如何在grails GSP中显示图像？ [英] How to display image in grails GSP?

问题描述

以下是2个域的类：

  class Photo {
 byte [] file 
 
 static belongsTo = Profile 
} 
 
 
 class档案{
字符串全名
设置照片
 
 static hasMany = [照片：照片] 
} 
  

相关控制器代码片段：

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

片段：

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

现在我该如何访问照片，以便它能显示在GSP上？我很确定
profileInstance.photos.get（1）.id 是不正确的。

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

或

  profileInstance.photos.iterator（）。next（）
  

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.

解决方案

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()

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