Django：将item.id列为字段attr？

In my template I have :

在我的模板中,我有:

{% for link in solution_list %}
 <form id="marked_solved_form{{link.id}}" action="" method="post">                                                                     
 {{mark_solved_form.is_solution}}                                                                                                      
 {% csrf_token %}                                                                                                                      
 <label for="id_is_solution{{link.id}}">test form</label>                                    
 <input type="hidden" name="next" value="{{ request.path }}"/>                                                                         
 </form>                                 
 {% endfor %}
{% for l