Fixed render_bundle tag when the stats file does not exists

tests/app/tests/test_webpack.py

@@ -15,6 +15,7 @@
     WebpackLoaderBadStatsError
 )
 from webpack_loader.utils import get_loader
+from webpack_loader.templatetags.webpack_loader import render_bundle
 
 
 BUNDLE_PATH = os.path.join(settings.BASE_DIR, 'assets/bundles/')
@@ -166,6 +167,20 @@ def test_missing_stats_file(self):
             ).format(stats_file)
             self.assertIn(expected, str(e))
 
+    def test_missin_stats_file_template_tag_render_bundle(self):
+        stats_file = settings.WEBPACK_LOADER[DEFAULT_CONFIG]['STATS_FILE']
+        if os.path.exists(stats_file):
+            os.remove(stats_file)
+        expected = '<script>console.error("{} - {}");</script>'.format(
+            'main',
+            'Error reading {0}. Are you sure webpack has generated the '
+            'file and the path is correct?'.format(stats_file)
+        )
+        self.assertEquals(
+            render_bundle('main'),
+            expected
+        )
+
     def test_bad_status_in_production(self):
         with open(
             settings.WEBPACK_LOADER[DEFAULT_CONFIG]['STATS_FILE'], 'w'

webpack_loader/templatetags/webpack_loader.py

@@ -37,7 +37,13 @@ def _get_bundle(bundle_name, extension, config):
 
 @register.simple_tag
 def render_bundle(bundle_name, extension=None, config='DEFAULT'):
-    return render_as_tags(_get_bundle(bundle_name, extension, config))
+    try:
+        return render_as_tags(_get_bundle(bundle_name, extension, config))
+    except IOError as e:
+        return '<script>console.error("{} - {}");</script>'.format(
+            bundle_name,
+            e
+        )
 
 
 @register.simple_tag