python - Bootstrap Accordion 与 Django : How to only load the data for the open accordion section?

Question

我正在尝试制作一个网页，它将以 Bootstrap Accordion 的格式显示食谱，就像这样 ( see here )。这就是我现在的做法:

<div class="panel-group" id="accordion">
    {% for recipe in recipes %}
    <div class="panel panel-default">
        <div class="panel-heading">
            <h4 class="panel-title">
                <a data-toggle="collapse" data-parent="#accordion" href="#collapse{{ forloop.counter }}">
                    {{ recipe }}
                </a>
            </h4>
        </div>
        <div id="collapse{{ forloop.counter }}" class="panel-collapse collapse">
            <div class="panel-body">
                <table class="table table-hover">
                    {% for ingredient in  foodtype|ingredients_in_recipe:recipe %}
                        <tr>
                            <td>
                                {{ ingredient.ingredient_name }}
                            </td>
                            <td>
                                {{ ingredient.ingredient_quantity }}
                            </td>
                        </tr>
                    {% endfor %}
                    <p>{{ recipe.details }}</p>
                </table>
            </div>
        </div>
    </div>
    {% endfor %}
</div>

我为此做了一个自定义模板标签:

@register.filter
def ingredients_in_recipe(foodtype, recipe):
    return foodtype.ingredient_set.filter(recipe=recipe).order_by("ingredient_name")

问题是我有 200 多个食谱，加载所有这些数据的速度太慢了。理想情况下，模板标签函数 ingredients_in_recipe 应该只在用户点击食谱时被调用。然而，据我所知，这是不可能的，因为 Django 运行它，然后将呈现的 HTML 发送给用户。

有没有办法绕过这个问题，同时仍然保持图片中的 Accordion 风格？

提前致谢，最大

编辑:这也是我的观点

def detail(request, foodtype_id):
     foodtype = get_object_or_404(foodtype, id=foodtype_id)
     recipe = foodtype.recipe_set.values_list('recipe').order_by('recipe').distinct()
     context = {
         'foodtype': foodtype,
         'recipe': recipe,
     }
     return render(request, 'main/detail.html', context)

Answer 1

总是最好在到达模板之前执行该逻辑。如果您设置成分的顺序，那么您就不必在模板中订购它们会怎么样？这是否有效并提高了性能？

class Ingredient(models.Model):
  ...

  class Meta:
    ordering = ['ingredient_name']


<div class="panel-group" id="accordion">
    {% for recipe in recipes %}
    <div class="panel panel-default">
        <div class="panel-heading">
            <h4 class="panel-title">
                <a data-toggle="collapse" data-parent="#accordion" href="#collapse{{ forloop.counter }}">
                    {{ recipe }}
                </a>
            </h4>
        </div>
        <div id="collapse{{ forloop.counter }}" class="panel-collapse collapse">
            <div class="panel-body">
                <table class="table table-hover">
                    {% for ingredient in recipe.ingredient_set.all %}
                        <tr>
                            <td>
                                {{ ingredient.ingredient_name }}
                            </td>
                            <td>
                                {{ ingredient.ingredient_quantity }}
                            </td>
                        </tr>
                    {% endfor %}
                    <p>{{ recipe.details }}</p>
                </table>
            </div>
        </div>
    </div>
    {% endfor %}
</div>