django中實現組合搜索
阿新 • • 發佈：2019-03-03
關系 list == choice ctype ive 代碼 key sel
一.簡介
# 組合搜索
# 技術方向：自動化，測試，運維，前端
# 分類：Python Linux JavaScript OpenStack Node.js GO
# 級別：初級 中級 高級 骨灰級
有4張表:
Direction(技術方向標),Classification(技術分類表),Level(難度級別表),Video(視頻表)
它們的關系是:
Direction與Classification多對多關系
Video與Classification,Level是一對多關系
最終要實現的結果如下圖:
二.models代碼
class Direction(models.Model):""" 技術方向：自動化，測試，運維，前端 """ name = models.CharField(verbose_name=‘名稱‘, max_length=32) classification = models.ManyToManyField(‘Classification‘) class Meta: # 重命名表名,不要自動添加的app名 db_table = ‘Direction‘ verbose_name_plural = ‘方向（視頻方向）‘ def __str__(self): return self.name class Classification(models.Model): """ 分類：Python Linux JavaScript OpenStack Node.js GO """ name = models.CharField(verbose_name=‘名稱‘, max_length=32) class Meta: db_table = ‘Classification‘ verbose_name_plural = ‘分類（視頻分類）‘ def __str__(self): return self.name class Level(models.Model): title = models.CharField(max_length=32) class Meta: db_table = ‘Level‘ verbose_name_plural = ‘難度級別‘ def __str__(self): return self.title class Video(models.Model): status_choice = ( (1, ‘下線‘), (2, ‘上線‘), ) status = models.IntegerField(verbose_name=‘狀態‘, choices=status_choice, default=1) level = models.ForeignKey(Level) classification = models.ForeignKey(‘Classification‘, null=True, blank=True) weight = models.IntegerField(verbose_name=‘權重（按從大到小排列）‘, default=0) title = models.CharField(verbose_name=‘標題‘, max_length=32) summary = models.CharField(verbose_name=‘簡介‘, max_length=32) # img = models.ImageField(verbose_name=‘圖片‘, upload_to=‘./static/images/Video/‘) img = models.CharField(verbose_name=‘圖片‘, max_length=32) href = models.CharField(verbose_name=‘視頻地址‘, max_length=256) create_date = models.DateTimeField(auto_now_add=True) class Meta: db_table = ‘Video‘ verbose_name_plural = ‘視頻‘ def __str__(self): return self.title
三.url路由代碼
urlpatterns=[ url(r‘^admin‘,admin.site.urls), #利用的是有名分組的方法,分別獲取不同的id url(r‘^video-(?P<direction_id>(\d+))-(?P<classification_id>(\d+))-(?P<level_id>(\d+)).html$‘, views.video, name=‘video‘) ]
四.視圖代碼
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+)) # 構造查詢字典 direction_id = kwargs.get(‘direction_id‘) classification_id = kwargs.get(‘classification_id‘) level_id = kwargs.get(‘level_id‘) # 獲取所有的技術方向 direction_list = models.Direction.objects.all() # 當沒有選擇技術方向時,就獲取所有分類 if direction_id == 0: class_list = models.Classification.objects.all() # 當沒有選擇分類時,不做什麽 if classification_id == 0: pass else: # 否則就將分類id放入字典 condition[‘classification_id‘] = classification_id else: # 當選擇了技術方向id時,查詢出該技術方向下的所有分類 direction_obj = models.Direction.objects.filter(id=direction_id).first() class_list = direction_obj.classification.all() # 只獲取該方向下的分類id vlist = direction_obj.classification.all().values_list(‘id‘) # 下面的代碼為了生成condition是傳入的一對多查詢id,如:{‘classification_id__in‘: (1, 2, 3), ‘level_id‘: 1} if not vlist: classification_id_list = [] else: # 將vlist轉換成列表 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: #指定技術方向：[1,2,3] 分類：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) # 技術方向的queryset對象列表 print(direction_list) # 分類的queryset對象列表 print(class_list) # 等級的queryset對象列表 print(level_list) # video的queryset對象列表 print(video_list) # 技術方向的id,分類的id,等級的id組成的字典 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.模板代碼
<!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>篩選</h1> <div> {% if kwargs.direction_id == 0 %} {#反向解析#} <a href="{% url "video" direction_id=0 classification_id=kwargs.classification_id level_id=kwargs.level_id %}" class="active">全部</a> {% else %} <a href="{% url "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 "video" direction_id=item.id classification_id=kwargs.classification_id level_id=kwargs.level_id %}" class="active">{{ item.name }}</a> {% else %} <a href="{% url "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" class="active">全部</a> {% else %} <a href="/video-{{ kwargs.direction_id }}-0-{{ kwargs.level_id }}.html">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" class="active">{{ item.name }}</a> {% else %} <a href="/video-{{ kwargs.direction_id }}-{{ item.id }}-{{ kwargs.level_id }}.html">{{ item.name }}</a> {% endif %} {% endfor %} </div> <div> {% if kwargs.level_id == 0 %} <a href="/video-{{ kwargs.direction_id }}-{{ kwargs.classification_id }}-0.html" class="active">全部</a> {% else %} <a href="/video-{{ kwargs.direction_id }}-{{ kwargs.classification_id }}-0.html">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" class="active">{{ item.title }}</a> {% else %} <a href="/video-{{ kwargs.direction_id }}-{{ kwargs.classification_id }}-{{ item.id }}.html">{{ item.title }}</a> {% endif %} {% endfor %} </div> </div> <div> <h1>結果</h1> {% for row in video_list %} <div>{{ row.title }}</div> {% endfor %} </div> </body> </html>
django中實現組合搜索