From a78c7f146142949a91a7de024bbe7ac71ee2e8b2 Mon Sep 17 00:00:00 2001
From: James Batchelor <james.batchelor@jtdms.co.uk>
Date: Mon, 20 Jan 2025 15:31:47 +0000
Subject: [PATCH] fix: use internally tagged serde sttribute for IndexMetric
 enum

---
 pywr-schema/src/metric.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pywr-schema/src/metric.rs b/pywr-schema/src/metric.rs
index 4fc60b0..15dbef9 100644
--- a/pywr-schema/src/metric.rs
+++ b/pywr-schema/src/metric.rs
@@ -472,7 +472,7 @@ impl EdgeReference {
 /// This struct is the integer equivalent of [`Metric`] and is used in places where an integer
 /// value is required. See [`Metric`] for more information.
 #[derive(serde::Deserialize, serde::Serialize, Debug, Clone, JsonSchema, Display, PartialEq)]
-#[serde(untagged)]
+#[serde(tag = "type")]
 pub enum IndexMetric {
     Constant {
         value: u64,