尝试构造时，子节点被视为大子节点

Question

我正在为该类别使用 django-mptt 库。我可以在模板中显示类别列表，但我想适当地缩进它，以便用户可以知道哪个是主要类别，哪个是子类别等等。我尝试构建的方式是

{% recursetree nodes %}
  <li class="node">
    <a href="/category/{{ node.get_absolute_url }}"
      class="{% if not node.is_leaf_node and not node.is_root_node and node.is_child_node %} child_parent {% elif node.is_leaf_node and not node.is_root_node %}leaf_node{% endif %}">
      {{ node.name }}
      {% if node.is_root_node %}
        <span class="badge">{{ node.get_count_children }}</span>
      {% endif %}
    </a>
      {% if not node.is_leaf_node %}
          <ul class="children">
            <li>{{ children }}</li>
          </ul>
      {% endif %}
  </li>
{% endrecursetree %}

这会产生以下类别设计

Here Dressing Table 是 Bed 和 Almirah 等 Bedroom Items 的子项，而不是 Bed 的子项。我该如何解决这个问题？我知道问题出在这里

<a href="/category/{{ node.get_absolute_url }}"
class="{% if not node.is_leaf_node and not node.is_root_node and node.is_child_node %} child_parent {% elif node.is_leaf_node and not node.is_root_node %}leaf_node{% endif %}">

但无法解决此问题

不是截图中的敷料table

Answer 1

根据您更新的答案。
Dinning Set, Kitchen Rack, and Kitchen Setup(Modular Kitchen) 应该是 cyan 因为他们是二级。如果我的理解是正确的话。
这是我的黑客解决方案。如果有人找到更好的，请提出。

向 Model 实例添加额外的方法
我必须将 nodes 添加到 context。（如果你像我一样使用 Django2.0，这将是可选的）
使用模板中的实例方法

models.py

from django.db import models
from mptt.models import MPTTModel, TreeForeignKey


class Genre(MPTTModel):
    name = models.CharField(max_length=50, unique=True)
    parent = TreeForeignKey('self', null=True, blank=True, related_name='children', db_index=True,
                            on_delete=models.CASCADE)

    class MPTTMeta:
        order_insertion_by = ['name']

    def __str__(self):
        return f'{self.name}'

    def is_second_node(self):
        return True if (self.get_ancestors().count() == 1) else False

views.py

from django.views.generic import ListView

from genres.models import Genre


class GenreListView(ListView):
    model = Genre
    template_name = 'genre_list.html'

    def get_context_data(self, *, object_list=None, **kwargs):
        """Get the context for this view."""
        queryset = object_list if object_list is not None else self.object_list
        page_size = self.get_paginate_by(queryset)
        context_object_name = self.get_context_object_name(queryset)
        if page_size:
            paginator, page, queryset, is_paginated = self.paginate_queryset(queryset, page_size)
            context = {
                'paginator': paginator,
                'page_obj': page,
                'is_paginated': is_paginated,
                'object_list': queryset
            }
        else:
            context = {
                'paginator': None,
                'page_obj': None,
                'is_paginated': False,
                'object_list': queryset
            }
        if context_object_name is not None:
            context[context_object_name] = queryset
        context.update(kwargs)
        context['nodes'] = context.get('object_list')
        return super().get_context_data(**context)

genre_list.html

<!DOCTYPE html>
{% load mptt_tags %}
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Genre ListView</title>
</head>
<style>
    .root {color: purple}
    .child{color: cyan}
    .leaf {color: gray}
</style>
<body>
    {% recursetree nodes %}
    <div class="
        {% if node.is_root_node %}
        root
        {% elif node.is_child_node and not node.is_leaf_node or node.is_second_node%}
        child
        {% elif node.is_leaf_node and not node.is_root_node%}
        leaf
        {%endif%}">
        {{node.name}}
        {{node.is_second_node}}
    </div>
    {% if not node.is_leaf_node%}
    <ul>{{children}}</ul>
    {% endif %}

    {% endrecursetree %}
</ul>
</body>
</html>

尝试构造时，子节点被视为大子节点

child node is treated as grand child node when trying to structure

python

django

django-templates

django-views

django-mptt