jsf 2 - Primefaces: selecting rows from nested DataTables -


I am using Primefaces 3.4 and Groovy. I created the object part and the attachment : 

  square section {attachment selectedAttachment from the list & lt; Attachment & gt; Attachment = [] AttachmentDataModel getAttachmentModel ()} class attachment {string fileName string filetype string description} {new attachmentDataModel (return)}   
 My idea is to have DataTables like:  
  & lt; P: DataTable value = "# {mybean.parts}" var = "part" provided = "# {mybean.attachmentsFound}" & gt; & Lt; P: column & gt; & Lt; P: DataTable var = "attachment" selectionMode = "single" value = "# {part.attachmentModel}" selection = "# {part.selectedAttachment}" & gt; & Lt; P: column headerText = "file name" & gt; # {Attachment.fileName} & lt; / P: column & gt; & Lt; P: column headerText = "file description" style = "width: 200px" & gt; # {Attachment.description} & lt; / P: column & gt; & Lt; P: column headerText = "file type" style = "width: 20px" & gt; # {Attachment.fileType} & lt; / P: column & gt; & Lt; / P: DataTable & gt; & Lt; / P: column & gt; & Lt; / P: DataTable & gt;   
 I want to be able to select an attachment per part.  
  Issue:  Only  first  section  selected attachments  is set to the  last  selected attachment it happens!  
  Question:  How can I enable the example of each part to save my selected attachment? Thanks for your time  
  Note: .. If I debug my AttachmentDataModel, I'm seeing  getRowData  as many as I do for the hit    
 
 
 I'm still looking for an answer, but I've got an alternate solution.  
  & lt; P: I changed my mind to DataTable value = "# {mybean.parts}" var = "part" sung = "# {mybean.attachmentsFound}" & gt; & Lt; P: column & gt; & Lt; P: DataTable var = "attachment" selectionMode = "single" value = "# {part.attachmentModel}" selection = "# {part.selectedAttachment}" & gt; & Lt ;! - Carcond - & gt; & Lt; P: ajax event = "select row" listener = "# {mybean.onRowSelect}" /> & Lt; P: ajax event = "lineAniaSell" listener = "# {mybean.onRowUnselect}" /> & Lt ;! / / Carcond - & gt; & Lt; P: column headerText = "file name" & gt; # {Attachment.fileName} & lt; / P: column & gt; & Lt; P: column headerText = "file description" style = "width: 200px" & gt; # {Attachment.description} & lt; / P: column & gt; & Lt; P: column headerText = "file type" style = "width: 20px" & gt; # {Attachment.fileType} & lt; / P: column & gt; & Lt; / P: DataTable & gt; & Lt; / P: column & gt; & Lt; / P: DataTable & gt;   
 Then, in my backing bean (manager), I have implemented  onRowSelect / onRowUnselect  to add / remove my selections from a map. The attachment has an ID key and the attachment value is.

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