private void DeleteLink(TKey key, string navigationProperty, object linkedObject)
{
IEdmNavigationProperty edmNavigationProperty = GenericNavigationPropertyRoutingConvention.GetNavigationProperty(Request.ODataProperties().Path);
Contract.Assert(navigationProperty == edmNavigationProperty.Name);
// Find the containing entity
TEntity entity = DbSet.Find(key);
if (entity == null)
{
string error = string.Format("Entity lookup failed for key {0} in {1}", key, DbSet);
throw new ArgumentException(error, "key");
}
if (edmNavigationProperty.Type.IsCollection())
{
if (linkedObject == null)
{
throw new ArgumentNullException("linkedObject", "A valid object to be deleted must be provided to remove from a collection property.");
}
object propertyCollection = entity.GetPropertyValue(navigationProperty);
propertyCollection.InvokeMethod("Remove", linkedObject);
}
else
{
entity.SetPropertyValue(navigationProperty, null);
}
this.OnChangeSetSuccess(SaveChanges);
}
public override CreatedItemResult <TProperty> PostNavigationProperty <TProperty>([ModelBinder(typeof(ChangeSetEntityModelBinder))] TEntity entity,
string navigationProperty,
TProperty propertyEntity)
{
IEdmNavigationProperty edmNavigationProperty = GenericNavigationPropertyRoutingConvention.GetNavigationProperty(Request.ODataProperties().Path);
Contract.Assert(navigationProperty == edmNavigationProperty.Name);
// Add the new propertyEntity to the appropriate DbSet; Find its EntitySet first
//IEdmEntityType edmEntityType = edmNavigationProperty.ToEntityType();
//IEntitySetMetadata entitySetMetadata = ContainerMetadata.GetEntitySetFor(edmEntityType);
//if (entitySetMetadata == null)
//{
// throw new InvalidOperationException("Unable to find the entityset for entity type " + edmEntityType.ToTraceString());
//}
//Db.AddEntity(entitySetMetadata.Name, propertyEntity);
if (edmNavigationProperty.Type.IsCollection())
{
object propertyCollection = entity.GetPropertyValue(navigationProperty);
propertyCollection.InvokeMethod("Add", propertyEntity);
}
else
{
entity.SetPropertyValue(navigationProperty, propertyEntity);
}
this.OnChangeSetSuccess(SaveChanges);
return(Created(propertyEntity));
}
public override void CreateLink([ModelBinder(typeof(ChangeSetEntityModelBinder))] TEntity entity, string navigationProperty, [FromBody] Uri link)
{
IEdmNavigationProperty edmNavigationProperty = GenericNavigationPropertyRoutingConvention.GetNavigationProperty(Request.ODataProperties().Path);
Contract.Assert(navigationProperty == edmNavigationProperty.Name);
// Fetch the linked object either via a ChangeSet/Content-ID reference, or by fetching it from the database.
object linkedObject = null;
if (!Request.ContentIdReferenceToEntity(link.OriginalString, out linkedObject))
{
linkedObject = GetEntityForLink(link);
}
if (linkedObject == null)
{
throw new ArgumentException(string.Format("Link: {0} could not be resolved to an entity", link), "link");
}
if (edmNavigationProperty.Type.IsCollection())
{
object propertyCollection = entity.GetPropertyValue(navigationProperty);
propertyCollection.InvokeMethod("Add", linkedObject);
}
else
{
entity.SetPropertyValue(navigationProperty, linkedObject);
}
this.OnChangeSetSuccess(SaveChanges);
}
/// <summary>
/// Handles GET requests on navigation properties.
/// </summary>
/// <typeparam name="TProperty"></typeparam>
/// <param name="key"></param>
/// <param name="navigationProperty"></param>
/// <param name="queryOptions"></param>
/// <returns></returns>
public virtual HttpResponseMessage GetNavigationProperty<TProperty>([FromODataUri] TKey key, string navigationProperty, ODataQueryOptions<TProperty> queryOptions)
where TProperty : class
{
Contract.Requires<ArgumentException>(! string.IsNullOrWhiteSpace(navigationProperty));
Contract.Requires<ArgumentNullException>(queryOptions != null);
queryOptions.Validate(QueryValidationSettings);
IEdmNavigationProperty edmNavigationProperty = GenericNavigationPropertyRoutingConvention.GetNavigationProperty(Request.ODataProperties().Path);
Contract.Assert(navigationProperty == edmNavigationProperty.Name);
IQueryable<TEntity> query = GetEntityWithNavigationPropertyQuery<TProperty>(key, edmNavigationProperty);
// TODO: Make this work to support $expand on GET navigation property
//IQueryable<TProperty> query = GetKeyBasedNavigationPropertyQuery(key, navigationProperty, edmNavigationProperty);
//IQueryable queryOptionsApplied = queryOptions.ApplyTo(query);
return Request.CreateSingleEntityProjectedResponse(query, entity => entity.GetPropertyValue(navigationProperty));
}
public override void DeleteLink([FromODataUri] TKey key, string relatedKey, string navigationProperty)
{
IEdmNavigationProperty edmNavigationProperty = GenericNavigationPropertyRoutingConvention.GetNavigationProperty(Request.ODataProperties().Path);
Contract.Assert(navigationProperty == edmNavigationProperty.Name);
// Get the DbSet containing the linked object
IEdmSchemaType schemaType = ((Microsoft.Data.Edm.Library.EdmNavigationProperty)edmNavigationProperty.Partner).DeclaringEntityType;
Type relatedType = ContainerMetadata.GetEntitySetFor(schemaType).ElementTypeMetadata.ClrType;
object linkKey = ODataUriUtils.ConvertFromUriLiteral(relatedKey,
ODataVersion.V3,
Request.ODataProperties().Model,
Request.ODataProperties().Path.EntitySet.GetSingleKeyType());
object linkedObject = Db.Set(relatedType).Find(linkKey);
if (linkedObject == null)
{
throw new ArgumentException(string.Format("Link: {0}.{1} could not be resolved to an entity", navigationProperty, relatedKey), "link");
}
DeleteLink(key, navigationProperty, linkedObject);
}