/// <inheritdoc />
// triggered by GET /articles/1/relationships/{relationshipName}
public virtual async Task <TResource> GetRelationshipAsync(TId id, string relationshipName)
{
_traceWriter.LogMethodStart(new { id, relationshipName });
if (relationshipName == null)
{
throw new ArgumentNullException(nameof(relationshipName));
}
AssertRelationshipExists(relationshipName);
_hookExecutor?.BeforeRead <TResource>(ResourcePipeline.GetRelationship, id.ToString());
var secondaryLayer = _queryLayerComposer.Compose(_request.SecondaryResource);
secondaryLayer.Projection = _queryLayerComposer.GetSecondaryProjectionForRelationshipEndpoint(_request.SecondaryResource);
secondaryLayer.Include = null;
var primaryLayer = _queryLayerComposer.WrapLayerForSecondaryEndpoint(secondaryLayer, _request.PrimaryResource, id, _request.Relationship);
var primaryResources = await _repository.GetAsync(primaryLayer);
var primaryResource = primaryResources.SingleOrDefault();
AssertPrimaryResourceExists(primaryResource);
if (_hookExecutor != null)
{
_hookExecutor.AfterRead(AsList(primaryResource), ResourcePipeline.GetRelationship);
primaryResource = _hookExecutor.OnReturn(AsList(primaryResource), ResourcePipeline.GetRelationship).Single();
}
return(primaryResource);
}
/// <inheritdoc />
public virtual async Task <object> GetSecondaryAsync(TId id, string relationshipName, CancellationToken cancellationToken)
{
_traceWriter.LogMethodStart(new
{
id,
relationshipName
});
AssertHasRelationship(_request.Relationship, relationshipName);
_hookExecutor.BeforeReadSingle <TResource, TId>(id, ResourcePipeline.GetRelationship);
QueryLayer secondaryLayer = _queryLayerComposer.ComposeFromConstraints(_request.SecondaryResource);
QueryLayer primaryLayer = _queryLayerComposer.WrapLayerForSecondaryEndpoint(secondaryLayer, _request.PrimaryResource, id, _request.Relationship);
IReadOnlyCollection <TResource> primaryResources = await _repositoryAccessor.GetAsync <TResource>(primaryLayer, cancellationToken);
TResource primaryResource = primaryResources.SingleOrDefault();
AssertPrimaryResourceExists(primaryResource);
_hookExecutor.AfterReadSingle(primaryResource, ResourcePipeline.GetRelationship);
object secondaryResourceOrResources = _request.Relationship.GetValue(primaryResource);
if (secondaryResourceOrResources is ICollection secondaryResources && secondaryLayer.Pagination?.PageSize?.Value == secondaryResources.Count)
{
_paginationContext.IsPageFull = true;
}
return(_hookExecutor.OnReturnRelationship(secondaryResourceOrResources));
}
/// <inheritdoc />
public virtual async Task <object> GetSecondaryAsync(TId id, string relationshipName, CancellationToken cancellationToken)
{
_traceWriter.LogMethodStart(new
{
id,
relationshipName
});
AssertHasRelationship(_request.Relationship, relationshipName);
_hookExecutor.BeforeReadSingle <TResource, TId>(id, ResourcePipeline.GetRelationship);
QueryLayer secondaryLayer = _queryLayerComposer.ComposeFromConstraints(_request.SecondaryResource);
QueryLayer primaryLayer = _queryLayerComposer.WrapLayerForSecondaryEndpoint(secondaryLayer, _request.PrimaryResource, id, _request.Relationship);
if (_request.IsCollection && _options.IncludeTotalResourceCount)
{
// TODO: Consider support for pagination links on secondary resource collection. This requires to call Count() on the inverse relationship (which may not exist).
// For /blogs/1/articles we need to execute Count(Articles.Where(article => article.Blog.Id == 1 && article.Blog.existingFilter))) to determine TotalResourceCount.
// This also means we need to invoke ResourceRepository<Article>.CountAsync() from ResourceService<Blog>.
// And we should call BlogResourceDefinition.OnApplyFilter to filter out soft-deleted blogs and translate from equals('IsDeleted','false') to equals('Blog.IsDeleted','false')
}
IReadOnlyCollection <TResource> primaryResources = await _repositoryAccessor.GetAsync <TResource>(primaryLayer, cancellationToken);
TResource primaryResource = primaryResources.SingleOrDefault();
AssertPrimaryResourceExists(primaryResource);
_hookExecutor.AfterReadSingle(primaryResource, ResourcePipeline.GetRelationship);
object secondaryResourceOrResources = _request.Relationship.GetValue(primaryResource);
if (secondaryResourceOrResources is ICollection secondaryResources && secondaryLayer.Pagination?.PageSize?.Value == secondaryResources.Count)
{
_paginationContext.IsPageFull = true;
}
return(_hookExecutor.OnReturnRelationship(secondaryResourceOrResources));
}
