class Video(models.Model):status_choice = ((0, u'下线'),(1, u'上线'),)level_choice = ((1, u'初级'),(2, u'中级'),(3, u'高级'),)status = models.IntegerField(verbose_name='状态', choices=status_choice, default=1)level = models.IntegerField(verbose_name='级别', choices=level_choice, default=1)classification = models.ForeignKey('Classification', null=True, blank=True)weight = models.IntegerField(verbose_name='权重（按从大到小排列）', default=0)title = models.CharField(verbose_name='标题', max_length=32)summary = models.CharField(verbose_name='简介', max_length=32)img = models.ImageField(verbose_name='图片', upload_to='./static/images/Video/')href = models.CharField(verbose_name='视频地址', max_length=256)create_date = models.DateTimeField(auto_now_add=True)class Meta:db_table = 'Video'verbose_name_plural = u'视频'def __str__(self):return self.title

class Direction(models.Model):weight = models.IntegerField(verbose_name='权重（按从大到小排列）', default=0)name = models.CharField(verbose_name='名称', max_length=32)classification = models.ManyToManyField('Classification')class Meta:db_table = 'Direction'verbose_name_plural = u'方向（视频方向）'def __str__(self):return self.name

class Classification(models.Model):weight = models.IntegerField(verbose_name='权重（按从大到小排列）', default=0)name = models.CharField(verbose_name='名称', max_length=32)class Meta:db_table = 'Classification'verbose_name_plural = u'分类（视频分类）'def __str__(self):return self.name

from django.conf.urls import url
from django.contrib import admin
from app01 import views
urlpatterns = [url(r'^admin/', admin.site.urls),url(r'^video-(?P<direction_id>\d+)-(?P<classification_id>\d+)-(?P<level_id>\d+).html', views.video),
]

    <h3>选择：</h3><div>{% action_all current_url 1 %} :{% for item in direction_list %}{% action current_url item %}{% endfor %}</div><div>{% action_all current_url 2 %} :{% for item in class_list %}{% action current_url item %}{% endfor %}</div><div>{% action_all current_url 3 %} :{% for item in level_list %}{% action current_url item %}{% endfor %}</div>

@register.simple_tag
def action_all(current_url,index):"""获取当前url，video-1-1-2.html:param current_url::param item::return:"""url_part_list = current_url.split('-')if index == 3:if url_part_list[index] == "0.html":temp = "<a href='%s' class='active'>全部</a>"else:temp = "<a href='%s'>全部</a>"url_part_list[index] = "0.html"else:if url_part_list[index] == "0":temp = "<a href='%s' class='active'>全部</a>"else:temp = "<a href='%s'>全部</a>"url_part_list[index] = "0"href = '-'.join(url_part_list)temp = temp % (href,)return mark_safe(temp)@register.simple_tag
def action(current_url, item,index):# videos-0-0-1.html# item: id name# video-   2   -0-0.htmlurl_part_list = current_url.split('-')if index == 3:if str(item['id']) == url_part_list[3].split('.')[0]:　　#如果当前标签被选中temp = "<a href='%s' class='active'>%s</a>"else:temp = "<a href='%s'>%s</a>"url_part_list[index] = str(item['id']) + '.html' #拼接对应位置的部分urlelse:if str(item['id']) == url_part_list[index]:temp = "<a href='%s' class='active'>%s</a>"else:temp = "<a href='%s'>%s</a>"url_part_list[index] = str(item['id'])ur_str = '-'.join(url_part_list)  #拼接整体urltemp = temp %(ur_str, item['name']) #生成对应的a标签return mark_safe(temp)  #返回安全的html

    <h3>视频：</h3>{% for item in video_list %}<a class="item" href="{{ item.href }}"><img src="/{{ item.img }}" width="300px" height="400px"><p>{{ item.title }}</p><p>{{ item.summary }}</p></a>{% endfor %}

def video(request,*args,**kwargs):print(kwargs)# 当前请求的路径request_path = request.path# 从数据库获取视频时的filter条件字典q = {}# 状态为审核通过的q['status'] = 1# 获取url中的视频分类idclass_id = int(kwargs.get('classification_id'))# 从数据库中获取所有的视频方向（包括视频方向的id和name）direction_list = models.Direction.objects.all().values('id','name')# 如果视频方向是0if kwargs.get('direction_id') == '0':# 方向选择全部# 方向id=0，即获取所有的视频分类（包括视频分类的id和name）class_list = models.Classification.objects.all().values('id', 'name')# 如果视频分类id也为0，即全部分类，那就什么都不用做，因为已经全取出来了if kwargs.get('classification_id') == '0':passelse:# 如果视频分类不是全部，过滤条件为视频分类id在[url中的视频分类id]q['classification_id__in'] = [class_id,]else:print('方向不为0')# 方向选择某一个方向，# 如果分类是0if kwargs.get('classification_id') == '0':print('分类为0')# 获取已选择的视频方向obj = models.Direction.objects.get(id=int(kwargs.get('direction_id')))# 获取该方向的所有视频分类class_list = obj.classification.all().values('id', 'name')# 获取所有视频分类对应的视频分类idid_list = list(map(lambda x: x['id'], class_list))# 过滤条件为视频分类id in [该方向下的所有视频分类id]q['classification_id__in'] = id_list else:# 方向不为0，分类也不为0obj = models.Direction.objects.get(id=int(kwargs.get('direction_id')))class_list = obj.classification.all().values('id', 'name')id_list = list(map(lambda x:x['id'], class_list))# 过滤条件为视频分类id in [已经选择的视频分类id]q['classification_id__in'] = [class_id,] print('分类不为0')# 当前分类如果在获取的所有分类中，则方向下的所有相关分类显示# 当前分类如果不在获取的所有分类中，if int(kwargs.get('classification_id')) in id_list:passelse:print('不再,获取指定方向下的所有分类：选中的回到全部')url_part_list = request_path.split('-')url_part_list[2] = '0'request_path = '-'.join(url_part_list)# 视频等级idlevel_id = int(kwargs.get('level_id'))if level_id == 0:passelse:# 过滤条件增加视频等级q['level'] = level_id # 取出相对应的视频video_list = models.Video.objects.filter(**q).values('title','summary', 'img', 'href')# 把视频等级转化为单个标签是字典格式，整体是列表格式ret = map(lambda x:{"id": x[0], 'name': x[1]}, models.Video.level_choice)level_list = list(ret)return render(request, 'video.html', {'direction_list': direction_list,'class_list': class_list,'level_list': level_list,'current_url': request_path,"video_list": video_list})