public void Delete <T>(IList <T> storedEntities) where T : class
{
ExecutionHelper helper = new ExecutionHelper(this.database);
ITable <T> table = this.database.Tables.FindTable <T>();
// Find relations
// Do not add referred relations!
RelationGroup relations =
helper.FindRelations(table.Indexes, referred: false);
// Find referring entities
var referringEntities =
helper.FindReferringEntities <T>(storedEntities, relations.Referring);
// Delete invalid index records
for (int i = 0; i < storedEntities.Count; i++)
{
T storedEntity = storedEntities[i];
foreach (IIndex <T> index in table.Indexes)
{
index.Delete(storedEntity);
log.Log.WriteIndexDelete(index, storedEntity);
}
}
var cascadedRelations = relations.Referring.Where(x => x.Options.CascadedDeletion);
foreach (IRelationInternal index in cascadedRelations)
{
var entities = referringEntities[index];
if (entities.Count == 0)
{
continue;
}
index.CascadedDelete(entities, this);
// At this point these entities should have been removed from the database
// In order to avoid foreign key validation, clear the collection
//
// TODO: It might be better to do foreign key validation from the
// other direction: check if anything refers storedEntities
entities.Clear();
}
// Validate the entities that are referring to the deleted entities
helper.ValidateForeignKeys(relations.Referring, referringEntities);
}
