Freemarker Rendering

[Hans Liebenberg]

Hi,

public Result userDashboard(
        @PathParam("email") String email,
        @PathParam("id") Integer id,
        Context context) {

    Result result = Results.html();

    result.render("id", Integer.toString(id));
    result.render("email", email);

    return result;

}

I am battling to pass a POJO to my render() method. i.e in the example above it all works s expected, but if I have a POJO with name  and id members, and pass in

result.render("myPojo", thePojo);

Then from the freemarker  ftl I cannot acces myPojo.name or myPojo.id ...

I get a freemarker.core.InvalidReferenceException exception , but yet the name and id values are populated.

Thanks

[metacity (Mikko Oksa)]

Hi,

This might be completely anecdotal, but do you have bean style getters (getName(), getId()) for the pojo fields? Freemarker could be expecting them..

[Raphael André Bauer]

Without more code it is really hard to tell what is going wrong...
Cheers,

Raphael

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[Hans Liebenberg]

Hi

Thanks, Yes I do have getters

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[Hans Liebenberg]

Hi Raphael,

Here is my Java code:

public class ApplicationController {

    public Result index() throws Exception{

        Result result =  Results.html();

        result.render("tester", new Tester("xxxx", "yyy"));        
        result.render("simpleValue", "simple");

        return result;


    }

    static class Tester {
        String name;
        String code;

        public Tester(String name, String code) {
            this.name = name;
            this.code = code;
        }

        public String getName() {
            return name;
        }

        public String getCode() {
            return code;
        }
    }

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Then my FTL template

<p>
    ${tester.name}
</p>

>>>>> Error result
FreeMarker template error:
The following has evaluated to null or missing:
==> tester.name  [in template "views/ApplicationController/index.ftl.html" at line 9, column 46]

----
Tip: It's the step after the last dot that caused this error, not those before it.
----
Tip: If the failing expression is known to be legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing</#if>. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
----

----
FTL stack trace ("~" means nesting-related):
	- Failed at: ${tester.name} auto-escaped  [in template "views/ApplicationController/index.ftl.html" at line 9, column 44]
	~ Reached through: #nested  [in template "views/layout/homeLayout.ftl.html" in macro "myLayout" at line 49, column 9]
	~ Reached through: @layout.myLayout "Home page"  [in template "views/ApplicationController/index.ftl.html" at line 2, column 1]
----

>>>>>

However, if my template only specifies:

${simpleValue}

Then it works..

Thanks Alot!

Hans

[Raphael André Bauer]

Hey Hans,


what happens when you either call ${tester.getName} OR make variable
name public and call ${tester.name}.


Cheers,

Raphael

On Fri, Jan 22, 2016 at 10:56 AM, Hans Liebenberg

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[Hans Liebenberg]

Hi Raphael,

If I leave the getters, and make the name + code members public, and access in my template as tester.name, I get error:

FreeMarker template error:
An error has occurred when reading existing sub-variable "name"; see cause exception! The type of the containing value was: extended_hash+string (controllers.ApplicationController$Tester wrapped into f.e.b.StringModel)

and with a stack trace:

Caused by: java.lang.IllegalAccessException: Class freemarker.ext.beans.BeanModel can not access a member of class controllers.ApplicationController$Tester with modifiers "public"
	at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:109)

Then test 2:  Access the object in my template with tester.getName , with both cases of private vs public modifiers i get:

FreeMarker template error:
The following has evaluated to null or missing:
==> tester.getName  [in template "views/ApplicationController/index.ftl.html" at line 9, column 22]

using java version "1.7.0_71"

Will carry on playing

Thanks

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[Raphael André Bauer]

I guess if you make your Tester class public it should work...
Best,
Raphael

On Sun, Jan 24, 2016 at 7:36 AM, Hans Liebenberg

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[Hans Liebenberg]

Thanks Raphael !

I feel a little stupid!

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[Raphael André Bauer]

No... that just makes clear that the error messages generated by
Freemarker are not easy to get... No your fault..

Cheers,

Raphael

On Mon, Jan 25, 2016 at 7:05 AM, Hans Liebenberg

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[Joe Lauer]

Hans,

You may be interested in checking out Rocker templates -- the compiler would have caught your simple & common error.

https://github.com/fizzed/rocker

https://github.com/fizzed/ninja-rocker

-Joe

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