From be88b32a8e33797dc884fe07c6d8c229ee6e4607 Mon Sep 17 00:00:00 2001
From: Benjamin Dauvergne <bdauvergne@entrouvert.com>
Date: Mon, 13 Jan 2020 11:26:50 +0100
Subject: [PATCH] visualisation: return 0.0 for None measures in json_data
 (#38913)

---
 bijoe/schemas.py             | 8 ++++++++
 bijoe/visualization/utils.py | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/bijoe/schemas.py b/bijoe/schemas.py
index 7adf428..9362408 100644
--- a/bijoe/schemas.py
+++ b/bijoe/schemas.py
@@ -137,6 +137,14 @@ class Measure(Base):
         'expression': str,
     }
 
+    @property
+    def default_value(self):
+        if self.type in ['integer', 'percent']:
+            return 0
+        if self.type == 'duration':
+            return datetime.timedelta(seconds=0)
+        return None
+
 
 class Dimension(Base):
     __slots__ = ['name', 'label', 'type', 'join', 'value', 'value_label',
diff --git a/bijoe/visualization/utils.py b/bijoe/visualization/utils.py
index 034b141..822548d 100644
--- a/bijoe/visualization/utils.py
+++ b/bijoe/visualization/utils.py
@@ -177,7 +177,7 @@ class Visualization(object):
         return data
 
     def default_cell(self):
-        return MeasureCell(measure=self.measure, value=None)
+        return MeasureCell(measure=self.measure, value=self.measure.default_value)
 
     def table_2d(self):
         '''Layout data into 2d tables'''
-- 
2.24.0