Define 'page' query field name in one place.

rest_framework/pagination.py

@@ -3,7 +3,11 @@ from rest_framework import serializers
 # TODO: Support URLconf kwarg-style paging
 
 
-class NextPageField(serializers.Field):
+class PageField(serializers.Field):
+    page_field = 'page'
+
+
+class NextPageField(PageField):
     """
     Field that returns a link to the next page in paginated results.
     """
@@ -12,16 +16,16 @@ class NextPageField(serializers.Field):
             return None
         page = value.next_page_number()
         request = self.context.get('request')
-        relative_url = '?page=%d' % page
+        relative_url = '?%s=%d' % (self.page_field, page)
         if request:
             for field, value in request.QUERY_PARAMS.iteritems():
-                if field != 'page':
+                if field != self.page_field:
                     relative_url += '&%s=%s' % (field, value)
             return request.build_absolute_uri(relative_url)
         return relative_url
 
 
-class PreviousPageField(serializers.Field):
+class PreviousPageField(PageField):
     """
     Field that returns a link to the previous page in paginated results.
     """
@@ -30,10 +34,10 @@ class PreviousPageField(serializers.Field):
             return None
         page = value.previous_page_number()
         request = self.context.get('request')
-        relative_url = '?page=%d' % page
+        relative_url = '?%s=%d' % (self.page_field, page)
         if request:
             for field, value in request.QUERY_PARAMS.iteritems():
-                if field != 'page':
+                if field != self.page_field:
                     relative_url += '&%s=%s' % (field, value)
             return request.build_absolute_uri(relative_url)
         return relative_url