Source code for galaxy.schema.fields

import re

ENCODED_DATABASE_ID_PATTERN = re.compile('[0-9a-f]+')
ENCODED_ID_LENGTH_MULTIPLE = 16


[docs]class EncodedDatabaseIdField(str):
    """
    Encoded Database ID validation.
    """

    @classmethod
    def __get_validators__(cls):
        # one or more validators may be yielded which will be called in the
        # order to validate the input, each validator will receive as an input
        # the value returned from the previous validator
        yield cls.validate

    @classmethod
    def __modify_schema__(cls, field_schema):
        # __modify_schema__ should mutate the dict it receives in place,
        # the returned value will be ignored
        field_schema.update(
            min_length=16,
            pattern='[0-9a-fA-F]+',
            examples=['0123456789ABCDEF'],
        )

[docs]    @classmethod
    def validate(cls, v):
        if not isinstance(v, str):
            raise TypeError('String required')
        if v.startswith("F"):
            # Library Folder ids start with an additional "F"
            len_v = len(v) - 1
        else:
            len_v = len(v)
        if len_v % ENCODED_ID_LENGTH_MULTIPLE:
            raise ValueError('Invalid id length, must be multiple of 16')
        v = v.lower()
        m = ENCODED_DATABASE_ID_PATTERN.fullmatch(v)
        if not m:
            raise ValueError('Invalid characters in encoded ID')
        return cls(v)

    def __repr__(self):
        return f'EncodedDatabaseID ({super().__repr__()})'