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HomeBackend DevelopmentPython Tutorialpython django multi-level business tree structure planning and page rendering

项目说明

  设计一个 业务 树形结构规划,多层灵活型结构,

  从 建表设计 到  浏览器前端展示 整体的结构规划

  使用 python django web框架;和一个js 树形结构插件treeview(插件说明 http://www.cnblogs.com/jyh317/p/3763564.html)

表设计

  使用django models 设计表, 字段如下,新增业务时,在 upper_business 字段填上该业务的直属上级业务 ID 号(此id号为该表中已经存在的业务id号),若新增业务为最上级业务 upper_business 为空。

#工作业务
class Business_detail(models.Model):
    upper_business = models.IntegerField(blank=True, null=True, verbose_name=u'上级业务')
    name = models.CharField(max_length=100, unique=True, verbose_name=u'业务名称')
    info = models.TextField(max_length=200, null=True, blank=True, verbose_name=u'业务说明')
    domain = models.CharField(max_length=50, null=True, blank=True, verbose_name=u'域名')
    monitor_url = models.CharField(max_length=50, null=True, blank=True, verbose_name=u'监控页面')
    comment = models.CharField(max_length=100, blank=True, null=True, verbose_name=u'备注')

在 django admin 后台添加新业务如图;可自行设计自己的前端新增业务页面,约束字段(如上级业务必须填写已存在id)

python django multi-level business tree structure planning and page rendering

python django multi-level business tree structure planning and page rendering

########  开始前端展示 #########

视图函数

   在django views 中添加业务展示视图,使用django 特色models 查询出第一级业务(第一级业务唯一)传递到模板层

 def businessBasic(request):
    businessObj = Business_detail.objects.all()
     firster = businessObj.get(id=1)     #得到第一级业务
     return render_to_response('eams/businessBasic.html', locals())

前端模板

  浏览此下之前,需要对js 树形结构插件treeview 的使用有所了解

  先载入treeview js文件

<link href="/static/treeview/jquery.treeview.css" rel="stylesheet" type="text/css" />
 <script type="text/javascript" src="/static/treeview/lib/jquery.cookie.js"></script>
     <script type="text/javascript" src="/static/treeview/jquery.treeview.js"></script>

业务树div 主体设计

{% load eamsfilter %}    <!-- 载入自定义模板过滤器 -->
        <div style="width: 30%; border-right: 1px solid #D8D8D8; min-height: 300px; overflow: auto; float: left">
            <ul id="tree" class="filetree">
                <li><span id="business_{{ firster.id }}" class="folder">{{ firster.name }}</span>
                    {% if firster.id|getNextBusiness %}  <!-- 使用模板过滤器,判断得到直属下级业务列表,过滤器代码在楼下 -->
                        <ul>
                        {% for node in firster.id|getNextBusiness %} <!-- 遍历下级业务节点 -->
                            {% include "eams/businessNode.html" %}  <!-- 引用业务节点 li 模板,(此处核心设计)楼下单独解释 -->
                        {% endfor %}
                        </ul>
                    {% endif %}
                </li>
            </ul>
            <script type="text/javascript">
            $("#tree").treeview();
            </script>
        </div>

模板过滤器(eamsfilter.py)代码, 此处不做更多解释

#-*-coding:utf-8-*-
__author__ = &#39;zhouwang&#39;
from eams_apps.models import *
from django import template
register = template.Library()
@register.filter(name=&#39;getNextBusiness&#39;)
def getNextBusiness(value):
    return Business_detail.objects.filter(upper_business = value)

节点模板(核心)eams/businessNode.html,当父级业务判断有下级业务时,引入此模板,提出节点代码为单独的html文件,方便复用及模板层的迭代,模板迭代的设计,实现业务节点多层(未知层数)结构展示

{% load eamsfilter %}  <!-- 载入过滤器 -->
<li><span id="business_{{ node.id }}" class="folder">{{ node.name }}</span>  <!-- 渲染当前遍历的节点 -->
    {% if node.id|getNextBusiness %}  <!-- 通过过滤器, 判断得到当前业务节点是否有下级业务-->
        <ul>
        {% for node in node.id|getNextBusiness %}  <!-- 遍历当前业务节点的下级业务节点 -->
            {% include "eams/businessNode.html" %}  <!-- 再次引入自身页面、判断节点、遍历节点等等, 实现深层迭代得到多级业务节点 -->
        {% endfor %}
        </ul>
    {% endif %}
</li>

前端效果

python django multi-level business tree structure planning and page rendering

  模板代码预留了业务节点 id 号,前端点击触发业务节点,ajax 请求节点业务信息及页面展示获取的节点信息, 不再继续阐述。。。


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