Make relationship between articles from different container

11

You probably have to test the value of the TV, instead of the result from pdoResources.

Something like this:

[[+tv.assign_artist:!empty=`
    <li>
        Artist: 
        <span>
            [[pdoResources?
                &tpl=`@CODE:<a href="{{~{{+id}}}}">{{+pagetitle}}</a>`
                &resources=`[[+tv.assign_artist:replace=`||==,`]]`
                &parents=`0`
                &outputSeparator=`, `
            ]]
        </span>
    </li>
`]]

(No need to call pdoResources uncached here!)