SACGF/variantgrid_com#86 - variantgrid.com crash on new VM - use iter…

…ator

library/jqgrid/jqgrid.py

@@ -84,6 +84,8 @@ class JqGrid:
     colmodel_overrides = {}  # Class member, do not modify in instances!
 
     def __init__(self):
+        # Use for enormous querysets (eg downloads) to reduce RAM usage
+        self.use_iterator_if_no_pagination = False
         self.extra_config = {}
         self._overrides = deepcopy(self.colmodel_overrides)
         if not self.fields:
@@ -306,6 +308,9 @@ def get_paginate_by(self, request):
     def paginate_items(self, request, items):
         paginate_by = self.get_paginate_by(request)
         if not paginate_by:
+            if self.use_iterator_if_no_pagination:
+                items = items.iterator()
+
             return None, None, items
 
         paginator = Paginator(items, paginate_by,

snpdb/grids.py

@@ -334,6 +334,7 @@ def __init__(self, *args, **kwargs):
         self._count = None
         self.queryset_is_sorted = False
         self.sort_by_contig_and_position = False
+        self.use_iterator_if_no_pagination = True  # Paginator disabled on downloads
 
     def _get_standard_overrides(self, af_show_in_percent):
         overrides = {