Templates: parentheses in expressions

ServiceStack #Script
1

I have written a following piece of code:

{{ 'xx' | assignTo: x }} {{ ('<h3>' + x + '</h3>') | raw | ifNotEmpty(x) }}

this does work when tested in the template evaluat on the http://templates.servicestack.net/docs/default-filters

but does not work when I’m trying it in my code (the unhandled expression is called).

using System;
using ServiceStack.Templates;
using System.Collections.Generic;

var context = new ServiceStack.Templates.TemplateContext(){
 OnUnhandledExpression = f =>
                {
                    throw new Exception("unknown binding " + f.BindingString);
                    return new byte[0];
                }          
}.Init();

var output = context.EvaluateTemplate("{{ 'xx' | assignTo: x }} {{  ('<h3>' + x + '</h3>') | raw | ifNotEmpty(x) }} ");

what is wrong? why does it behave different (properly, IMO) in the templates docs?

2

This is the new support added in v5.1.1 on MyGet. Basically ServiceStack Templates internals was rewritten to utilize a proper JS AST which now supports most JavaScript expressions (i.e. not statements or assignment expressions).

3

I see, thank you for the response.
Unfortunatelly I’m stuck with the previous version for now. How can I achieve such condition test within the old version?

4

The old version doesn’t support evaluating expressions so you need to use filters for any functionality, the string functions contains different examples of appending strings:

http://templates.servicestack.net/docs/default-filters#string-functions

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