public TableIndex AddIndex <T>(Expression <Func <T, object?> > fields,
Expression <Func <T, bool> >?where = null,
Expression <Func <T, object> >?includeFields = null) where T : Entity
{
var table = Schema.Table <T>();
IColumn[] columns = IndexKeyColumns.Split(table, fields);
var index = new TableIndex(table, columns);
if (where != null)
{
index.Where = IndexWhereExpressionVisitor.GetIndexWhere(where, table);
}
if (includeFields != null)
{
index.IncludeColumns = IndexKeyColumns.Split(table, includeFields);
if (table.SystemVersioned != null)
{
index.IncludeColumns = index.IncludeColumns.Concat(table.SystemVersioned.Columns()).ToArray();
}
}
AddIndex(index);
return(index);
}
public TableIndex AddIndexMList <T, V>(Expression <Func <T, MList <V> > > toMList,
Expression <Func <MListElement <T, V>, object> > fields,
Expression <Func <MListElement <T, V>, bool> >?where = null,
Expression <Func <MListElement <T, V>, object> >?includeFields = null)
where T : Entity
{
TableMList table = ((FieldMList)Schema.FindField(Schema.Table(typeof(T)), Reflector.GetMemberList(toMList))).TableMList;
IColumn[] columns = IndexKeyColumns.Split(table, fields);
var index = AddIndex(table, columns);
if (where != null)
{
index.Where = IndexWhereExpressionVisitor.GetIndexWhere(where, table);
}
if (includeFields != null)
{
index.IncludeColumns = IndexKeyColumns.Split(table, includeFields);
if (table.SystemVersioned != null)
{
index.IncludeColumns = index.IncludeColumns.Concat(table.SystemVersioned.Columns()).ToArray();
}
}
return(index);
}
static IColumn[] GetColumns(IFieldFinder finder, LambdaExpression field)
{
var body = field.Body;
Type?type = RemoveCasting(ref body);
body = IndexWhereExpressionVisitor.RemoveLiteEntity(body);
var members = Reflector.GetMemberListBase(body);
if (members.Any(a => ignoreMembers.Contains(a.Name)))
{
members = members.Where(a => !ignoreMembers.Contains(a.Name)).ToArray();
}
Field f = Schema.FindField(finder, members);
if (type != null)
{
var ib = f as FieldImplementedBy;
if (ib == null)
{
throw new InvalidOperationException("Casting only supported for {0}".FormatWith(typeof(FieldImplementedBy).Name));
}
return((from ic in ib.ImplementationColumns
where type.IsAssignableFrom(ic.Key)
select(IColumn) ic.Value).ToArray());
}
return(TableIndex.GetColumnsFromFields(f));
}
public static string GetIndexWhere(LambdaExpression lambda, IFieldFinder rootFiender)
{
IndexWhereExpressionVisitor visitor = new IndexWhereExpressionVisitor(rootFiender);
var newLambda = (LambdaExpression)ExpressionEvaluator.PartialEval(lambda);
visitor.Visit(newLambda.Body);
return(visitor.sb.ToString());
}
