示例#1
0
        public static bool Enter(
            FilterOperationField field,
            ObjectFieldNode node,
            IQueryableFilterVisitorContext context,
            [NotNullWhen(true)] out ISyntaxVisitorAction?action)
        {
            if (field.Operation.Kind == FilterOperationKind.ArraySome ||
                field.Operation.Kind == FilterOperationKind.ArrayNone ||
                field.Operation.Kind == FilterOperationKind.ArrayAll)
            {
                if (!field.Operation.IsNullable && node.Value.IsNull())
                {
                    context.ReportError(
                        ErrorHelper.CreateNonNullError(field, node, context));

                    action = SyntaxVisitor.Skip;
                    return(true);
                }

                MemberExpression nestedProperty = Expression.Property(
                    context.GetInstance(),
                    field.Operation.Property);

                context.PushInstance(nestedProperty);

                Type closureType = GetTypeFor(field.Operation);

                if (node.Value.IsNull())
                {
                    context.AddIsNullClosure(closureType);
                    action = SyntaxVisitor.SkipAndLeave;
                }
                else
                {
                    context.AddClosure(closureType);
                    action = SyntaxVisitor.Continue;
                }
                return(true);
            }
            action = null;
            return(false);
        }