Interface IResourceLoader<TMessage, TResource>

Namespace: Trellis.Authorization

Assembly: Trellis.Authorization.dll

Loads the resource required for resource-based authorization. Registered in DI as scoped (typically depends on DbContext via a repository). Resolved per-request by the pipeline behavior via IServiceProvider.

public interface IResourceLoader<in TMessage, TResource>

Type Parameters

TMessage: The command or query type that triggers the resource load.
TResource: The type of resource to load.

Extension Methods: MaybeExtensions.AsMaybe<T>(T)

MaybeExtensions.ToResult<TValue>(TValue)

NullableExtensions.ToResult<T>(T?, Func<Error>)

NullableExtensions.ToResult<T>(T?, Error)

AggregateTestMutator.ClearMaybeField<TEntity, TValue>(TEntity, Expression<Func<TEntity, Maybe<TValue>>>)

AggregateTestMutator.SetMaybeField<TEntity, TValue>(TEntity, Expression<Func<TEntity, Maybe<TValue>>>, TValue?)

Remarks

Implement this interface directly when the loading logic is complex (e.g., composite keys, joins, or projections). For the common case of extracting an ID and calling a repository, use ResourceLoaderById<TMessage, TResource, TId>.

Methods

LoadAsync(TMessage, CancellationToken)

Loads the resource identified by the message.

Task<Result<TResource>> LoadAsync(TMessage message, CancellationToken cancellationToken)

Parameters

message TMessage: The command or query containing the resource identifier.
cancellationToken CancellationToken: Cancellation token.

Returns

Task<Result<TResource>>: A success result containing the loaded resource, or a failure result (typically NotFound(string, string?)) if the resource does not exist.