public bool Exists <T>()
{
var guid = StartMeasurement();
var result = _db.GetCollectionNames().Contains(typeof(T).Name);
StopMeasurement(guid, "Exists (LiteDB)");
return(result);
}
private void UpdateLookups(Type baseType, string changedListname, int oldId, int newId)
{
var db = new LiteDb(_helpers, _aweCsomeTable, _connectionString);
List <string> collectionNames = db.GetCollectionNames().ToList();
var subTypes = baseType.Assembly.GetTypes();
foreach (var subType in subTypes)
{
if (!collectionNames.Contains(subType.Name))
{
continue;
}
bool modifyId = FindLookupProperties(subType, changedListname, out List <PropertyInfo> lookupProperties, out List <PropertyInfo> virtualStaticProperties, out List <PropertyInfo> virtualDynamicProperties);
if (modifyId)
{
var collection = db.GetCollection(subType.Name);
var elements = collection.FindAll();
bool elementChanged = false;
foreach (var element in elements)
{
foreach (var lookupProperty in lookupProperties)
{
if (element[lookupProperty.Name].IsNull)
{
continue;
}
var targetType = element[lookupProperty.Name].GetType();
if (targetType == typeof(LiteDB.BsonDocument))
{
var bson = (LiteDB.BsonDocument)element[lookupProperty.Name];
var id = bson["_id"];
if (id == oldId)
{
bson["_id"] = newId;
element[lookupProperty.Name] = bson;
elementChanged = true;
}
}
else
{
bool isId = false;
int? tmpId = null;
try
{
tmpId = (int?)element[lookupProperty.Name];
isId = true;
}
catch (Exception ex)
{
_log.Warn($"Cannot cast as int. List to check: {subType.Name} TargetType: {targetType.FullName}, lookupProperty: {lookupProperty.Name}");
}
if (isId)
{
if (tmpId == oldId)
{
element[lookupProperty.Name] = newId;
elementChanged = true;
}
}
else
{
var idProperty = targetType.GetProperty("Id");
if (idProperty == null)
{
_log.Warn($"Unexpected LookupType. List to check: {subType.Name} TargetType: {targetType.FullName}, lookupProperty: {lookupProperty.Name}");
}
else
{
var id = idProperty.GetValue(element[lookupProperty.Name]);
if (id.Equals(oldId))
{
idProperty.SetValue(element[lookupProperty.Name], newId);
elementChanged = true;
}
}
}
}
}
foreach (var virtualStaticProperty in virtualStaticProperties)
{
if (!element.ContainsKey(virtualStaticProperty.Name))
{
continue;
}
if ((int?)element[virtualStaticProperty.Name] == oldId)
{
element[virtualStaticProperty.Name] = newId;
elementChanged = true;
}
}
foreach (var virtualDynamicProperty in virtualDynamicProperties)
{
var attribute = virtualDynamicProperty.GetCustomAttribute <VirtualLookupAttribute>();
if (!element.ContainsKey(attribute.DynamicTargetProperty))
{
continue;
}
if (element[attribute.DynamicTargetProperty] == changedListname)
{
if ((int?)element[virtualDynamicProperty.Name] == oldId)
{
element[virtualDynamicProperty.Name] = newId;
elementChanged = true;
}
}
}
if (elementChanged)
{
collection.Update(element);
}
}
}
}
}
