public static class PAYTRACK_PARTNER_Extension
{
    public static IQueryable<PAYTRACK_PARTNER> WhereInPayer(this IQueryable<PAYTRACK_PARTNER> query, int payerId)
    {
        var result = query.Where(q => q.payer_id == payerId);
        return result;
    }

    public static IEnumerable<PAYTRACK_PARTNER> WhereInPayer(this IEnumerable<PAYTRACK_PARTNER> query, int payerId)
    {
        var result = query.Where(q => q.payer_id == payerId);
        return result;
    }

    public static IQueryable<PAYTRACK_PARTNER> WhereInPayee(this IQueryable<PAYTRACK_PARTNER> query, int payeeId)
    {
        var result = query.Where(q => q.payee_id == payeeId);
        return result;
    }

    public static IEnumerable<PAYTRACK_PARTNER> WhereInPayee(this IEnumerable<PAYTRACK_PARTNER> query, int payeeId)
    {
        var result = query.Where(q => q.payee_id == payeeId);
        return result;
    }


    public static IQueryable<PAYTRACK_PARTNER> WhereIsNotApproved(this IQueryable<PAYTRACK_PARTNER> query)
    {
        var result = query.Where(q => q.partner_is_approve.GetValueOrDefault(false).Equals(false));
        return result;
    }

    public static IEnumerable<PAYTRACK_PARTNER> WhereIsNotApproved(this IEnumerable<PAYTRACK_PARTNER> query)
    {
        var result = query.Where(q => q.partner_is_approve.GetValueOrDefault(false).Equals(false));
        return result;
    }

    public static PAYTRACK_PARTNER SingleByPayerAndPayee(this IQueryable<PAYTRACK_PARTNER> query, int payerId, int payeeId)
    {
        var result = query.Single(q => q.payer_id == payerId && q.payee_id == payeeId);
        return result;
    }

    public static PAYTRACK_PARTNER SingleByPayerAndPayee(this IEnumerable<PAYTRACK_PARTNER> query, int payerId, int payeeId)
    {
        var result = query.Single(q => q.payer_id == payerId && q.payee_id == payeeId);
        return result;
    }
}

public static IQueryable<PAYTRACK_PARTNER> WhereInPayer(
    this IQueryable<PAYTRACK_PARTNER> query, int payerId)
{
    var result = query.Where(q => q.payer_id == payerId);
    return result;
}

public static IEnumerable<PAYTRACK_PARTNER> WhereInPayer(
     this IEnumerable<PAYTRACK_PARTNER> query, int payerId)
{
     return query.AsQueryable().WhereInPayer(payerId);
}