Django模型表单设置了外键下拉的可能值

  • Z时代
  • 2024-01-10
  • 分类：问答

我有一个表格ReviewForm，它扩展ModelForm。 ReviewForm的模型是Review，它具有以下字段：Django模型表单设置了外键下拉的可能值

class Review(models.Model): 
    message = models.TextField(max_length = 4000) 
    created_at = models.DateTimeField(auto_now_add = True) 
    updated_at = models.DateTimeField(null = True) 
    rating = models.IntegerField(
     default = 5, 
     validators = [MaxValueValidator(5), MinValueValidator(0)] 
    ) 
    prof = models.ForeignKey(Prof, related_name = 'reviews') 
    course = models.ForeignKey(Course, related_name = 'reviews') 
    user = models.ForeignKey(User, related_name = 'reviews')

和forms.py

class ReviewForm(ModelForm): 
    rating = CharField(widget=TextInput(attrs={'type': 'number','value': 5, 'min': 0, 'max': 5})) 
    class Meta: 
     model = Review 
     fields = ['message', 'rating', 'prof', 'course', 'user']

我试图渲染它之前的初始值传递到表单。这是我对views.py

def review(request, prof_id=None): 
    """ Review a prof """ 
    # If there's an input prof, return review page for that prof 
    if prof_id: 
     user = User.objects.get(pk=request.user.id) 
     prof = prof_views.prof(prof_id) 
     course = prof.course_set.all() 
     data = {'user': user, 'prof': prof, 'course': course} 
     review_form = ReviewForm(initial=data) 
     return render(request, 'reviews/review_form.html', {'review_form': review_form}) 
    review_form = ReviewForm() 
    return render(request, 'reviews/review_form.html', {'review_form': review_form})

prof和user成功设置的初始值的代码。我试图传入prof的courses，并以表单显示queryset。但是，Django似乎并不接受它。

我不知道如何编码此功能。设置prof和user的初始值可以工作，因为它选择初始值。我确信获得教授课程的代码：course = prof.course_set.all()正常工作，我已经在shell中测试过它。所以我需要做的是根据queryset输入设置表格的课程的值可能的值。

回答：

感谢@solarissmoke的链接！我将它固定为：

def review(request, prof_id=None): 
    """ Review a prof """ 
    # If there's an input prof, return review page for that prof 
    if prof_id: 
     user = User.objects.get(pk=request.user.id) 
     prof = prof_views.prof(prof_id) 
     course = prof.course_set.all() 
     data = {'user': user, 'prof': prof} 
     review_form = ReviewForm(initial=data) 
     review_form.fields['course'].queryset = course # Added this line

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