From d696fe885f14719d718e7c379151da0fa5caf423 Mon Sep 17 00:00:00 2001
From: Yohan Boniface <yohanboniface@free.fr>
Date: Mon, 22 Jan 2024 11:09:30 +0100
Subject: [PATCH] fix: do not ask more classes than available values in
 choropleth

It actually does not make sense, and it's a sanity check: some
computation algorithms fail in this situation.
---
 umap/static/umap/js/umap.layer.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/umap/static/umap/js/umap.layer.js b/umap/static/umap/js/umap.layer.js
index 49edb3c4..ddb467e0 100644
--- a/umap/static/umap/js/umap.layer.js
+++ b/umap/static/umap/js/umap.layer.js
@@ -194,6 +194,7 @@ L.U.Layer.Choropleth = L.FeatureGroup.extend({
     let mode = this.datalayer.options.choropleth.mode,
       classes = +this.datalayer.options.choropleth.classes || 5,
       breaks
+    classes = Math.min(classes, values.length)
     if (mode === 'manual') {
       const manualBreaks = this.datalayer.options.choropleth.breaks
       if (manualBreaks) {