Method get_prep_value

django/db/models/fields/__init__.py:1576–1578

(self, value)

            )

    def get_prep_value(self, value):
        value = super().get_prep_value(value)
        return self.to_python(value)

    def get_db_prep_value(self, value, connection, prepared=False):
        # Casts dates into the format expected by the backend