Merge pull request #46 from CarlosBorroto/show-all-pagination

Add support for disabling pagination (aka show all)

Author: izimobil

example/example/settings.py

@@ -138,5 +138,5 @@
         'rest_framework_datatables.filters.DatatablesFilterBackend',
     ),
     'DEFAULT_PAGINATION_CLASS': 'rest_framework_datatables.pagination.DatatablesPageNumberPagination',
-    'PAGE_SIZE': 50,
+    'PAGE_SIZE': 10,
 }

rest_framework_datatables/pagination.py

@@ -42,7 +42,10 @@ def paginate_queryset(self, queryset, request, view=None):
             return super(
                 DatatablesPageNumberPagination, self
             ).paginate_queryset(queryset, request, view)
-        if request.query_params.get('length') is None:
+
+        length = request.query_params.get('length')
+
+        if length is None or length == '-1':
             return None
         self.count, self.total_count = self.get_count_and_total_count(
             queryset, view

tests/test_api.py

@@ -41,9 +41,15 @@ def test_datatables_suffix(self):
 
     def test_pagenumber_pagination(self):
         response = self.client.get('/api/albums/?format=datatables&length=10&start=10&columns[0][data]=name&columns[1][data]=artist_name&draw=1')
-        expected = (15, 15, 'Elvis Presley')
+        expected = (15, 15, 5, 'Elvis Presley')
         result = response.json()
-        self.assertEquals((result['recordsFiltered'], result['recordsTotal'], result['data'][0]['artist_name']), expected)
+        self.assertEquals((result['recordsFiltered'], result['recordsTotal'], len(result['data']), result['data'][0]['artist_name']), expected)
+
+    def test_pagenumber_pagination_show_all(self):
+        response = self.client.get('/api/albums/?format=datatables&length=-1&columns[0][data]=name&columns[1][data]=artist_name&draw=1')
+        expected = (15, 15, 15, 'The Beatles')
+        result = response.json()
+        self.assertEquals((result['recordsFiltered'], result['recordsTotal'], len(result['data']), result['data'][0]['artist_name']), expected)
 
     def test_pagenumber_pagination_invalid_page(self):
         response = self.client.get('/api/albums/?format=datatables&length=10&start=20&columns[0][data]=name&columns[1][data]=artist_name&draw=1')