fix maps portlet

Author: petschki

src/collective/collectionfilter/baseviews.py

@@ -283,6 +283,19 @@ def ajax_url(self):
             )
             return ajax_url
 
+        @property
+        def geojson_ajax_url(self):
+            # Recursively transform all to unicode
+            request_params = safe_decode(self.top_request.form)
+            urlquery = base_query(
+                request_params, extra_ignores=['latitude', 'longitude'])
+            query_param = urlencode(safe_encode(urlquery), doseq=True)
+            geojson_ajax_url = u'{}/@@geodata.json{}'.format(
+                self.collection.getURL(),
+                '?' + query_param if query_param else '',
+            )
+            return geojson_ajax_url
+
         @property
         def locations(self):
             custom_query = {}  # Additional query to filter the collection

src/collective/collectionfilter/portlets/maps.py

@@ -25,6 +25,7 @@ class Assignment(base.Assignment):
     narrow_down = False
     default_map_layer = default_map_layer
     map_layers = default_map_layers
+    geojson_properties_limit = 500
 
     def __init__(
         self,
@@ -35,6 +36,7 @@ def __init__(
         narrow_down=False,
         default_map_layer=default_map_layer,
         map_layers=default_map_layers,
+        geojson_properties_limit=500,
     ):
         self.header = header
         self.target_collection = target_collection
@@ -43,6 +45,7 @@ def __init__(
         self.narrow_down = narrow_down
         self.default_map_layers = default_map_layers
         self.map_layers = map_layers
+        self.geojson_properties_limit = geojson_properties_limit
 
     @property
     def title(self):