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imagegrailsgroovy

How to display image in grails GSP?

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.

Solution

  • 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()