private void OnBeforeDeleteInternal()
{
//We want to persist all the Inverse OneToManyCollection upon deletion. Let's remove all lists that doesn't
//need persistance first (all objects therein will be deleted in the database via delete cascades anyways)
foreach (var pi in DwarfHelper.GetOneToManyProperties(this))
{
var propertyAtt = OneToManyAttribute.GetAttribute(pi.ContainedProperty);
if (propertyAtt == null)
{
throw new NullReferenceException(pi.Name + " is missing the OneToMany attribute...");
}
if (!propertyAtt.IsInverse)
{
continue;
}
var obj = (IDwarfList)pi.GetValue(this);
var owningProp = oneToManyAlternateKeys.ContainsKey(pi.Name) ? oneToManyAlternateKeys[pi.Name] : GetType().Name;
obj.Cast <IDwarf>().ForEachX(x => PropertyHelper.SetValue(x, owningProp, null));
obj.SaveAllInternal <T>();
}
if (DbContextHelper <T> .DbContext.IsAuditLoggingSuspended || DwarfContext <T> .GetConfiguration().AuditLogService == null)
{
return;
}
var traces = (from ep in DwarfHelper.GetDBProperties(GetType()).Where(x => !x.Name.Equals("Id"))
let oldValue = originalValues[ep.Name]
where oldValue != null && (oldValue is string? !string.IsNullOrEmpty(oldValue.ToString()) : true)
select new AuditLogEventTrace {
PropertyName = ep.Name, OriginalValue = oldValue
}).ToArray();
var collectionTraces = (from ep in DwarfHelper.GetGemListProperties(GetType())
let oldValue = (IGemList)ep.GetValue(this)
where oldValue != null && oldValue.Count > 0
select new AuditLogEventTrace {
PropertyName = ep.Name, OriginalValue = oldValue
}).ToArray();
var many2ManyTraces = (from ep in DwarfHelper.GetManyToManyProperties(GetType())
let oldValue = ep.GetValue(this)
where oldValue != null && ((IList)oldValue).Count > 0
select new AuditLogEventTrace {
PropertyName = ep.Name, OriginalValue = oldValue
}).ToArray();
DwarfContext <T> .GetConfiguration().AuditLogService.Logg(this, AuditLogTypes.Deleted, traces.Union(collectionTraces).Union(many2ManyTraces).ToArray());
}
/// <summary>
/// Restores the object's properties to their original values
/// </summary>
public void Refresh()
{
//Fetch the original values from the database (bypass the cache...)
var originalObject = DwarfContext <T> .GetDatabase().SelectReferencing <T>(new QueryBuilder().Select <T>().From <T>().Where(this, Cfg.PKProperties[DwarfHelper.DeProxyfy(this)]), false, true).FirstOrDefault();
if (originalObject != null)
{
foreach (var ep in DwarfHelper.GetDBProperties(GetType()))
{
SetOriginalValue(ep.Name, ep.GetValue(originalObject));
}
}
//Else should we throw an exception since the object has been deleted from the DB?
Reset();
}
/// <summary>
/// Creates and returns an AuditLogEventTrace object for every modified property
/// </summary>
private AuditLogEventTrace[] CreateTraceEventsForProperties()
{
if (!IsSaved)
{
return(new AuditLogEventTrace[0]);
}
if (originalValues == null)
{
var fromDB = !typeof(T).Implements <ICompositeId>()
? Load(Id.Value)
: Load(DwarfHelper.GetPKProperties <T>().Select(x => new WhereCondition <T> {
ColumnPi = x.ContainedProperty, Value = x.GetValue(this)
}).ToArray());
if (fromDB == null)
{
return(new AuditLogEventTrace[0]);
}
originalValues = fromDB.originalValues;
}
var dbProps = from ep in DwarfHelper.GetDBProperties(GetType())
let oldValue = originalValues[ep.Name]
let x = ep.GetValue(this)
let newValue = x is IDwarf ? ((IDwarf)ep.GetValue(this)).Id : ep.GetValue(this)
where (oldValue != null && !oldValue.Equals(newValue)) || (oldValue == null && newValue != null)
select new AuditLogEventTrace {
PropertyName = ep.Name, OriginalValue = oldValue, NewValue = newValue
};
var collections = from ep in DwarfHelper.GetGemListProperties(GetType())
where IsCollectionInitialized(ep.ContainedProperty)
let x = (IGemList)ep.GetValue(this)
let newValue = x
let oldValue = x.Parse((string)originalValues[ep.Name] ?? string.Empty)
where (oldValue != null && !oldValue.ComparisonString.Equals(newValue.ComparisonString)) || (oldValue == null && newValue != null)
select new AuditLogEventTrace {
PropertyName = ep.Name, OriginalValue = oldValue, NewValue = newValue
};
return(dbProps.Concat(collections).ToArray());
}
/// <summary>
/// Dwarf comparison is done via the Id property
/// </summary>
public override bool Equals(object obj)
{
if (obj is IDwarf)
{
var type = DwarfHelper.DeProxyfy(GetType());
if (type != DwarfHelper.DeProxyfy(obj))
{
return(false);
}
if (!type.Implements <ICompositeId>())
{
//Should both objects not be stored they'll both have null as Id, thus we check all the properties to find out if they might be the same object
//We also dubbelcheck all unique properties (if existant) to make sure they're NOT equal
if (!Id.HasValue && !((IDwarf)obj).Id.HasValue)
{
var propertiesMatch = DwarfHelper.GetDBProperties(type).Where(ep => ep.GetValue(this) != null && ep.GetValue(obj) != null).All(pi => pi.GetValue(this).Equals(pi.GetValue(obj)));
var uniqueProps = DwarfHelper.GetUniqueDBProperties <T>(type).ToList();
if (uniqueProps.Any())
{
var uniquePropertiesMatch = uniqueProps.All(ep => ep.GetValue(this) == null ? ep.GetValue(obj) == null : ep.GetValue(this).Equals(ep.GetValue(obj)));
return(uniquePropertiesMatch && propertiesMatch);
}
return(propertiesMatch);
}
return(Id == ((IDwarf)obj).Id);
}
return(Cfg.PKProperties[type].All(ep => ep.GetValue(this) == null ? ep.GetValue(obj) == null : ep.GetValue(this).Equals(ep.GetValue(obj))));
}
return(false);
}
/// <summary>
/// Append the Save method with additional modifications
/// </summary>
private void OnAfterSaveInternal()
{
foreach (var ep in DwarfHelper.GetDBProperties(GetType()))
{
SetOriginalValue(ep.Name, ep.GetValue(this));
}
foreach (var ep in DwarfHelper.GetGemListProperties(GetType()))
{
if (IsCollectionInitialized(ep.ContainedProperty))
{
SetOriginalValue(ep.Name, ep.GetValue(this));
}
}
foreach (var ep in DwarfHelper.GetManyToManyProperties(GetType()))
{
if (IsCollectionInitialized(ep.ContainedProperty))
{
SetOriginalValue(ep.Name, ep.GetValue(this));
}
}
}
