ValidationCache

This extension adds LRU caching to the validation step of query execution to improve performance by caching the validation errors in memory.

Usage example:

import strawberry
from strawberry.extensions import ValidationCache




@strawberry.type
class Query:
    @strawberry.field
    def hello(self) -> str:
        return "Hello, world!"




schema = strawberry.Schema(
    Query,
    extensions=[
        ValidationCache(),
    ],
)

API reference:

class ValidationCache(maxsize=128): ...

maxsize: Optional[int] = 128

Set the maxsize of the cache. By default the cache is bounded to 128 entries, with the least recently used entries evicted first. Pass an explicit maxsize=None to let the cache grow without bound; only do this when the set of distinct query texts reaching the server is trusted and bounded, as an unbounded cache lets clients grow the server’s memory indefinitely by sending unique query texts.

More info: https://docs.python.org/3/library/functools.html#functools.lru_cache

More examples:

Using maxsize
import strawberry
from strawberry.extensions import ValidationCache




@strawberry.type
class Query:
    @strawberry.field
    def hello(self) -> str:
        return "Hello, world!"




schema = strawberry.Schema(
    Query,
    extensions=[
        ValidationCache(maxsize=100),
    ],
)