Direction"]["value"]
             # Not present (yet) on eLabFTW for Substrates:
-            self.thickness = None #self.extra["Thickness"]["value"]
+            self.thickness = "" #self.extra["Thickness"]["value"]
+            self.thickness_unit = "μm" #self.extra["Thickness"]["unit"]
             self.surface_treatment = self.extra["Surface treatment"]["value"]
             self.manufacturer = self.extra["Supplier"]["value"]
             self.batch_id = self.extra["Batch ID"]["value"]
@@ -194,7 +195,7 @@ class Target(Material):
         except KeyError as k:
             raise KeyError(f"The provided dictionary lacks a \"{k}\" key - which is specific for PLD targets. Check the {self.name} target entry on eLabFTW and make sure you used the correct Resource template.")
         # Non-required attributes:
-        self.description = material_data.get("body") or None
+        self.description = material_data.get("body") or ""