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exceptions

Custom exceptions for the Bitfount codebase.

Classes​

BitfountEngineError​

class BitfountEngineError(*args, **kwargs):

Exception for any issues relating to the backend engine.

Ancestors​

BitfountError​

class BitfountError(*args, **kwargs):

Base exception class that all others should inherit from.

Subclasses​

BitfountVersionError​

class BitfountVersionError(*args, **kwargs):

Exception for issues related to version incompatibility.

Ancestors​

TaskValidationError​

class TaskValidationError(*args, **kwargs):

Exception for a task that fails schema/content validation.

Distinct from BitfountVersionError: this signals that the task configuration itself is invalid (e.g. a constraint violation or a missing required field) rather than that the task targets an incompatible version.

Ancestors​

UnsupportedCacheError​

class UnsupportedCacheError(*args, **kwargs):

Exception for a cache file whose physical schema this build cannot use.

Raised when a table is missing a column that the ORM for the version the table is recorded at declares. That is not a migration gap — a migration describes the delta between two settled versions, and this table never held a settled one — so there is nothing to migrate from and the cache file itself has to go.

Distinct from the KeyError ensure_types raises for a cache written by a newer SDK: there the schema is fine and this build merely cannot describe it. Here the schema is genuinely incomplete.

Ancestors​