使用Django实现web表单中的树形视图结构

$ django-admin startproject myproject
$ cd myproject
$ python manage.py startapp myapp

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

class TreeNode(MPTTModel):
    name = models.CharField(max_length=100)
    parent = TreeForeignKey('self', on_delete=models.CASCADE, null=True, blank=True, related_name='children')

    class MPTTMeta:
        order_insertion_by = ['name']

    def __str__(self):
        return self.name

$ python manage.py makemigrations
$ python manage.py migrate

from django import forms
from mptt.forms import TreeNodeChoiceField
from .models import TreeNode

class TreeForm(forms.Form):
    name = forms.CharField(max_length=100)
    parent = TreeNodeChoiceField(queryset=TreeNode.objects.all())

from django.shortcuts import render
from .forms import TreeForm

def tree_view(request):
    if request.method == 'POST':
        form = TreeForm(request.POST)
        if form.is_valid():
            form.save()
    else:
        form = TreeForm()
    
    return render(request, 'tree.html', {'form': form})

<form method="post">
  {% csrf_token %}
  {{ form.as_p }}
  <button type="submit">保存</button>
</form>

from django.urls import path
from myapp.views import tree_view

urlpatterns = [
    path('tree/', tree_view, name='tree_view'),
]