fix(api): Update NumericRange handling to use half-open intervals

Changes NumericRange boundaries to use half-open intervals
[lower, upper). Updates logic in data utilities, and corresponding tests
to reflect this standard. Ensures consistency across range handling and
validation outputs.

Fixes #20471

Author: pheus

netbox/netbox/api/fields.py

@@ -169,7 +169,7 @@ def to_internal_value(self, data):
         if type(data[0]) is not int or type(data[1]) is not int:
             raise ValidationError(_("Range boundaries must be defined as integers."))
 
-        return NumericRange(data[0], data[1], bounds='[]')
+        return NumericRange(data[0], data[1] + 1, bounds='[)')
 
     def to_representation(self, instance):
         return instance.lower, instance.upper - 1

netbox/utilities/data.py

@@ -152,9 +152,16 @@ def ranges_to_string(ranges):
 
 def string_to_ranges(value):
     """
-    Given a string in the format "1-100, 200-300" return an list of NumericRanges. Intended for use with ArrayField.
-    For example:
-        "1-99,200-299" => [NumericRange(1, 100), NumericRange(200, 300)]
+    Converts a string representation of numeric ranges into a list of NumericRange objects.
+
+    This function parses a string containing numeric values and ranges separated by commas (e.g.,
+    "1-5,8,10-12") and converts it into a list of NumericRange objects.
+    In the case of a single integer, it is treated as a range where the start and end
+    are equal. The returned ranges are represented as half-open intervals [lower, upper).
+    Intended for use with ArrayField.
+
+    Example:
+        "1-5,8,10-12" => [NumericRange(1, 6), NumericRange(8, 9), NumericRange(10, 13)]
     """
     if not value:
         return None
@@ -172,5 +179,5 @@ def string_to_ranges(value):
             upper = dash_range[1]
         else:
             return None
-        values.append(NumericRange(int(lower), int(upper), bounds='[]'))
+        values.append(NumericRange(int(lower), int(upper) + 1, bounds='[)'))
     return values

netbox/utilities/tests/test_data.py

@@ -61,18 +61,18 @@ def test_string_to_ranges(self):
         self.assertEqual(
             string_to_ranges('10-19, 30-39, 100-199'),
             [
-                NumericRange(10, 19, bounds='[]'),    # 10-19
-                NumericRange(30, 39, bounds='[]'),    # 30-39
-                NumericRange(100, 199, bounds='[]'),  # 100-199
+                NumericRange(10, 20, bounds='[)'),    # 10-20
+                NumericRange(30, 40, bounds='[)'),    # 30-40
+                NumericRange(100, 200, bounds='[)'),  # 100-200
             ]
         )
 
         self.assertEqual(
             string_to_ranges('1-2, 5, 10-12'),
             [
-                NumericRange(1, 2, bounds='[]'),    # 1-2
-                NumericRange(5, 5, bounds='[]'),    # 5-5
-                NumericRange(10, 12, bounds='[]'),  # 10-12
+                NumericRange(1, 3, bounds='[)'),    # 1-3
+                NumericRange(5, 6, bounds='[)'),    # 5-6
+                NumericRange(10, 13, bounds='[)'),  # 10-13
             ]
         )