python - Django - 以一种形式保存多个选择框

Question

我需要以一种形式保存多个选择，但它不会将值保存到我的模型中。表单如下所示:

这是我的 models.py

class ChoiceManager(models.Manager):
    def rates (self, Task_id, rating2, yo):
        assignment = Assignment.objects.get(id=Assignment_id)
        rating = rating2
        yo = FiscalYear.objects.get(fy_year=years)
        for i in range(len(rating2)):
            rated = Prog_capability.objects.create(
            task = task, 
            rating2 = rating[i],
            fy = yo[i]
        )

class NewYear(models.Model):
    year = models.CharField(max_length=5)
    new_year = models.CharField(max_length=5)

class Choice(models.Model):
    rating = models.CharField(max_length=255, blank=True, null=True)
    year = models.ForeignKey(NewYear, related_name="choices")
    assignment = models.ForeignKey(Assignment, related_name="choice")
    objects = ChoiceManager()

这是我的观点.py

def task_rating(request, Assignment_id):
    ratings = request.POST.getlist('rating2',[])
    years= request.POST.getlist('yo",[])
    rates= Choice.objects.rates(Assignment_id, ratings, years)
    return redirect ((reverse('Project:assignment_page', kwargs={'Assignment_id': Assignment_id})))

HTML

 <form action="{% url 'project:rating' %}" method="post">
      {% csrf_token %}
      {% for year in years %}
        <li class=cap_select>
          <div id=fyc>{{year.fy_year}}</div>
          <select name="rating2" id="{{assignment.id}}-{{year.id}}">
            <option>Choose From List</option>
            <option class=hi value="high">High</option>
            <option class=med value="medium">Medium</option>
            <option class=low value="low">Low</option>
            <option class=na value="n/a">N/A</option>
          </select> 
          <input type="hidden" name="yo" value={{year.fy_year}}>
        </li>  
      {% endfor %}
        <br>
        <input id=save_cap type="submit" value="Save">
      </form> 

我得到了

"NewYear matching query does not exist." and cannot save the data.

我已经研究这个问题好几天了。任何帮助将不胜感激。

Answer 1

是的，你说得对

POST data is not coming as dictionary.

您正在循环年份并渲染表单内的 select 和 input 标记以及所有 select 的 name 属性> 和 input 标签相同，即 rating 和 year 同时使用

在这种情况下，当您提交表单时，您将获得一个评级和年份列表，因此您应该使用getlist()方法，同时从 request.POST QueryDict 中获取它。

request.POST.getlist('rating[]')
request.POST.getlist('year[]')

如果上面不起作用，请使用它

request.POST.getlist('rating', [])
request.POST.getlist('year', [])

更新您的费率方法，例如。

class ChoiceManager(models.Manager):
    def rates (self, Assignment_id, rating, year):
        ...
        # you can use year also to find the length
        for i in range(len(rating)): 
           rated = Choice.create(
              assignment = assignment, 
              year = year[i],
              rating = rating[i]
           )

更改方法调用。

rates = Choice.objects.rates(Assignment_id,request.POST.getlist('rating[]'), request.POST.getlist('year[]'))