Question

I have a function in views.py

    def get_interview_type(request):
        i = None
        title = request.GET['title'] #Here the title becomes different
        try:
            i = Interview.objects.get(title=title) #it looks for that dropdown value
            #Error according to pdb
            #-> i = Interview.objects.get(title=title)
            #    (Pdb) 
            #    DoesNotExist: DoesNotE...exist.',)

            if i.interview_type == "Time Series":
                visit_ids = i.visit_set.all()
                reference_visit_list = [] 
                for visit in visit_ids:
                    reference_visit_list.append(visit.reference_visit)
                reference_visit_list.extend(visit_ids)
                list(set(reference_visit_list))
                len_visits=filter(None,reference_visit_list)
                total_visits = len(len_visits)
                return render_to_response('export/get_details.html',
                                      {'visits':visit_ids,'count':visit_ids.count(),
                                       'total_visits':total_visits},
                                       context_instance=RequestContext(request)
                                      )
            else:
                return render_to_response('export/get_interview_type.html',
                                      {'visits':i.visit_set.all()},
                                       context_instance=RequestContext(request)
                                    )
        except Interview.DoesNotExist:
            pass

当用户从下拉列表中选择一个标题时，将调用此函数并执行该任务。现在我输入了一个包含'＆amp;'的字符串＆符号认为它可以像普通英语一样扮演'和'的角色： -

'CI-2-UGI＆amp;肠症状筛查＆amp;表征'（它是下拉值之一）现在当用户从下拉列表中选择此值时，标题不会保持不变，而是标题更改为CI-2-UGI（在title = request.GET ['title']中）并且在函数执行之前我收到500错误页面。这是错误在runserver模式下打印的内容

/home/user/cpms/careprep/tags/4.0/careprep/export/views.py（66）get_interview_type（） - ＆GT;无 - ＆GT;通过（Pdb）c [11 / Mar / 2012 22:05:20]“GET / export / get_interview_type /？title = CI-2-UGI％20＆amp;％20Bowel％20Symptom％20Screening％20＆amp;％20Characterization HTTP / 1.1”500 64490

此外，当我从标题中删除“＆amp;”＆符号时，没有500页。为什么这个＆amp;造成这个问题？我认为通过这种方式，每个特殊符号都会导致同样的问题。如果有人可以指导我以及如何解决这个问题，我将不胜感激

Answer 1

因为&用于分隔查询字符串中的字段。首先对URL进行编码。

Answer 2

I studied about URL-encode what Ignacio suggest but i found a clean and better solution.
Instead of comparing with title i used 'id' <option value="">  which is the primary key(id) for
Interview Table and modified the code like this:

def get_interview_type(request):
    i = None
    id = request.GET['id']
    try:
        i = Interview.objects.get(id=id)
        if i.interview_type == "Time Series":
            visit_ids = i.visit_set.all()
            reference_visit_list = [] 
            for visit in visit_ids:
                reference_visit_list.append(visit.reference_visit)
            reference_visit_list.extend(visit_ids)
            list(set(reference_visit_list))
            len_visits=filter(None,reference_visit_list)
            total_visits = len(len_visits)
            return render_to_response('export/get_details.html',
                                  {'visits':visit_ids,'count':visit_ids.count(),
                                   'total_visits':total_visits},
                                   context_instance=RequestContext(request)
                                  )
        else:
            return render_to_response('export/get_interview_type.html',
                                  {'visits':i.visit_set.all()},
                                   context_instance=RequestContext(request)
                                )
    except InterviewTitle.DoesNotExist:
        pass


and for picking the id i use jquery:-
$(function(){   
    $("#id_title").bind("change",function(){
        id = $(this).find("option[value="+ $(this).val()+"]").val();
        url = "../get_interview_type/?id="+id;
        $.get(url, "", function (d){
            $("#interview_dd").html(d);
        })
    });
});

为什么'＆amp;'将Django CharField（python字符串）分成几部分？

2 个答案: