private IColumn GetColumn(MemberInfo[] members)
{
IFieldFinder?current = (Table)this.Table;
Field? field = null;
for (int i = 0; i < members.Length - 1; i++)
{
if (current == null)
{
throw new InvalidOperationException("{0} does not implement {1}".FormatWith(field, typeof(IFieldFinder).Name));
}
field = current.GetField(members[i]);
current = field as IFieldFinder;
}
var lastMember = members[members.Length - 1];
if (lastMember is Type t)
{
return(((FieldImplementedBy)field !).ImplementationColumns.GetOrThrow(t));
}
else if (current != null)
{
return((IColumn)current.GetField(lastMember));
}
else
{
throw new InvalidOperationException("Unexpected");
}
}
internal override Expression GetExpression(Alias tableAlias, QueryBinder binder, Expression id)
{
var implementations = ImplementationColumns.SelectDictionary(t => t, (t, ic) =>
new EntityExpression(t, new PrimaryKeyExpression(new ColumnExpression(ic.Type.Nullify(), tableAlias, ic.Name)), null, null, null, AvoidExpandOnRetrieving));
var result = new ImplementedByExpression(IsLite ? Lite.Extract(FieldType) : FieldType, SplitStrategy, implementations);
if (this.IsLite)
{
return(binder.MakeLite(result, null));
}
else
{
return(result);
}
}
