public static List <string> GetChangedProperties <T>(this Web.OData.Delta <T> value, T original, List <String> includeList = null) where T : class, new()
{
if (value == null)
{
throw new ArgumentNullException("value");
}
if (original == null)
{
throw new ArgumentNullException("original");
}
var changedProperties = value.GetChangedPropertyNames();
if (!changedProperties.Any())
{
return(new List <string>());
}
var compareObjects = new CompareObjects {
MaxDifferences = 100,
ElementsToInclude = includeList ?? value.GetChangedPropertyNames().ToList()
};
compareObjects.ElementsToInclude.Add(typeof(T).Name);
bool result = compareObjects.Compare(original, value.GetEntity());
return(!result?compareObjects.Differences.Select(d => d.PropertyName).Distinct().ToList() : new List <string>());
}
public static bool ContainsChangedProperty <T>(this Web.OData.Delta <T> value, Expression <Func <T, object> > action) where T : class, new()
{
if (!value.GetChangedPropertyNames().Any())
{
return(false);
}
MemberExpression expression = action.Body as MemberExpression ?? ((UnaryExpression)action.Body).Operand as MemberExpression;
return(expression != null && value.GetChangedPropertyNames().Contains(expression.Member.Name));
}
// TODO: Investigate work around for: http://aspnetwebstack.codeplex.com/workitem/562
public virtual HttpResponseMessage Patch(string id, Web.OData.Delta <TModel> value)
{
if (value == null || !value.GetChangedPropertyNames().Any())
{
return(BadRequestErrorResponseMessage());
}
TModel original = GetEntity(id);
if (original == null)
{
return(NotFoundErrorResponseMessage(id));
}
if (!CanUpdateEntity(original, value))
{
return(CannotUpdateReadOnlyPropertyResponseMessage());
}
UpdateEntity(original, value);
return(new HttpResponseMessage(HttpStatusCode.OK)); // NoContent
}
protected abstract TModel InsertEntity(TModel value); // TODO: User can currently specify the organization id to insert.
/// <summary>
/// A check to see if a document can be updated.
/// </summary>
/// <param name="original">The original document.</param>
/// <param name="value">The document.</param>
protected virtual bool CanUpdateEntity(TModel original, Web.OData.Delta <TModel> value)
{
return(value.GetChangedPropertyNames().Any());
}