Question

I’m still learning Grails and seem to have hit a stumbling block.

Here are the 2 domain classes:

class Photo {     byte[] file       static belongsTo = Profile }   class Profile {     String fullName     Set photos      static hasMany = [photos:Photo]      } 

The relevant controller snippet:

class PhotoController {      def viewImage = {        def photo = Photo.get( params.id )       byte[] image = photo.file        response.outputStream << image      }  }  

Finally the GSP snippet:

<img class='Photo' src='${createLink(controller:'photo', action:'viewImage', id:'profileInstance.photos.get(1).id')}' /> 

Now how do I access the photo so that it will be shown on the GSP? I’m pretty sure that profileInstance.photos.get(1).id is not correct.

Answer 1

As it is a Set, if you want the first element, you will have to go:

profileInstance.photos.toArray()[0].id 

or

profileInstance.photos.iterator().next()