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Source code for galaxy.schema.fields
import re
from typing import Optional
from pydantic import Field
from galaxy.security.idencoding import IdEncodingHelper
ENCODED_DATABASE_ID_PATTERN = re.compile('f?[0-9a-f]+')
ENCODED_ID_LENGTH_MULTIPLE = 16
[docs]class BaseDatabaseIdField:
"""
Database ID validation.
"""
security: IdEncodingHelper
@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'],
type="string",
)
def __repr__(self):
return f'DatabaseID ({super().__repr__()})'
[docs]class DecodedDatabaseIdField(int, BaseDatabaseIdField):
[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"
v = v[1:]
len_v = len(v)
if len_v % ENCODED_ID_LENGTH_MULTIPLE:
raise ValueError('Invalid id length, must be multiple of 16')
m = ENCODED_DATABASE_ID_PATTERN.fullmatch(v.lower())
if not m:
raise ValueError('Invalid characters in encoded ID')
return cls(cls.security.decode_id(v))
[docs]class EncodedDatabaseIdField(str, BaseDatabaseIdField):
[docs] @classmethod
def validate(cls, v):
if isinstance(v, int):
return cls(cls.security.encode_id(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')
m = ENCODED_DATABASE_ID_PATTERN.fullmatch(v.lower())
if not m:
raise ValueError('Invalid characters in encoded ID')
return cls(v)
[docs]def ModelClassField(class_name: str) -> str:
"""Represents a database model class name annotated as a constant
pydantic Field.
:param class_name: The name of the database class.
:return: A constant pydantic Field with default annotations for model classes.
"""
return Field(
class_name,
title="Model class",
description="The name of the database model class.",
const=True, # Make this field constant
)
[docs]def OrderParamField(default_order: str) -> Optional[str]:
return Field(
default=default_order,
title="Order",
description=(
"String containing one of the valid ordering attributes followed (optionally) "
"by '-asc' or '-dsc' for ascending and descending order respectively. "
"Orders can be stacked as a comma-separated list of values."
),
example="name-dsc,create_time",
)