如何使用Servicestack.Ormlite将两个SqlExpression With和Condition结合在一起

Question

I need to filter out some data at generic class, I don't know how to join two SqlExpression<T> with AND condition. I tryed:

public List<T> Select(SqlExpression<T> expression)
{
    var list = new List<T>();
    using (var db = OpenConnection().Open())
    {
        if (_stores)
        {
            list = db.Select<T>(expression);
        }
        else
        {
            var q = db.From<T>().Where(x => (x as EntityBase).store_id == _store_id);
            list = db.Select<T>(q, expression);
        }
    }
    return list;
}

But this is not working

list = db.Select<T>(q, expression); // this is not working

Answer 1

SqlExpression<T> OrmLite's typed query builder, there can only be 1 query builder so you can't merge 2 query builders together, you need to apply whatever conditions you want to the existing query builder, eg:

public List<T> Select(SqlExpression<T> expression) =>
    db.Select(expression.And(x => (x as EntityBase).store_id == _store_id));