Method __init__

rest_framework/fields.py:688–692

(self, **kwargs)

    NULL_VALUES = {'null', '', None}

    def __init__(self, **kwargs):
        if kwargs.get('allow_null', False):
            self.default_empty_html = None
            self.initial = None
        super().__init__(**kwargs)

    @staticmethod
    def _lower_if_str(value):