public string AsSqlString()
{
var selectFragment = QueryAttributes
.Select(attr => $"{attr.DeclaredIn.EntityName}.{attr.DataBaseColumn}")
.Aggregate("", (s1, s2) => s1 == "" ? $"{s2}" : $"{s1}, {s2}");
var fromFragment = _from.AsFromFragment();
var whereFragment = _whereFilters.Select(w => w.AsSqlString()).Aggregate("", (w1, w2) => w1 == "" ? $"{w2}" :$"{w1} AND {w2}");
return($"SELECT {selectFragment} " +
$"FROM {fromFragment} " +
(whereFragment == ""
? ""
: $"WHERE {whereFragment} "));
}
public string AsFromFragment()
{
var thisEntity = _thisEntity.AsFromFragment();
var thisAlias = _thisEntity.HasAlias() ? _thisEntity.GetAlias() : null;
var joinedEntity = _joinedEntity.AsFromFragment();
var joinedAlias = _joinedEntity.HasAlias() ? _joinedEntity.GetAlias() : null;
return($"({thisEntity}{(_thisEntity.HasAlias() ? $" as {thisAlias}" : "")}" +
" INNER JOIN " +
$"{joinedEntity} {(_joinedEntity.HasAlias() ? $" as {joinedAlias}" : "")}" +
" ON " +
$"{(_thisEntity.HasAlias() ? $"{thisAlias}." : "")}{_thisJoinAttr.DataBaseColumn} " +
" = " +
$"{(_joinedEntity.HasAlias() ? $"{joinedAlias}." : "")}{_joinedAttr.DataBaseColumn})" +
$"{(HasAlias() ? $" as {GetAlias()}" : "")}");
}