fix difference percent period calculation

kevinyankai · Dec 2, 2023 · 79b98d0 · 79b98d0
1 parent 8972f71
commit 79b98d0
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/pyscada/models.py b/pyscada/models.py
@@ -2215,7 +2215,10 @@ def get_value(self, d1, d2):
             elif type_str == "difference":
                 res = values[-1] - values[0]
             elif type_str == "difference percent":
-                res = (values[-1] - values[0]) / min(values)
+                if values[0] == 0:
+                    res = None
+                else:
+                    res = (values[-1] - values[0]) / (values[0] * 100)
             elif type_str == "delta":
                 res = 0
                 v = None