peewee_validates.py 文件源码

def convert_field(self, name, field):
        """
        Convert a single field from a Peewee model field to a validator field.

        :param name: Name of the field as defined on this validator.
        :param name: Peewee field instance.
        :return: Validator field.
        """
        pwv_field = ModelValidator.FIELD_MAP.get(field.get_db_field(), StringField)

        validators = []
        required = not bool(getattr(field, 'null', True))
        choices = getattr(field, 'choices', ())
        default = getattr(field, 'default', None)
        max_length = getattr(field, 'max_length', None)
        unique = getattr(field, 'unique', False)

        if required:
            validators.append(validate_required())

        if choices:
            validators.append(validate_one_of([c[0] for c in choices]))

        if max_length:
            validators.append(validate_length(high=max_length))

        if unique:
            validators.append(validate_model_unique(
                field, self.instance.select(), self.pk_field, self.pk_value))

        if isinstance(field, peewee.ForeignKeyField):
            return ModelChoiceField(
                field.rel_model, field.to_field,
                default=default, validators=validators)

        if isinstance(field, ManyToManyField):
            return ManyModelChoiceField(
                field.rel_model, field.rel_model._meta.primary_key,
                default=default, validators=validators)

        return pwv_field(default=default, validators=validators)