From 0ce2590568db3b31ed79d4e6b56353574db5347b Mon Sep 17 00:00:00 2001
From: Sandwich <sandwich@archworks.co>
Date: Mon, 5 Oct 2026 19:25:02 +0200
Subject: [PATCH] fix(validation): accept an empty string as the unset value of
 an int

---
 plugins/action/validate_inputs.py | 5 +++--
 tests/inputs/inputs_fixtures.yml  | 6 ++++++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/plugins/action/validate_inputs.py b/plugins/action/validate_inputs.py
index d39ab25..20457e0 100644
--- a/plugins/action/validate_inputs.py
+++ b/plugins/action/validate_inputs.py
@@ -20,10 +20,11 @@ SPEC_KEYS = {"type", "required", "default", "choices", "elements", "options", "d
 UNRESOLVED = object()
 
 # Numbers pass where a string is declared and digit strings where an int is: the roles read those
-# through `| string` and `| int` unchanged. A string posing as a list, bool or dict never passes.
+# through `| string` and `| int` unchanged. An empty string is the contract's unset int, as in
+# `system.vlan: ""`. A string posing as a list, bool or dict never passes.
 TYPES = {
     "str": lambda v: isinstance(v, (str, int, float, EncryptedString)) and not isinstance(v, bool),
-    "int": lambda v: (isinstance(v, int) and not isinstance(v, bool)) or (isinstance(v, str) and v.isdigit()),
+    "int": lambda v: (isinstance(v, int) and not isinstance(v, bool)) or (isinstance(v, str) and (v == "" or v.isdigit())),
     "float": lambda v: isinstance(v, (int, float)) and not isinstance(v, bool),
     "bool": lambda v: isinstance(v, bool),
     "list": lambda v: isinstance(v, list),
diff --git a/tests/inputs/inputs_fixtures.yml b/tests/inputs/inputs_fixtures.yml
index eabc8e7..14f7fba 100644
--- a/tests/inputs/inputs_fixtures.yml
+++ b/tests/inputs/inputs_fixtures.yml
@@ -16,6 +16,12 @@ inputs_fixtures:
         retired: ~
     expect: []
 
+  - name: empty-int-is-unset
+    value:
+      name: web01
+      count: ""
+    expect: []
+
   - name: list-for-dict
     value:
       name: web01