/// <summary>
/// Update the given entity in DbContext
/// </summary>
/// <param name="entity">The entity containing updated property</param>
/// <param name="includes">The complex properties that should be included in the Update</param>
/// <returns>The entity containing updates</returns>
/// <exception cref="System.InvalidOperationException">When the entity doesn't have a keyed property (i.e. an integer Id or a property with the KeyAttribute)</exception>
/// <exception cref="System.InvalidOperationException">When the existing entity can't be found by using the key</exception>
/// <exception cref="System.InvalidOperationException">If the included collection property of the entity doesn't implement Add or Remove</exception>
public virtual T Update(T entity, params string[] includes)
{
var key = GetKeyValue(entity);
var old = Find(key);
if (old == null)
{
throw new InvalidOperationException(string.Format("Entity with key {0} could not be found", key));
}
if (includes != null && includes.Length > 0)
{
RelationshipLoaderAdapter.Load(_dbContext, old, includes);
foreach (var property in entity.GetEnumerableProperties()
.Where(p => includes.Contains(p.Name)))
{
var newCollection = property.GetValue(entity, null) as ICollection;
var oldCollection = old.GetType()
.GetProperty(property.Name)
.GetValue(old, null) as ICollection;
var add = oldCollection.GetType().GetMethod("Add");
var remove = oldCollection.GetType().GetMethod("Remove");
if (add == null || remove == null)
{
throw new InvalidOperationException(string.Format("{0} must implement both Add and Remove methods", property.Name));
}
var comparer = new IdentifiableComparer();
var newIdentifiables = newCollection.OfType <IIdentifiable>();
var oldIdentifiables = oldCollection.OfType <IIdentifiable>();
var additions = newIdentifiables
.Where(item => !oldIdentifiables.Contains(item, comparer)).ToList();
foreach (var newItem in additions)
{
add.Invoke(oldCollection, new object[] { newItem });
}
;
var removals = oldIdentifiables
.Where(item => !newIdentifiables.Contains(item, comparer)).ToList();
foreach (var toDelete in removals)
{
remove.Invoke(oldCollection, new object[] { toDelete });
}
;
}
}
(_dbContext as Context).SetModified(old, entity);
return(entity);
}
public override void Act()
{
base.Act();
areEqual = new IdentifiableComparer().Equals(x, y);
}
