constructor-test

This is mostly a blank project from create-app. The only files that really matter are

• PersonController: Calls the pageRenderer and also render in its one action.
• test.gsp: Calls the tablig
• TestTagLib: Calls the service
• PersonService: Creates two objects, one via map constructor and one via blank constructor + fields.

Basically this shows that:

• Setting named fields in a constructor through a GroovyPageRenderer silently fails
• Setting specific fields on a constructed object through a GroovyPageRenderer succeeds
• Both succeed when following a more "normal" path of a "render" call

Note that the taglib is not actually necessary; the same thing happens if the service is called directly from the GSP.

Stackoverflow issue with discussion, some backstory, etc. is available here: https://stackoverflow.com/questions/68446060/named-map-constructors-do-not-work-in-grails-gsp-pagerenderer?noredirect=1#comment120991465_68446060

output

Web page output is not important in this demo application. The console output of running this is

--------------------------
Called from pageRenderer
Created null
Created Bob
pageRenderer complete
--------------------------
--------------------------
Called from normal
Created Alice
Created Bob
normal complete
--------------------------