Django实现组合搜索

1.纯模板语言实现

2.自定义simpletag实现（本质是简化了纯模板语言的判断）

原理都是通过django路由系统，匹配url筛选条件，将筛选条件作为数据库查询结果，返回给前端。

例如：路由系统中的url格式是这样：

url(r\d+)-(?P\d+).html,views.filter)

其中article_type_id和category_id和数据库中字段是相对应的，此时当一个url为article-1-2.html时候，后台处理函数的参数将是一个字典{'article_type_id': 1,'category_id': 1}，然后将该条件作为数据库查询条件，最后得出结果返回给前端

方法1：纯模板语言实现

urls.py

django.conf.urls from . import views
urlpatterns = [
url(r'^$',views.index),url(r'^article-(?P\d+)-(?P\d+).html',views.filter),]

models.py

django.db 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

filter(request,*args,** request.method=== k,v =int(v) v==: ==models.Article.objects.filter(**== render(request,:kwargs, })

html模板

Title

    <span style="background-color: #f5f5f5; color: #000000;"&gt;}</span>
<span style="color: #0000ff;"&gt;</</span><span style="color: #800000;"&gt;style</span><span style="color: #0000ff;"&gt;></span>

</head>
<body>
<h1>搜索条件</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>查询结果</h1>
<div>
{% for row in aritcle %}
<div>{{ row.id }}-{{ row.title }}</div>
{% endfor %}
</div>
</body>
</html>

方法二：使用simpletag实现

定义simpletag，参考博客

myfilter.py

django django.utils.safestring register=template.Library()
@register.simple_tag
def filter_all(article_arg,condition):
'''
处理条件为全部
:param article_arg: 当前url字典：如{'article_type_id': 1,'category_id': 1}
:param condition: 要处理的条件，如article_type_id，用于区分当前处理选择了那个全部
:return: 返回下面页面形式
{% if article_arg.article_type_id == 0 %}
<a class="active" href="/cmdb/article-0-{{ article_arg.category_id }}.html">全部
{% else %}
<a href="/cmdb/article-0-{{ article_arg.category_id }}.html">全部
{% 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 }}
{% else %}
<a href="/cmdb/article-{{ row.id }}-{{ article_arg.category_id }}.html">{{ row.caption }}
{% endif %}
{% endfor %}
'''
if condition=='article_type_id':
if article_arg[condition]==0:
print(article_arg['category_id'])
res= '<a class ="active" href="/cmdb/article-0-%s.html">全部' % article_arg['category_id']
else:
res = '<a href="/cmdb/article-0-%s.html">全部' % article_arg['category_id']
return mark_safe(res)
elif condition=='category_id':
if article_arg['category_id']==0:
res = '<a class ="active" href="/cmdb/article-%s-0.html">全部' % article_arg['article_type_id']
else:
res = '<a href="/cmdb/article-%s-0.html">全部' % article_arg['article_type_id']
return mark_safe(res)

@register.simple_tag
def filter_type(article_type,article_arg):
'''
:param article_type: article_type对象
:param article_arg: 当前url字典
:return:
{% 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 }}
{% else %}
<a href="/cmdb/article-{{ row.id }}-{{ article_arg.category_id }}.html">{{ row.caption }}
{% endif %}
{% endfor %}
'''
res=[]
for row in article_type:
if row.id== article_arg['article_type_id']:
temp='<a class="active" href="/cmdb/article-%s-%s.html">%s' %(row.id,article_arg['category_id'],row.caption)
else:
temp = '<a href="/cmdb/article-%s-%s.html">%s' % (row.id,row.caption)
res.append(temp)
return mark_safe("".join(res))

@register.simple_tag
def filter_category(article_category,article_arg):
'''
:param article_type: article_category对象
:param article_arg: 当前url字典
:return:
{% 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 }}
{% else %}
<a href="/cmdb/article-{{ article_arg.article_type_id }}-{{ row.id }}.html">{{ row.caption }}
{% endif %}
{% endfor %}
'''
res=[]
for row in article_category:
if row.id== article_arg['category_id']:
temp='<a class="active" href="/cmdb/article-%s-%s.html">%s' %(article_arg['article_type_id'],row.id,row.caption)
else:
temp = '<a href="/cmdb/article-%s-%s.html">%s' % (article_arg['article_type_id'],row.caption)
res.append(temp)
return mark_safe("".join(res))

html模板

Title

    <span style="background-color: #f5f5f5; color: #000000;"&gt;}</span>
<span style="color: #0000ff;"&gt;</</span><span style="color: #800000;"&gt;style</span><span style="color: #0000ff;"&gt;></span>