The ez_urlalias twig function accepts a Location (Id) as its argument. This makes it difficult and tedious to preview content, since previewed content can be unpublished, and have no Location yet.

This can be avoided by making the function more flexible. It should accept as an argument:

• a Content OR a ContentInfo, in which case it generates the alias to the main Location, if there is one
• a Location
• a Location ID

Content, ContentInfo and Location should be preferred and highlighted in dev documentation. But this makes the developer responsible for passing sane arguments, and we can handle the missing main location within the router.