[jira] [Created] (FREEMARKER-178) Using map or filter built-ins looses custom template model

["Steven Davelaar (Jira)" <ji...@apache.org>]

Steven Davelaar created FREEMARKER-178:
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             Summary: Using map or filter built-ins looses custom template model
                 Key: FREEMARKER-178
                 URL: https://issues.apache.org/jira/browse/FREEMARKER-178
             Project: Apache Freemarker
          Issue Type: Bug
          Components: engine
    Affects Versions: 2.3.30
            Reporter: Steven Davelaar


When you are using a custom template sequence model that implements the 

TemplateModelWithAPISupport interface so you can use the api built-in, you can no longer use the api built-in once you have applied the map or filter function, because the map and api functions then return a new instance of TemplateModelListSequence, which does not implement the TemplateModelWithAPISupport interface.

For example, imagine a custom sequence model that supports the toString() method, then the following works fine:
{noformat}
${myList?api.toString()}{noformat}
However, when I apply a filter, like this:
{noformat}
${myList?filter(i -> i.name == 'foo')?api.toString()}{noformat}
I get a APINotSupportedTemplateException because the filter has returned a TemplateModelListSequence instance.

 

 



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