/// <summary>
///
/// </summary>
/// <param name="_graphDBType"></param>
/// <param name="myAttributes">Pass null if you want to delete the whole object with all attributes</param>
/// <param name="myListOfAffectedDBObjectUUIDs"></param>
/// <param name="_dbContext"></param>
/// <param name="myToken"></param>
/// <param name="myDBObjectCache"></param>
/// <returns></returns>
public Exceptional<IEnumerable<Vertex>> DeleteDBObjects(GraphDBType myGraphDBType, List<TypeAttribute> myAttributes, IEnumerable<Exceptional<DBObjectStream>> myListOfAffectedDBObjects)
{
//some stuff for queryResult
UInt64 deletionCounter = 0;
foreach (var aDBO in myListOfAffectedDBObjects)
{
if (aDBO.Failed())
{
return new Exceptional<IEnumerable<Vertex>>(new Error_LoadObject(aDBO.Value.ObjectLocation));
}
deletionCounter++;
if (!myAttributes.IsNullOrEmpty())
{
#region Delete some defined attributes
foreach (var Attr in myAttributes)
{
if (Attr.GetRelatedType(_dbContext.DBTypeManager).GetMandatoryAttributesUUIDs(_dbContext.DBTypeManager).Contains(Attr.UUID))
{
#region Attribute is mandatory - set default value
if ((Boolean)_dbContext.DBSettingsManager.GetSetting(SettingDefaultsOnMandatory.UUID, _dbContext, TypesSettingScope.TYPE, Attr.GetRelatedType(_dbContext.DBTypeManager)).Value.Value.Value)
{
//the attribute will be removed from the dbobject --> update index
var removeAttributefromIdxResult = RemoveDBObjectFromIndex(aDBO.Value, Attr.UUID);
if (removeAttributefromIdxResult.Failed())
{
return new Exceptional<IEnumerable<Vertex>>(removeAttributefromIdxResult);
}
var defaultExcept = SetDefaultValue(Attr, aDBO);
if (defaultExcept.Failed())
return new Exceptional<IEnumerable<Vertex>>(defaultExcept);
if (!defaultExcept.Value)
return new Exceptional<IEnumerable<Vertex>>(new Error_UpdateAttributeValue(Attr));
#region update idx
//--> update index
var updateAttributefromIdxResult = InsertDBObjectIntoIndex(aDBO.Value, Attr.UUID);
if (updateAttributefromIdxResult.Failed())
{
return new Exceptional<IEnumerable<Vertex>>(updateAttributefromIdxResult);
}
#endregion
}
else
return new Exceptional<IEnumerable<Vertex>>(new Error_MandatoryConstraintViolation(Attr.Name));
#endregion
}
else
{
//the attribute will be removed from the dbobject --> update index
var removeAttributefromIdxResult = RemoveDBObjectFromIndex(aDBO.Value, Attr.UUID);
if (removeAttributefromIdxResult.Failed())
{
return new Exceptional<IEnumerable<Vertex>>(removeAttributefromIdxResult);
}
if (!aDBO.Value.RemoveAttribute(Attr.UUID))
{
return new Exceptional<IEnumerable<Vertex>>(new Error_RemoveTypeAttribute(myGraphDBType, Attr));
}
}
}
var saveResult = aDBO.Value.Save();
if (!saveResult.Success())
{
return new Exceptional<IEnumerable<Vertex>>(saveResult);
}
#endregion
}
else
{
#region Remove complete DBO
var objID = aDBO.Value.ObjectUUID;
var backwardEdgeLoadExcept = _dbContext.DBObjectManager.LoadBackwardEdge(aDBO.Value.ObjectLocation);
if (!backwardEdgeLoadExcept.Success())
return new Exceptional<IEnumerable<Vertex>>(backwardEdgeLoadExcept.IErrors.First());
var backwarEdges = backwardEdgeLoadExcept.Value;
var removeResult = _dbContext.DBObjectManager.RemoveDBObject(myGraphDBType, aDBO.Value, _dbContext.DBObjectCache, _dbContext.SessionSettings);
if (!removeResult.Success())
{
return new Exceptional<IEnumerable<Vertex>>(removeResult);
}
if (backwarEdges != null)
{
var delEdgeRefs = DeleteObjectReferences(objID, backwarEdges);
if (!delEdgeRefs.Success())
return new Exceptional<IEnumerable<Vertex>>(delEdgeRefs.IErrors.First());
}
#endregion
}
}
if (deletionCounter == 0)
{
var result = new Exceptional<IEnumerable<Vertex>>(new List<Vertex>());
return result.PushIWarningT(new Warning_NoObjectsToDelete());
}
return new Exceptional<IEnumerable<Vertex>>(new List<Vertex>());
}
