model serializer field kwargs for blank=True charfield

[Alasdair321]

In terms of Django model field kwargs, blank=True allows model forms to submit empty values, these are stored as an empty string in the database.

In DRF, using a model serializer with a model with characteristics as follows:

Class Person(models.Model):
    name = models.CharField(max_length=255, blank=True)

Produces serializer field kwargs as follows (using the method rest_framework.utils.get_field_kwargs):

{'model_field': <django.db.models.fields.CharField: name>,
 'required': False,
 'allow_blank': True,
 'max_length': 255}

DRF has introduced a new and problematic kwarg: required: False as it found blank=True in the model field kwargs.

I believe the intended behaviour should be something like:
If field kwargs blank and not null -> required = True & default = ""

This would adhere to the behaviour of the model.