Function: resolveRelationsCacheService()

function resolveRelationsCacheService(
  model: LucidModel,
  perModelResolver?: RelationsCacheServiceResolver,
): Promise<CacheServiceLike | null>;

Resolves the cache service for a model via the precedence chain: per-model resolver → process-wide default → null (uncached).

Returns null only when the selected resolver itself returns null (an intentional opt-out). If the selected resolver throws or fails to acquire the cache, the error propagates — callers on the read path must fail loud, while the write-through hook guards this call to stay best-effort (ADR-007). Resolved instances are memoized per model; a premature null is never cached.

Parameters

Parameter	Type	Description
model	LucidModel	The Lucid model whose cache service should be resolved.
perModelResolver?	RelationsCacheServiceResolver	The model's own relationsCacheService option, if any.

Returns

Promise<CacheServiceLike | null>

The resolved cache service, or null when caching is opted out.