1. Simple implementation
Associated files:
from django.conf.urls import url from . import views urlpatterns = [ url(r'^index.html/$',views.index), url(r'^article/(?P<article_type>\d+)-(?P<category>\d+).html/$',views.article) ] url.py
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.condition a{
display:inline-block;
padding: 3px 5px;
border: 1px solid black;
}
.condition a.active{
background-color: brown;
}
</style>
</head>
<body>
<h2>过滤条件</h2>
<div>
{% if kwargs.article_type == 0 %}
<a href="/article/0-{{ kwargs.category }}.html">全部</a>
{% else %}
<a href="/article/0-{{ kwargs.category }}.html">全部</a>
{% endif %}
{% for row in article_type %}
{% if row.id == kwargs.article_type %}
<a href="/article/{{ row.id }}-{{ kwargs.category }}.html">{{ row.caption }}</a>
{% else %}
<a href="/article/{{ row.id }}-{{ kwargs.category }}.html">{{ row.caption }}</a>
{% endif %}
{% endfor %}
</div>
<div>
{% if kwargs.category == 0 %}
<a href="/article/{{ kwargs.article_type }}-0.html">全部</a>
{% else %}
<a href="/article/{{ kwargs.article_type }}-0.html">全部</a>
{% endif %}
{% for row in category %}
{% if row.id == kwargs.category %}
<a href="/article/{{ kwargs.article_type }}-{{ row.id }}.html">{{ row.caption }}</a>
{% else %}
<a href="/article/{{ kwargs.article_type }}-{{ row.id }}.html">{{ row.caption }}</a>
{% endif %}
{% endfor %}
</div>
<h2>查询结果</h2>
<ul>
{% for row in articles %}
<li>{{ row.id }}-{{ row.title }}------[{{ row.article_type.caption }}]-[{{ row.category.caption }}]</li>
{% endfor %}
</ul>
</body>
</html>
article.htmlDatabase structure:
from django.db import models # Create your models here. class Categoery(models.Model): caption = models.CharField(max_length=16) class ArticleType(models.Model): caption = models.CharField(max_length=16) class Article(models.Model): title = models.CharField(max_length=32) content = models.CharField(max_length=255) category = models.ForeignKey(Categoery) article_type = models.ForeignKey(ArticleType)
Processing files:
from . import models
def article(request,*args,**kwargs):
search_dict = {}
for key,value in kwargs.items():
kwargs[key] = int(value) # 把字符类型转化为int类型 方便前端做if a == b 这样的比较
if value !='0':
search_dict[key] = value
articles = models.Article.objects.filter(**search_dict) # 字典为空时表示搜索所有
article_type = models.ArticleType.objects.all()
category = models.Categoery.objects.all()
return render(request,'article.html',{'articles':articles,
'article_type':article_type,
'category':category ,
'kwargs':kwargs})Note: It is not necessary to implement this function Difficult, the most important thing is to clarify the ideas inside; first, determine the url access path format http://127.0.0.1:8000/article/0-0.html, the first 0 represents the article_type field, and the second 0 Indicates the category field. If it is zero, it means searching for all information in this field. Confirming this is the first step to success. There is retrieval processing on the processing file; the second key point is to generate a dictionary search_dict for related searches. If If it is 0, it means searching all; the third key point is also a very clever way, passing the parameter kwargs to the front end again, it is a stroke of genius!
2. Another attempt (loading memory tuning)
Since the ArticleType type is fixed data for the blog, it will not be changed later, so you can load the data into the memory to speed up the query
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.condition a{
display:inline-block;
padding: 3px 5px;
border: 1px solid black;
}
.condition a.active{
background-color: brown;
}
</style>
</head>
<body>
<h2>过滤条件</h2>
<div>
{% if kwargs.article_type_id == 0 %}
<a href="/article/0-{{ kwargs.category_id }}.html">全部</a>
{% else %}
<a href="/article/0-{{ kwargs.category_id }}.html">全部</a>
{% endif %}
{% for row in article_type%}
{% if row.0 == kwargs.article_type_id %}
<a href="/article/{{ row.0 }}-{{ kwargs.category_id }}.html">{{ row.1 }}</a>
{% else %}
<a href="/article/{{ row.0 }}-{{ kwargs.category_id }}.html">{{ row.1 }}</a>
{% endif %}
{% endfor %}
</div>
<div>
{% if kwargs.category_id == 0 %}
<a href="/article/{{ kwargs.article_type_id }}-0.html">全部</a>
{% else %}
<a href="/article/{{ kwargs.article_type_id }}-0.html">全部</a>
{% endif %}
{% for row in category %}
{% if row.id == kwargs.category_id %}
<a href="/article/{{ kwargs.article_type_id }}-{{ row.id }}.html">{{ row.caption }}</a>
{% else %}
<a href="/article/{{ kwargs.article_type_id }}-{{ row.id }}.html">{{ row.caption }}</a>
{% endif %}
{% endfor %}
</div>
<h2>查询结果</h2>
<ul>
{% for row in articles %}
<li>{{ row.id }}-{{ row.title }}------[{{ row.article_type }}]-[{{ row.category.caption }}]</li>
{% endfor %}
</ul>
</body>
</html>
article.htmlfrom django.shortcuts import render
from django.shortcuts import HttpResponse
# Create your views here.
def index(request):
return HttpResponse('Ok')
from . import models
def article(request,*args,**kwargs):
search_dict = {}
for key,value in kwargs.items():
kwargs[key] = int(value) # 把字符类型转化为int类型 方便前端做if a == b 这样的比较
if value !='0':
search_dict[key] = value
print(kwargs)
articles = models.Article.objects.filter(**search_dict) # 字典为空时表示搜索所有
article_type = models.Article.type_choice
print(article_type)
category = models.Categoery.objects.all()
return render(request,'article.html',{'articles':articles,
'article_type':article_type,
'category':category ,
'kwargs':kwargs})
处理文件.pyDatabase file:
from django.db import models # Create your models here. class Categoery(models.Model): caption = models.CharField(max_length=16) # class ArticleType(models.Model): # caption = models.CharField(max_length=16) class Article(models.Model): title = models.CharField(max_length=32) content = models.CharField(max_length=255) category = models.ForeignKey(Categoery) # article_type = models.ForeignKey(ArticleType) type_choice = [ (1,'Python'), (2,'Linux'), (3,'大数据'), (4,'架构'), ] article_type_id = models.IntegerField(choices=type_choice)
3. Use simple_tag to optimize the code
Associated files:
from django.db import models # Create your models here. class Categoery(models.Model): caption = models.CharField(max_length=16) class ArticleType(models.Model): caption = models.CharField(max_length=16) class Article(models.Model): title = models.CharField(max_length=32) content = models.CharField(max_length=255) category = models.ForeignKey(Categoery) article_type = models.ForeignKey(ArticleType) # type_choice = [ # (1,'Python'), # (2,'Linux'), # (3,'大数据'), # (4,'架构'), # ] # article_type_id = models.IntegerField(choices=type_choice) 数据库文件.py
from django.shortcuts import render
from django.shortcuts import HttpResponse
# Create your views here.
def index(request):
return HttpResponse('Ok')
from . import models
def article(request, *args, **kwargs):
search_dict = {}
for key, value in kwargs.items():
kwargs[key] = int(value) # 把字符类型转化为int类型 方便前端做if a == b 这样的比较
if value != '0':
search_dict[key] = value
articles = models.Article.objects.filter(**search_dict) # 字典为空时表示搜索所有
article_type = models.ArticleType.objects.all()
print(article_type)
category = models.Categoery.objects.all()
return render(request, 'article.html', {'articles': articles,
'article_type': article_type,
'category': category,
'kwargs': kwargs})
处理文件.py{% load filter %}
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.condition a{
display:inline-block;
padding: 3px 5px;
border: 1px solid black;
}
.condition a.active{
background-color: brown;
}
</style>
</head>
<body>
<h2>过滤条件</h2>
<div>
{% filter_all kwargs 'article_type'%}
{% filter_single article_type kwargs 'article_type'%}
</div>
<div>
{% filter_all kwargs 'category'%}
{% filter_single category kwargs 'category'%}
</div>
<h2>查询结果</h2>
<ul>
{% for row in articles %}
<li>{{ row.id }}-{{ row.title }}------[{{ row.article_type.caption }}]-[{{ row.category.caption }}]</li>
{% endfor %}
</ul>
</body>
</html>
article.htmlCreate templatetags directory , create the filter.py file in the directory:
from django import template from django.utils.safestring import mark_safe register = template.Library() @register.simple_tag def filter_all(kwargs,type_str): print(type_str) if type_str == 'article_type': if kwargs['article_type'] == 0: tmp = '<a href = "/article/0-%s.html" class ="active" > 全部 </a>'%(kwargs['category']) else: tmp = '<a href = "/article/0-%s.html"> 全部 </a>'%(kwargs['category']) elif type_str == 'category': if kwargs['category'] == 0: tmp = '<a href = "/article/%s-0.html" class ="active" > 全部 </a>' % (kwargs['article_type']) else: tmp = '<a href = "/article/%s-0.html"> 全部 </a>' % (kwargs['article_type']) return mark_safe(tmp) @register.simple_tag() def filter_single(type_obj,kwargs,type_str): print(type_str) tmp = '' if type_str == 'article_type': for row in type_obj: if row.id == kwargs['article_type']: tag = '<a class="active" href="/article/%s-%s.html">%s</a>\n'%(row.id,kwargs['category'],row.caption) else: tag = '<a href="/article/%s-%s.html">%s</a>\n' % (row.id, kwargs['category'],row.caption) tmp +=tag elif type_str == 'category': for row in type_obj: if row.id == kwargs['category']: tag = '<a class="active" href="/article/%s-%s.html">%s</a>\n' % (kwargs['article_type'],row.id, row.caption) else: tag = '<a href="/article/%s-%s.html">%s</a>\n' % (kwargs['article_type'], row.id, row.caption) tmp += tag return mark_safe(tmp)
HTML file main content:
{% load filter %}
<body>
<h2>过滤条件</h2>
<div class="condition">
{% filter_all kwargs 'article_type'%}
{% filter_single article_type kwargs 'article_type'%}
</div>
<div class="condition">
{% filter_all kwargs 'category'%}
{% filter_single category kwargs 'category'%}
</div>
<h2>查询结果</h2>
<ul>
{% for row in articles %}
<li>{{ row.id }}-{{ row.title }}------[{{ row.article_type.caption }}]-[{{ row.category.caption }}]</li>
{% endfor %}
</ul>
</body>JSONP
JSONP (JSON with Padding) is a "usage mode" of JSON ”, which can be used to solve the problem of cross-domain data access by mainstream browsers. Due to the same-origin policy, generally speaking, web pages located at server1.example.com cannot communicate with servers other than server1.example.com, with the exception of the HTML
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