public override void PrepareUpdateStatement(IDbCommand dbCmd, T item, bool excludeDefaults = false)
{
CopyParamsTo(dbCmd);
var setFields = new StringBuilder();
foreach (var fieldDef in ModelDef.FieldDefinitions)
{
if (UpdateFields.Count > 0 && !UpdateFields.Contains(fieldDef.Name) || fieldDef.AutoIncrement)
continue; // added
var value = fieldDef.GetValue(item);
if (excludeDefaults
&& (value == null || (!fieldDef.IsNullable && value.Equals(value.GetType().GetDefaultValue()))))
continue;
if (setFields.Length > 0)
setFields.Append(", ");
var param = DialectProvider.AddParam(dbCmd, value, fieldDef.ColumnType);
setFields
.Append(DialectProvider.GetQuotedColumnName(fieldDef.FieldName))
.Append("=")
.Append(param.ParameterName);
}
if (setFields.Length == 0)
throw new ArgumentException("No non-null or non-default values were provided for type: " + typeof(T).Name);
dbCmd.CommandText = string.Format("UPDATE {0} SET {1} {2}",
DialectProvider.GetQuotedTableName(ModelDef), setFields, WhereExpression);
}