toSql method
Implementation
String toSql() {
String sql = '';
for (var where in wheres) {
if (where == wheres.first) {
sql += where.toSql();
} else {
if (where.condition == QueryCondition.and) {
sql += ' AND ';
} else if (where.condition == QueryCondition.or) {
sql += ' OR ';
}
sql += where.toSql();
}
}
return sql;
}