django组合搜索实现过程详解(附代码)

2019-11-25 12:05:34

字体：大中小

来源：转载

供稿：网友

一.简介

# 组合搜索
# 技术方向：自动化，测试，运维，前端
# 分类：Python Linux JavaScript OpenStack Node.js GO
# 级别：初级中级高级骨灰级

有4张表:

Direction(技术方向标),Classification(技术分类表),Level(难度级别表),Video(视频表)

它们的关系是:

Direction与Classification多对多关系

Video与Classification,Level是一对多关系

最终要实现的结果如下图:

二.models代码

class Direction(models.Model):  """  技术方向：自动化，测试，运维，前端  """  name = models.CharField(verbose_name='名称', max_length=32)  classification = models.ManyToManyField('Classification')  class Meta:    # 重命名表名,不要自动添加的app名    db_table = 'Direction'    verbose_name_plural = '方向（视频方向）'  def __str__(self):    return self.nameclass Classification(models.Model):  """  分类：Python Linux JavaScript OpenStack Node.js GO  """  name = models.CharField(verbose_name='名称', max_length=32)  class Meta:    db_table = 'Classification'    verbose_name_plural = '分类（视频分类）'  def __str__(self):    return self.nameclass Level(models.Model):  title = models.CharField(max_length=32)  class Meta:    db_table = 'Level'    verbose_name_plural = '难度级别'  def __str__(self):    return self.titleclass Video(models.Model):  status_choice = (    (1, '下线'),    (2, '上线'),  )  status = models.IntegerField(verbose_name='状态', choices=status_choice, default=1)  level = models.ForeignKey(Level)  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/')  img = models.CharField(verbose_name='图片', max_length=32)  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 = '视频'  def __str__(self):    return self.title

三.url路由代码

urlpatterns=[  url(r'^admin',admin.site.urls),  #利用的是有名分组的方法,分别获取不同的id  url(r'^video-(?P<direction_id>(/d+))-(?P<classification_id>(/d+))-(?P<level_id>(/d+)).html$', views.video,    name='video')]

四.视图代码

def video(request,*args,**kwargs):  condition = {}  for k, v in kwargs.items():    temp = int(v)    kwargs[k] = temp  print(kwargs) #　(?P<direction_id>(/d+))-(?P<classification_id>(/d+))-(?P<level_id>(/d+))  # 构造查询字典  direction_id = kwargs.get('direction_id')  classification_id = kwargs.get('classification_id')  level_id = kwargs.get('level_id')  # 获取所有的技术方向  direction_list = models.Direction.objects.all()  # 当没有选择技术方向时,就获取所有分类  if direction_id == 0:    class_list = models.Classification.objects.all()    # 当没有选择分类时,不做什么    if classification_id == 0:      pass    else:      # 否则就将分类id放入字典      condition['classification_id'] = classification_id  else:    # 当选择了技术方向id时,查询出该技术方向下的所有分类    direction_obj = models.Direction.objects.filter(id=direction_id).first()    class_list = direction_obj.classification.all()    # 只获取该方向下的分类id    vlist = direction_obj.classification.all().values_list('id')    # 下面的代码为了生成condition是传入的一对多查询id,如:{'classification_id__in': (1, 2, 3), 'level_id': 1}    if not vlist:      classification_id_list = []    else:      # 将vlist转换成列表      classification_id_list = list(zip(*vlist))[0]    if classification_id == 0:      condition['classification_id__in'] = classification_id_list    else:      if classification_id in classification_id_list:        condition['classification_id'] = classification_id      else:        #指定技术方向：[1,2,3]  分类：5        kwargs['classification_id'] = 0        condition['classification_id__in'] = classification_id_list  if level_id == 0:    pass  else:    condition['level_id'] = level_id  level_list = models.Level.objects.all()  video_list = models.Video.objects.filter(**condition)  # 技术方向的queryset对象列表  print(direction_list)  # 分类的queryset对象列表  print(class_list)  # 等级的queryset对象列表  print(level_list)  # video的queryset对象列表  print(video_list)  # 技术方向的id,分类的id,等级的id组成的字典  print(kwargs)  return render(    request,    'video.html',    {      'direction_list':direction_list,      'class_list':class_list,      'level_list':level_list,      'video_list':video_list,      'kwargs':kwargs,    }  )

五.模板代码

<!DOCTYPE html><html lang="en"><head>  <meta charset="UTF-8">  <title>Title</title>  <style>    .condition a {      display: inline-block;      padding: 5px 8px;      border: 1px solid #dddddd;    }    .condition a.active {      background-color: coral;      color: white;    }  </style></head><body><div class="condition">  <h1>筛选</h1>  <div>    {% if kwargs.direction_id == 0 %}      {#反向解析#}      <a href="{% url " rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" video" direction_id=0 classification_id=kwargs.classification_id level_id=kwargs.level_id %}"        class="active">全部</a>    {% else %}      <a href="{% url " rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" video" direction_id=0 classification_id=kwargs.classification_id level_id=kwargs.level_id %}">全部</a>    {% endif %}    {% for item in direction_list %}      {% if item.id == kwargs.direction_id %}        <a href="{% url " rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" video" direction_id=item.id classification_id=kwargs.classification_id level_id=kwargs.level_id %}"          class="active">{{ item.name }}</a>      {% else %}        <a href="{% url " rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" video" direction_id=item.id classification_id=kwargs.classification_id level_id=kwargs.level_id %}">{{ item.name }}</a>      {% endif %}    {% endfor %}  </div>  <div>    {% if kwargs.classification_id == 0 %}      <a href="/video-{{ kwargs.direction_id }}-0-{{ kwargs.level_id }}.html" rel="external nofollow" rel="external nofollow" class="active">全部</a>    {% else %}      <a href="/video-{{ kwargs.direction_id }}-0-{{ kwargs.level_id }}.html" rel="external nofollow" rel="external nofollow" >全部</a>    {% endif %}    {% for item in class_list %}      {% if item.id == kwargs.classification_id %}        <a href="/video-{{ kwargs.direction_id }}-{{ item.id }}-{{ kwargs.level_id }}.html" rel="external nofollow" rel="external nofollow"           class="active">{{ item.name }}</a>      {% else %}        <a href="/video-{{ kwargs.direction_id }}-{{ item.id }}-{{ kwargs.level_id }}.html" rel="external nofollow" rel="external nofollow" >{{ item.name }}</a>      {% endif %}    {% endfor %}  </div>  <div>    {% if kwargs.level_id == 0 %}      <a href="/video-{{ kwargs.direction_id }}-{{ kwargs.classification_id }}-0.html" rel="external nofollow" rel="external nofollow" class="active">全部</a>    {% else %}      <a href="/video-{{ kwargs.direction_id }}-{{ kwargs.classification_id }}-0.html" rel="external nofollow" rel="external nofollow" >全部</a>    {% endif %}    {% for item in level_list %}      {% if item.id == kwargs.level_id %}        <a href="/video-{{ kwargs.direction_id }}-{{ kwargs.classification_id }}-{{ item.id }}.html" rel="external nofollow" rel="external nofollow"           class="active">{{ item.title }}</a>      {% else %}        <a href="/video-{{ kwargs.direction_id }}-{{ kwargs.classification_id }}-{{ item.id }}.html" rel="external nofollow" rel="external nofollow" >{{ item.title }}</a>      {% endif %}    {% endfor %}  </div></div><div>  <h1>结果</h1>  {% for row in video_list %}    <div>{{ row.title }}</div>  {% endfor %}</div></body></html>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持武林网。

上一篇：django基于cors解决跨域请求问题详解

下一篇：使用Python自动生成HTML的方法示例