Render Partial Collection

[Nanang Suryadi]

Hi There,

Please help me,

<div class="card-list">

       <@render partial="/pages/card_app_produk" collection=products/>

</div>

public void index() {

        String[] produk = {"camelot.jpg", "moderncombat.jpg", "robot.jpg",

                "tesla.png", "letsmego.jpg"};

        view("product", produk);

        view("appl","polier");

        view("clusterTitle", "Kesehatan & ibu janin");

}

I cannot parse list variable products in template

[Igor Polevoy]

Can you please post error and exception stack trace? 

[Igor Polevoy]

and also, source of the partial?

[Nanang Suryadi]

org.javalite.activeweb.ViewException: Failed to render template: '/system/error.ftl', with layout: '/layouts/default_layout'; Expression stack_trace is undefined on line 16, column 3 in system/error.ftl.
    at org.javalite.activeweb.freemarker.FreeMarkerTemplateManager.merge(FreeMarkerTemplateManager.java:123)
    at org.javalite.activeweb.RenderTemplateResponse.doProcess(RenderTemplateResponse.java:82)
    at org.javalite.activeweb.ControllerResponse.process(ControllerResponse.java:64)
    at org.javalite.activeweb.ControllerRunner.renderResponse(ControllerRunner.java:134)
    at org.javalite.activeweb.ControllerRunner.run(ControllerRunner.java:80)
    at org.javalite.activeweb.RequestDispatcher.doFilter(RequestDispatcher.java:192)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:744)
Caused by: freemarker.core.InvalidReferenceException: Expression stack_trace is undefined on line 16, column 3 in system/error.ftl.
    at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:125)
    at freemarker.core.Expression.getStringValue(Expression.java:118)
    at freemarker.core.Expression.getStringValue(Expression.java:93)
    at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
    at freemarker.core.Environment.visit(Environment.java:221)
    at freemarker.core.MixedContent.accept(MixedContent.java:92)
    at freemarker.core.Environment.visit(Environment.java:221)
    at freemarker.core.Environment.process(Environment.java:199)
    at freemarker.template.Template.process(Template.java:259)
    at org.javalite.activeweb.freemarker.FreeMarkerTemplateManager.merge(FreeMarkerTemplateManager.java:98)
    ... 21 more

please what should i do??

thanks, igor

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Nanang Suryadi
BB.3278B031
T.08815015640

[Igor Polevoy]

The variable name inside  your partial is not correct. If you iterate a collection inside a partial, then ,you can access a variable from collection using the same name as partial itself

For instance, you call a partial "_carr_app_produk.ftl" like  this: 

 <@render partial="/pages/card_app_produk" collection=products/>

Then you have this code inside the partial:

<img class="cover-image" src="asset/img/${product}"/>

What you need to do is: 

<img class="cover-image" src="asset/img/${carr_app_produk}"/>

Please, read the doc: http://code.google.com/p/activeweb/wiki/Views#Partials_naming_and_location

However, the exception is not what I'd expect, and I will look into that 

thanks,

[Nanang Suryadi]

oke thank igor, 
the partial template can render now :-)

[Mattias coudron]

Hi Igor,

Can i use this to iterate over a collection of objects that have multiple member fields?

Thanks.

[Igor Polevoy]

Yes, this is totally possible. You can go after members their members, their members, etc. Please have a look at this example: https://github.com/javalite/activeweb-rest
While this is a Web service, the same logic applies to HTML

Tx