From eeb6134287b9fe1866ba9b7a6c18a2d5560b4562 Mon Sep 17 00:00:00 2001
From: Ferran Capallera <fcapallera@gisce.net>
Date: Thu, 1 Oct 2026 14:44:14 +0200
Subject: [PATCH 1/2] fix: avoid raising on empty final_data

---
 ooui/graph/chart.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ooui/graph/chart.py b/ooui/graph/chart.py
index b1a0aa8..8c85172 100644
--- a/ooui/graph/chart.py
+++ b/ooui/graph/chart.py
@@ -185,7 +185,7 @@ def process(self, values, fields, options=None):
         if ((self.type == 'line' and self.y_range)
                 or (self.type == 'bar' and self.y_range == 'slider')):
             y_axis_opts = {'mode': self.y_range}
-            if self.y_range == 'auto':
+            if self.y_range == 'auto' and final_data:
                 y_axis_opts['valueOpts'] = get_min_max(final_data)
             result['yAxisOpts'] = y_axis_opts
 

From 722d19bd29fcb97ddecf95e036ab0a520d381bfb Mon Sep 17 00:00:00 2001
From: GISCE Bot <giscebot@gisce.net>
Date: Thu, 1 Oct 2026 15:20:39 +0200
Subject: [PATCH 2/2] test: cover auto y range without data

Co-authored-by: fcapallera <36483261+fcapallera@users.noreply.github.com>
---
 spec/graph/graph_spec.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/spec/graph/graph_spec.py b/spec/graph/graph_spec.py
index c1c297b..c3c5dcf 100644
--- a/spec/graph/graph_spec.py
+++ b/spec/graph/graph_spec.py
@@ -186,6 +186,20 @@
                         'max': 32
                     }
                 }))
+
+            with it("should return empty data without value limits when there are no values"):
+                xml = """<?xml version="1.0"?>
+                <graph type="line" y_range="auto" timerange="day">
+                  <field name="date" axis="x"/>
+                  <field name="v" operator="+" axis="y"/>
+                </graph>
+                """
+                graph = parse_graph(xml)
+                fields = {'date': {'type': 'date'}, 'v': {'type': 'integer'}}
+                result = graph.process([], fields)
+                expect(result['data']).to(equal([]))
+                expect(result['yAxisOpts']).to(equal({'mode': 'auto'}))
+
         with description("A line graph with y_range to full"):
             with it("should return yAxisOpts to the result with mode full"):
                 xml = """<?xml version="1.0"?>