Fix `UnicodeDecodeError`, which can occur on serializer `repr`.

[lu911]

Sorry.. I can't speak english well.

Please, see some codes.

class Location(models.Model):
   name = models.CharField(max_length=10)


class LocationSerializer(serializers.ModelSerializer):

    class Meta:
        model = Location

l = Location(name=u'한국')  <<< Unicode
l.save()

s = LocationSerializer(instance=l)
print s

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/home/loup/.virtualenvs/django-chat/local/lib/python2.7/site-packages/rest_framework/serializers.py", line 399, in __repr__
    return representation.serializer_repr(self, indent=1)
  File "/home/loup/.virtualenvs/django-chat/local/lib/python2.7/site-packages/rest_framework/utils/representation.py", line 77, in serializer_repr
    ret += '\n' + indent_str + field_name + ' = '
UnicodeDecodeError: 'ascii' codec can't decode byte 0xec in position 39: ordinal not in range(128

[lu911]

My patch

utils/representation.py

def serializer_repr(serializer, indent, force_many=None):
    ret = field_repr(serializer, force_many) + ':'
    indent_str = '    ' * indent

    if force_many:
        fields = force_many.fields
    else:
        fields = serializer.fields

    for field_name, field in fields.items():
        field_name = field_name.encode('utf-8')
        ret += '\n' + indent_str + field_name + ' = '
        if hasattr(field, 'fields'):
            ret += serializer_repr(field, indent + 1)
        elif hasattr(field, 'child'):
            ret += list_repr(field, indent + 1)
        elif hasattr(field, 'child_relation'):
            ret += field_repr(field.child_relation, force_many=field.child_relation)
        else:
            ret += field_repr(field)

    if serializer.validators:
        ret += '\n' + indent_str + 'class Meta:'
        ret += '\n' + indent_str + '    validators = ' + smart_repr(serializer.validators)

    return ret

test.py

class Location(models.Model):
   name = models.CharField(max_length=10, unique=True)


class LocationSerializer(serializers.ModelSerializer):

    class Meta:
        model = Location

l = Location(name=u'한국')  <<< Unicode
l.save()

s = LocationSerializer(instance=l)
print s

LocationSerializer(instance=<Location: 한국>):
    id = IntegerField(label='ID', read_only=True)
    name = CharField(max_length=10, validators=[<UniqueValidator(queryset=Location.objects.all())>])

[tomchristie]

Thanks for the report! :)

[lu911]

@tomchristie Thanks !