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Django實現組合搜索

*args mdb itl con d+ ecc str inline index

一、實現方法

1.純模板語言實現

2.自定義simpletag實現(本質是簡化了純模板語言的判斷)

二、基本原理

原理都是通過django路由系統,匹配url篩選條件,將篩選條件作為數據庫查詢結果,返回給前端。

例如:路由系統中的url格式是這樣:

url(r^article-(?P<article_type_id>\d+)-(?P<category_id>\d+).html,views.filter)

其中article_type_id和category_id和數據庫中字段是相對應的,此時當一個url為article-1-2.html時候,後臺處理函數的參數將是一個字典{‘article_type_id‘: 1, ‘category_id‘: 1},然後將該條件作為數據庫查詢條件,最後得出結果返回給前端

三、代碼樣例

方法1:純模板語言實現

urls.py

#!/usr/bin/env python3
#_*_ coding:utf-8 _*_
#Author:wd
from django.conf.urls import url

from . import views
urlpatterns = [
    url(r^$,views.index),
    url(r^article-(?P<article_type_id>\d+)-(?P<category_id>\d+).html,views.filter),
]

models.py

from
django.db import models class Category(models.Model): caption=models.CharField(max_length=64) class Article_type(models.Model): caption=models.CharField(max_length=64) class Article(models.Model): title=models.CharField(max_length=64) content=models.CharField(max_length=256) category
=models.ForeignKey(to=Category) article_type=models.ForeignKey(to=Article_type

views.py

def filter(request,*args,**kwargs):
    if request.method=="GET":
        condition={}
        for k,v in kwargs.items():
                    kwargs[k]=int(v)  #模板if判斷row.id是數字,所以這裏需要轉換
                    if v=="0":#當條件為0代表所選的是全部,那麽就不必要加入到過濾條件中
                        pass
                    else:
                        condition[k]=int(v)
        aritcle=models.Article.objects.filter(**condition)
        aritcle_type=models.Article_type.objects.all()
        aritcle_category=models.Category.objects.all()
        return  render(request,search.html,{
            aritcle:aritcle,
            article_type:aritcle_type,
            article_category:aritcle_category,
            article_arg:kwargs,#將當前的篩選條件傳遞給html
        })

html模板

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .container a{
            display: inline-block;
            padding: 3px 5px;
            margin: 5px;
            border: 1px solid #dddddd ;
        }
        .active{
            background-color: rebeccapurple;

        }
    </style>
</head>
<body>
<h1>搜索條件</h1>
<div class="container">
    {% if article_arg.article_type_id == 0 %}
        <a class="active" href="/cmdb/article-0-{{ article_arg.category_id }}.html">全部</a>
    {% else %}
         <a  href="/cmdb/article-0-{{ article_arg.category_id }}.html">全部</a>
    {% endif %}
    {% for row in article_type %}
        {% if row.id == article_arg.article_type_id %}
            <a class="active" href="/cmdb/article-{{ row.id }}-{{ article_arg.category_id }}.html">{{ row.caption }}</a>
        {% else %}
            <a  href="/cmdb/article-{{ row.id }}-{{ article_arg.category_id }}.html">{{ row.caption }}</a>
        {% endif %}
    {% endfor %}
</div>
<div class="container">
     {% if article_arg.category_id == 0 %}
        <a class="active" href="/cmdb/article-{{ article_arg.article_type_id }}-0.html">全部</a>
    {% else %}
          <a  href="/cmdb/article-{{ article_arg.article_type_id }}-0.html">全部</a>
    {% endif %}
    {% for row in article_category %}
        {% if row.id == article_arg.category_id %}
        <a class="active" href="/cmdb/article-{{ article_arg.article_type_id }}-{{ row.id }}.html">{{ row.caption }}</a>
        {% else %}
        <a href="/cmdb/article-{{ article_arg.article_type_id }}-{{ row.id }}.html">{{ row.caption }}</a>
        {% endif %}
    {% endfor %}
</div>
<h1>查詢結果</h1>
<div>
    {% for row in aritcle %}
        <div>{{ row.id }}-{{ row.title }}</div>
    {% endfor %}
</div>
</body>
</html>

方法二:使用simpletag實現

Django實現組合搜索