tomchristie/django-rest-framework — pull request #1866 by MattBlack85 (2014-09-11 14:02:51+00:00)
Title: Fix boolean validation when string is passed as value

the following example:

```python
class BoolSerializer(serializers.Serializer):
bool_field = serializer.BooleanField()
```

does behave in such case:

```Python
>>> s = BoolSerializer(data={'bool_field': 'somestring'})
>>> s.is_valid()
>>> True
```