python django 數據庫樹形菜單的設計

# view文件
from django.shortcuts import render
from app.models import Menu
# Create your views here.

from django.http import JsonResponse

def index(request):
    
    data = get_menu_tree()
    return JsonResponse({"list":data})

# 從數據庫獲取菜單樹
def get_menu_tree():
    tree = []
    menus = Menu.objects.filter(parent=None)
    for menu in menus:
        menu_data = {
            "label":menu.name,
            "children":[]
        }
        childs = Menu.objects.filter(parent=menu)
        if childs:
            menu_data["children"] = get_child_menu(childs)
        tree.append(menu_data)
    return tree

# 遞歸獲取所有的子菜單
def get_child_menu(childs):
    children = []
    if childs:
        for child in childs:
            data = {
                "label":child.name,
                "children":[]
            }
            _childs = Menu.objects.filter(parent=child)
            if _childs:
               data["children"].append(get_child_menu(_childs))
            children.append(data)
    return children

# models.py
from django.db import models
 
class User(models.Model):
    username = models.CharField(max_length=16) #創建一個字段，類型為字符串類型，最大長度為16 
    password = models.CharField(max_length=32) #創建一個字段，類型為字符串類型，最大長度為32

    def __unicode__(self):
        return self.username

class Menu(models.Model):
    name = models.CharField(max_length=64, verbose_name="菜單名稱") # 菜單名稱
    fullName = models.CharField(max_length=512, null=True, blank=True) # 菜單全稱
    path = models.CharField(max_length=64, null=True, blank=True) # 映射數據路徑
    parent = models.ForeignKey("Menu", on_delete=models.DO_NOTHING, null=True, blank=True) # 父節點
    datum = models.CharField(max_length=64, null=True, blank=True) # 參考基准
    type = models.CharField(max_length=64, null=True, blank=True) # 菜單類型
    remark = models.CharField(max_length=64, null=True, blank=True) # 備注

    def __unicode__(self):
        return self.name
    def __str__(self):
        return self.name
    class Meta():
        verbose_name = "菜單"
        verbose_name_plural = verbose_name