DjangoFilterBackend.get_filterset_kwargs doesn't modify data dict while iterating

CHANGELOG.md

@@ -13,6 +13,7 @@ any parts of the framework not mentioned in the documentation should generally b
 ### Fixed
 
 * Avoid exception when trying to include skipped relationship
+* Don't swallow `filter[]` params when there are several
 
 ## [2.7.0] - 2019-01-14
 

example/tests/test_filters.py

@@ -503,3 +503,18 @@ def test_param_duplicate(self):
         dja_response = response.json()
         self.assertEqual(dja_response['errors'][0]['detail'],
                          "repeated query parameter not allowed: sort")
+
+    def test_many_params(self):
+        """
+        Test that filter params aren't ignored when many params are present
+        """
+        response = self.client.get(self.url,
+                                   data={'filter[headline.regex]': '^A',
+                                         'filter[body_text.regex]': '^IN',
+                                         'filter[blog.name]': 'ANTB',
+                                         'page[size]': 3})
+        self.assertEqual(response.status_code, 200,
+                         msg=response.content.decode("utf-8"))
+        dja_response = response.json()
+        self.assertEqual(len(dja_response['data']), 1)
+        self.assertEqual(dja_response['data'][0]['id'], '1')

rest_framework_json_api/django_filters/backends.py

@@ -4,7 +4,6 @@
 from django_filters.rest_framework import DjangoFilterBackend
 from rest_framework.exceptions import ValidationError
 from rest_framework.settings import api_settings
-
 from rest_framework_json_api.utils import format_value
 
 
@@ -102,7 +101,7 @@ def get_filterset_kwargs(self, request, queryset, view):
         filter_keys = []
         # rewrite filter[field] query params to make DjangoFilterBackend work.
         data = request.query_params.copy()
-        for qp, val in data.items():
+        for qp, val in request.query_params.items():
             m = self.filter_regex.match(qp)
             if m and (not m.groupdict()['assoc'] or
                       m.groupdict()['ldelim'] != '[' or m.groupdict()['rdelim'] != ']'):