Open-Harbor/dotnet-dynamic-linq
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just realized that not all ternaries will have the same final result.

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This commit is contained in:
David Lebee 2018-04-02 14:37:49 -05:00
parent cffc978a6a
commit f3893fc3d6
1 changed files with 21 additions and 9 deletions
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30
PoweredSoft.DynamicLinq.ConsoleApp/BetterProto2.cs
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@ -46,7 +46,14 @@ namespace PoweredSoft.DynamicLinq.ConsoleApp
public static void Case2() public static void Case2()
{ {
// the expression parser. // the expression parser.
var ep = new ExpressionParser(typeof(Post), "Author.Posts.Author.Posts.Comments.Id"); var ep = new ExpressionParser(typeof(Post), "Author.Posts.Author.FirstName");
/*
var esl = new List<string>();
new List<Post>().AsQueryable().Select(t => new
{
FirstNames = (t.Author == null ? esl : (t.Author.Posts == null ? esl : t.Author.Posts.Select(t2 => t2.Author == null ? string.Empty : t2.Author.FirstName)))
});*/
// the builder. // the builder.
var per = new PathExpressionResolver(ep); var per = new PathExpressionResolver(ep);
@ -92,7 +99,10 @@ namespace PoweredSoft.DynamicLinq.ConsoleApp
// reverse foreach // reverse foreach
Parser.Pieces.ReversedForEach((piece, index) => Parser.Pieces.ReversedForEach((piece, index) =>
{ {
if (piece.Parent != null && piece.Parent.IsGenericEnumerable) if (piece.Parent == null)
return;
if (piece.Parent.IsGenericEnumerable)
HandleCollection(piece, index); HandleCollection(piece, index);
}); });
} }
@ -101,22 +111,24 @@ namespace PoweredSoft.DynamicLinq.ConsoleApp
{ {
if (NullChecking == SelectNullHandling.LeaveAsIs) if (NullChecking == SelectNullHandling.LeaveAsIs)
return; return;
Type nullableType = null; // last piece.
var lastPiece = Parser.Pieces.Last(); var lastPiece = Parser.Pieces.Last();
// the subject type
Type subjectType = null;
if (lastPiece.IsGenericEnumerable) if (lastPiece.IsGenericEnumerable)
nullableType = typeof(List<>).MakeGenericType(lastPiece.EnumerableType); subjectType = typeof(List<>).MakeGenericType(lastPiece.EnumerableType);
if (NullChecking == SelectNullHandling.Default) if (NullChecking == SelectNullHandling.Default)
NullCheckValueExpression = Expression.Default(nullableType); NullCheckValueExpression = Expression.Default(subjectType);
else else
NullCheckValueExpression = Expression.New(nullableType); NullCheckValueExpression = Expression.New(subjectType);
} }
private void HandleCollection(ExpressionParserPiece piece, int index) private void HandleCollection(ExpressionParserPiece piece, int index)
{ {
Parser.Pieces.
/* /*
if (Result == null) if (Result == null)