private bool IsToManyRelationshipBeingCleared(HasManyAttribute hasManyRelationship, TResource leftResource, object valueToAssign)
{
ICollection <IIdentifiable> newRightResourceIds = _collectionConverter.ExtractResources(valueToAssign);
object existingRightValue = hasManyRelationship.GetValue(leftResource);
HashSet <IIdentifiable> existingRightResourceIds =
_collectionConverter.ExtractResources(existingRightValue).ToHashSet(IdentifiableComparer.Instance);
existingRightResourceIds.ExceptWith(newRightResourceIds);
return(existingRightResourceIds.Any());
}
/// <summary>
/// Builds the <see cref="ResourceIdentifierObject"/>s for a HasMany relationship
/// </summary>
private List <ResourceIdentifierObject> GetRelatedResourceLinkage(HasManyAttribute relationship, IIdentifiable entity)
{
var relatedEntities = (IEnumerable)relationship.GetValue(entity);
var manyData = new List <ResourceIdentifierObject>();
if (relatedEntities != null)
{
foreach (IIdentifiable relatedEntity in relatedEntities)
{
manyData.Add(GetResourceIdentifier(relatedEntity));
}
}
return(manyData);
}
/// <summary>
/// Builds the <see cref="ResourceIdentifierObject"/>s for a HasMany relationship.
/// </summary>
private IList <ResourceIdentifierObject> GetRelatedResourceLinkageForHasMany(HasManyAttribute relationship, IIdentifiable resource)
{
var value = relationship.GetValue(resource);
var relatedResources = TypeHelper.ExtractResources(value);
var manyData = new List <ResourceIdentifierObject>();
if (relatedResources != null)
{
foreach (var relatedResource in relatedResources)
{
manyData.Add(GetResourceIdentifier(relatedResource));
}
}
return(manyData);
}