Pydentic scheme for CacheConfiguration and RouteInfo

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Bug: Cache Configuration Validator Returns Inconsistent Types

The CacheConfiguration.invalidate_paths field validator (compile_paths) has inconsistent return types, violating its list[re.Pattern] | None annotation. It returns a single re.Pattern object for string or single pattern inputs, and can produce nested lists (e.g., list[list[re.Pattern]]) for nested list inputs. This type mismatch causes runtime errors when consuming code expects to iterate over a flat list of patterns.

fast_cache_middleware/schemas.py#L45-L59

FastCacheMiddleware/fast_cache_middleware/schemas.py

Lines 45 to 59 in 3b874de

	@field_validator("invalidate_paths")
	@classmethod
	def compile_paths(cls, item: Any) -> Any:
	if item is None:
	return None
	if isinstance(item, str):
	return re.compile(f"^{item}")
	if isinstance(item, re.Pattern):
	return item
	if isinstance(item, list):
	return [cls.compile_paths(i) for i in item]
	raise ValueError(
	"invalidate_paths must be a string, regex pattern, or list of them."
	)

Fix in Cursor

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Bug: Zero TTL Incorrectly Disables Caching

The condition if not cache_configuration.max_age: incorrectly disables caching when max_age is 0. This changes the previous behavior where max_age=0 was a valid TTL for immediate expiration. Caching should only be disabled when max_age is None.

fast_cache_middleware/middleware.py#L257-L259

FastCacheMiddleware/fast_cache_middleware/middleware.py

Lines 257 to 259 in 3b874de

	if not cache_configuration.max_age:
	return None

Fix in Cursor

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