code: def populate(publications):
  	
  
  	customlinks = CustomLink.objects.filter(publication__in=publications)
  	customfiles = CustomFile.objects.filter(publication__in=publications)
  
  	publications_ = {}
  	for publication in publications:
  		publication.links = []
  		publication.files = []
  		publications_[publication.id] = publication
  
  	for link in customlinks:
  		publications_[link.publication_id].links.append(link)
  	for file in customfiles:
  		publications_[file.publication_id].files.append(file)
docs: Load custom links and files from database and attach to publications.