Fixed #3235 - A querydict which yields a list with only one value now correctly…

Fixed #3235 - A querydict which yields a list with only one value now correctly returns the provided data.

rest_framework/fields.py

@@ -1384,7 +1384,7 @@ class ListField(Field):
         # lists in HTML forms.
         if html.is_html_input(dictionary):
             val = dictionary.getlist(self.field_name, [])
-            if len(val) > 1:
+            if len(val) > 0:
                 # Support QueryDict lists in HTML input.
                 return val
             return html.parse_html_list(dictionary, prefix=self.field_name)