public override void PrepareUpdateStatement(IDbCommand dbCmd, T item, bool excludeDefaults = false)
{
CopyParamsTo(dbCmd);
var setFields = StringBuilderCache.Allocate();
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.AddUpdateParam(dbCmd, value, fieldDef);
setFields
.Append(DialectProvider.GetQuotedColumnName(fieldDef.FieldName))
.Append("=")
.Append(param.ParameterName);
}
var strFields = StringBuilderCache.ReturnAndFree(setFields);
if (strFields.Length == 0)
{
throw new ArgumentException("No non-null or non-default values were provided for type: " + typeof(T).Name);
}
dbCmd.CommandText = $"UPDATE {DialectProvider.GetQuotedTableName(ModelDef)} SET {strFields} {WhereExpression}";
}