python - Django 内联表单集不会这样做

Question

我正在使用 Django 创建卡路里记录网站。一个人创建一个账户，可以开始记录他在特定日期消耗和燃烧的卡路里量，然后显示他在那一天消耗或燃烧的卡路里是否更多。
用户可以存储他经常吃的食物和他经常做的运动，这样当他添加数据时他就可以使用该项目
使用给定的 midels 用户可以添加食物和练习。
食品型号:

class Food(models.Model):
    customer = models.ForeignKey(Customer, null=True, on_delete=models.CASCADE)
    food_name = models.CharField(max_length=50, null=True, blank=True)
    calories = models.IntegerField(null=True)
    food_pic = models.ImageField(default="default_food.jpg", null=True, blank=True)

def __str__(self):
    return f"{self.food_name}"

练习模型:

class Exercise(models.Model):
    customer = models.ForeignKey(Customer, null=True, on_delete=models.CASCADE)
    exercise_name = models.CharField(max_length=100, null=True, blank=True)
    calories = models.IntegerField(null=True)
    exercise_pic = models.ImageField(default="default_exercise.png", null=True, blank=True)

def __str__(self):
    return f"{self.exercise_name}"

我使用以下两个模型来存储有关特定日期的信息:
DailyFood 模型:

class DailyFood(models.Model):
    customer = models.ForeignKey(Customer, on_delete=models.CASCADE, null=True)
    food_name = models.ForeignKey(Food, on_delete=models.CASCADE, null=True)
    quantity = models.FloatField(null=True)
    date = models.DateField(auto_now_add=True, null=True)

def __str__(self):
     return f"{self.customer}, {self.date}"

日常锻炼模式:

class DailyExercise(models.Model):
    customer = models.ForeignKey(Customer, on_delete=models.CASCADE, null=True)
    exercise_name = models.ForeignKey(Exercise, on_delete=models.CASCADE, null=True)
    quantity = models.FloatField(null=True)  # number of hours done exercise
    date = models.DateField(auto_now_add=True, null=True)

def __str__(self):
     return f"{self.customer}, {self.date}"

在 views.py 文件中

def addData(request):
customer = request.user.customer
food_formset = inlineformset_factory(Customer, DailyFood, fields=('food_name', 'quantity', ))
exercise_formset = inlineformset_factory(Customer, DailyExercise, fields=('exercise_name', 'quantity', ))

f_formset = food_formset(instance=customer)
e_formset = exercise_formset(instance=customer)

if request.method == "POST":
    f_formset = food_formset(request.POST, instance=customer)
    e_formset = exercise_formset(request.POST, instance=customer)
    
    if f_formset.is_valid():
        mf_formset = f_formset.save(commit=False)
        mf_formset.customer = customer
        mf_formset.save()
    else:
        return HttpResponse("reached food_formset is not valid")

    if e_formset.is_valid():
        me_formset = e_formset.save(commit=False)
        me_formset.customer = customer
        me_formset.save()
        return redirect('/')
    else:
        return HttpResponse("reached exercise_formset is not valid")
else:
    foods = Food.objects.filter(customer=customer)
    exercises = Exercise.objects.filter(customer=customer)


    context = {'foods': foods, 'exercises': exercises, 'f_formset': f_formset, 'e_formset': e_formset}
    return render(request, 'cc/add-data.html', context)

AddData html(表单部分):

<form action="" method="POST">
      {% csrf_token %}
      <div class="foods">
          <p class="ad-accordion">Calories Consumed</p>
          <div class="ad-accordion-content">
            {% for form in f_formset %}
                {{form}}
                <br>
              {% endfor %}
          </div>
      </div>
      <div class="exercises">
        <p class="ad-accordion">Calories Burnt</p>
          <div class="ad-accordion-content">
              {% for form in e_formset %}
                {{form}}
                <br>
              {% endfor %}
          </div>
      </div>
      <p class="center-button">
          <button type="submit">Submit</button>
        </p>
    </form>

Q) When submitting the form, the form is invalid, when I print the f_formset and e_formset I get:

(Hidden field TOTAL_FORMS) This field is required.

(Hidden field INITIAL_FORMS) This field is required.

input type="hidden" name="dailyfood_set-TOTAL_FORMS" id="id_dailyfood_set-TOTAL_FORMS"
input type="hidden" name="dailyfood_set-INITIAL_FORMS" id="id_dailyfood_set-INITIAL_FORMS"
input type="hidden" name="dailyfood_set-MIN_NUM_FORMS" id="id_dailyfood_set-MIN_NUM_FORMS"
input type="hidden" name="dailyfood_set-MAX_NUM_FORMS" id="id_dailyfood_set-MAX_NUM_FORMS"

为什么这些值不存在，我在另一个项目中使用了 inlineformset 并且这些值由 django 自动填充，但由于某种原因它不会发生在一个项目中？

Answer 1

当您手动呈现表单集时，您需要包含带有标签 {{ your_formset.management_form }} 的 ManagementForm。表单集使用此表单来管理表单集中包含的表单集合。请参阅文档 here和 here .

<form action="" method="POST">
      {% csrf_token %}
      <div class="foods">
          <p class="ad-accordion">Calories Consumed</p>
          <div class="ad-accordion-content">
            {{ f_formset.management_form }}
            {% for form in f_formset %}
                {{form}}
                <br>
              {% endfor %}
          </div>
      </div>
      <div class="exercises">
        <p class="ad-accordion">Calories Burnt</p>
          <div class="ad-accordion-content">
              {{ e_formset.management_form }}
              {% for form in e_formset %}
                {{form}}
                <br>
              {% endfor %}
          </div>
      </div>
      <p class="center-button">
          <button type="submit">Submit</button>
        </p>
    </form>