Properly serialize decimals to ensure lat/lng accuracy (Fixes #185)

mapbox · May 31, 2021 · b5a2c60 · b5a2c60
1 parent be12374
commit b5a2c60
Showing 1 changed file with 9 additions and 1 deletion.
diff --git a/mapboxgl/viz.py b/mapboxgl/viz.py
@@ -1,4 +1,5 @@
 import codecs
+import decimal
 import json
 import os
 
@@ -15,6 +16,13 @@
 GL_JS_VERSION = 'v1.5.0'
 
 
+class FullJSONEncoder(json.JSONEncoder):
+    def default(self, o):
+        if isinstance(o, decimal.Decimal):
+            return str(o)
+        return super().default(o)
+
+
 class VectorMixin(object):
 
     def generate_vector_color_map(self):
@@ -278,7 +286,7 @@ def create_html(self, filename=None):
             style=style,
             center=list(self.center),
             zoom=self.zoom,
-            geojson_data=json.dumps(self.data, ensure_ascii=False),
+            geojson_data=json.dumps(self.data, ensure_ascii=False, cls=FullJSONEncoder),
             belowLayer=self.below_layer,
             opacity=self.opacity,
             minzoom=self.min_zoom,