changing django_filters types in the ES filters by graphene types

graphene_django/elasticsearch/filter/filters.py

@@ -1,15 +1,13 @@
 """Filters to ElasticSearch"""
 from collections import OrderedDict
-from django_filters import CharFilter
 from elasticsearch_dsl import Q
+from graphene import String
 
 
 class StringFilterES(object):  # pylint: disable=R0902
     """String Fields specific to ElasticSearch."""
 
     default_expr = 'contain'
-    filter_class = CharFilter
-
     variants = {
         "contain": lambda name, value: Q('match',
                                          **{name: {
@@ -27,6 +25,7 @@ class StringFilterES(object):  # pylint: disable=R0902
         """
         assert name or attr, "At least the field name or the field attr should be passed"
         self.field_name = name or attr.replace('.', '_')
+        self.argument = String().Argument()
         self.fields = self.generate_fields()
 
     def generate_fields(self):
@@ -40,6 +39,6 @@ class StringFilterES(object):  # pylint: disable=R0902
         for variant in self.variants:
             variant_name = self.field_name if variant in ["default", self.default_expr] \
                 else "%s_%s" % (self.field_name, variant)
-            fields[variant_name] = self.filter_class(field_name=variant_name)
+            fields[variant_name] = self.argument
 
         return fields

graphene_django/filter/utils.py

@@ -1,4 +1,5 @@
 import six
+from graphene import Argument
 
 from .filterset import custom_filterset_factory, setup_filterset
 
@@ -12,8 +13,13 @@ def get_filtering_args_from_filterset(filterset_class, type):
 
     args = {}
     for name, filter_field in six.iteritems(filterset_class.base_filters):
+
+        if not isinstance(filter_field, Argument):
             field_type = convert_form_field(filter_field.field).Argument()
             field_type.description = filter_field.label
+        else:
+            field_type = filter_field
+
         args[name] = field_type
 
     return args