internal static int SaveAll <T>(this IDbCommand dbCmd, IEnumerable <T> objs)
{
var saveRows = objs.ToList();
var firstRow = saveRows.FirstOrDefault();
if (Equals(firstRow, default(T)))
{
return(0);
}
var modelDef = typeof(T).GetModelDefinition();
var firstRowId = modelDef.GetPrimaryKey(firstRow);
var defaultIdValue = firstRowId?.GetType().GetDefaultValue();
var idMap = defaultIdValue != null
? saveRows.Where(x => !defaultIdValue.Equals(modelDef.GetPrimaryKey(x))).ToSafeDictionary(x => modelDef.GetPrimaryKey(x))
: saveRows.Where(x => modelDef.GetPrimaryKey(x) != null).ToSafeDictionary(x => modelDef.GetPrimaryKey(x));
var existingRowsMap = dbCmd.SelectByIds <T>(idMap.Keys).ToDictionary(x => modelDef.GetPrimaryKey(x));
var rowsAdded = 0;
IDbTransaction dbTrans = null;
if (dbCmd.Transaction == null)
{
dbCmd.Transaction = dbTrans = dbCmd.Connection.BeginTransaction();
}
try
{
var dialect = dbCmd.Dialect();
foreach (var row in saveRows)
{
var id = modelDef.GetPrimaryKey(row);
if (id != defaultIdValue && existingRowsMap.ContainsKey(id))
{
dbCmd.Update(row);
}
else
{
if (modelDef.HasAutoIncrementId)
{
var newId = dbCmd.Insert(row, commandFilter: null, selectIdentity: true);
var safeId = dialect.FromDbValue(newId, modelDef.PrimaryKey.FieldType);
modelDef.PrimaryKey.SetValue(row, safeId);
id = newId;
}
else
{
dbCmd.Insert(row, commandFilter: null);
}
rowsAdded++;
}
modelDef.RowVersion?.SetValue(row, dbCmd.GetRowVersion(modelDef, id));
}
dbTrans?.Commit();
}
finally
{
dbTrans?.Dispose();
if (dbCmd.Transaction == dbTrans)
{
dbCmd.Transaction = null;
}
}
return(rowsAdded);
}