饮冰三年-人工智能-Python-28 企业官网（组合搜索）

1

2：组合搜索

　　2.1 创建model类　　

from django.db import models

class Direction(models.Model):
    """
    方向：自动化、测试、运维、前端
    verbose_name        Admin中显示的字段名称
    """
    name=models.CharField(verbose_name='名称',max_length=32)

    classification = models.ManyToManyField("Classification")
    # Django模型类的Meta是一个内部类，它用于定义一些Django模型类的行为特性。
    class Meta:
        # db_table是指定自定义数据库表明的。 定义该model在数据库中的表名称
        db_table="Direction"
        # 这个选项是指定，模型的复数形式是什么，如果不指定Django会自动在模型名称后加一个’s’
        verbose_name_plural='方向（视频方向）'

    def __str__(self):
        return self.name

class Classification(models.Model):
    '''
    分类：Python Linux Java js
    '''
    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.name

class  Level(models.Model):
    title = models.CharField(max_length=32)

    class Meta:
        verbose_name_plural = '难度级别'

    def __str__(self):
        return  self.title

class Video(models.Model):
    status_choice=(
        (0,'下线'),
        (1,'上线'),
    )
    status=models.IntegerField(verbose_name='状态',choices=status_choice,default=1)
    level=models.ForeignKey(Level,on_delete=models.CASCADE)
    classification = models.ForeignKey('Classification',on_delete=models.CASCADE,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.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_created=True)

    class Meta:
        db_table='Video'
        verbose_name_plural='视频'

    def __str__(self):
        return self.title

model类

　  2.2 创建数据表+创建超级管理员

python manage.py makemigrations

python manage.py migrate　

python manage.py createsuperuser

　　2.3 修改admin.py 文件，将要管理的表注册到系统中　　

from django.contrib import admin
from app01 import models

# Register your models here.
admin.site.register(models.Direction)
admin.site.register(models.Classification)
admin.site.register(models.Level)
admin.site.register(models.Video)

admin.py

　　2.4 进行数据的录入和维护

　　方向表：自动化、测试、运维、前端

　　分类：python、Java、js、Linux

　　级别：初级、高级、骨灰级

　　视频：python初体验

　　2.5 组合搜素（主外键）　　

"""Enterprise URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/2.1/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  path('', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.urls import include, path
    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
"""
from django.contrib import admin
from django.urls import path
from django.conf.urls import url
from app01 import views
urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^video-(?P<classification_id>(\d+))-(?P<level_id>(\d+))-(?P<status>(\d+)).html$',views.video)
]

url

from django.shortcuts import render
from app01 import models
# Create your views here.
def video(request,*args,**kwargs):
    condition={
        #'classification_id':0
        #'level_id':1
        #'status':1
    }
    for k,v in kwargs.items():
        temp = int(v)
        kwargs[k] = temp
        if temp:
            condition[k]=temp
    print(condition)
    class_list = models.Classification.objects.all()
    level_list = models.Level.objects.all()
    status_list = list(map(lambda x:{'id':x[0],'name':x[1]},models.Video.status_choice))
    video_list = models.Video.objects.filter(**condition)
    return render(request,"VideoTest/video.html",{
            'class_list':class_list,
            'level_list':level_list,
            'status_list':status_list,
            'kwargs':kwargs,
            'video_list':video_list,
        })

Views

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .condition a.active {
            background-color: coral;
            color: white;
        }
    </style>
</head>
<body>
<div class="condition">
    <h1>筛选</h1>
    <div>
        {% if kwargs.classification_id == 0 %}
            <a class="active" href="/video-0-{{ kwargs.level_id }}-{{ kwargs.status }}.html">全部</a>
        {% else %}
            <a href="/video-0-{{ kwargs.level_id }}-{{ kwargs.status }}.html">全部</a>
        {% endif %}
        {% for item in class_list %}
            {% if kwargs.classification_id == item.id %}
                <a class="active"
                   href="/video-{{ item.id }}-{{ kwargs.level_id }}-{{ kwargs.status }}.html">{{ item.name }}</a>
            {% else %}
                <a href="/video-{{ item.id }}-{{ kwargs.level_id }}-{{ kwargs.status }}.html">{{ item.name }}</a>
            {% endif %}
        {% endfor %}
    </div>
    <div>
        <a href="/video-{{ kwargs.classification_id }}-0-{{ kwargs.status }}.html">全部</a>
        {% for item in level_list %}
            {% if item.id == kwargs.level_id %}
                <a href="/video-{{ kwargs.classification_id }}-{{ item.id }}-{{ kwargs.status }}.html"
                   class="active">{{ item.title }}</a>
            {% else %}
                <a href="/video-{{ kwargs.classification_id }}-{{ item.id }}-{{ kwargs.status }}.html">{{ item.title }}</a>
            {% endif %}
        {% endfor %}
    </div>
    <div>
        <a href="/video-{{ kwargs.classification_id }}-{{ kwargs.level_id }}-0.html">全部</a>
        {% for item in status_list %}
            {% if item.id == kwargs.status %}
                <a class="active"
                   href="/video-{{ kwargs.classification_id }}-{{ kwargs.level_id }}-{{ item.id }}.html">{{ item.name }}</a>
            {% else %}
                <a href="/video-{{ kwargs.classification_id }}-{{ kwargs.level_id }}-{{ item.id }}.html">{{ item.name }}</a>
            {% endif %}
        {% endfor %}
    </div>
</div>
<div>
    <h1>结果</h1>
    <div>
        {% for row in video_list  %}
            <div>{{ row.title }}</div>
        {% endfor %}
    </div>
</div>
</body>
</html>

html

　　2.6 组合搜素（多对多）

"""Enterprise URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/2.1/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  path('', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.urls import include, path
    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
"""
from django.contrib import admin
from django.urls import path
from django.conf.urls import url
from app01 import views
urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^video-(?P<classification_id>(\d+))-(?P<level_id>(\d+))-(?P<status>(\d+)).html$',views.video),
    url(r'^video2-(?P<direction_id>(\d+))-(?P<classification_id>(\d+))-(?P<level_id>(\d+)).html$', views.video2)
]

url

from django.shortcuts import render
from app01 import models

# Create your views here.
def video(request, *args, **kwargs):
    condition = {
        # 'classification_id':0
        # 'level_id':1
        # 'status':1
    }
    for k, v in kwargs.items():
        temp = int(v)
        kwargs[k] = temp
        if temp:
            condition[k] = temp
    print(condition)
    class_list = models.Classification.objects.all()
    level_list = models.Level.objects.all()
    status_list = list(map(lambda x: {'id': x[0], 'name': x[1]}, models.Video.status_choice))
    video_list = models.Video.objects.filter(**condition)
    return render(request, "VideoTest/video.html", {
        'class_list': class_list,
        'level_list': level_list,
        'status_list': status_list,
        'kwargs': kwargs,
        'video_list': video_list,
    })

def video2(request, *args, **kwargs):
    condition = {
        # 'direction':1
        # 'classification_id':0
        # 'level_id':1
    }
    for k, v in kwargs.items():
        temp = int(v)
        kwargs[k] = temp

    direction_id = kwargs.get('direction_id')
    classification_id = kwargs.get('classification_id')
    level_id = kwargs.get('level_id')

    direction_list = models.Direction.objects.all()

    if direction_id ==0 :
        # 表示方向选择的是“全部”-百无禁忌
        class_list = models.Classification.objects.all()
        if classification_id ==0 :
            pass
        else:
            # 加入到条件字典中
            condition["classification_id"]=classification_id
    else :
        direction_obj = models.Direction.objects.filter(id=direction_id).first()
        # 选择该方向下的所有分类
        class_list = direction_obj.classification.all()
        #选择分类的所有id
        class_list_v_id = direction_obj.classification.all().values_list('id')

        if not class_list_v_id:
            clssification_id_list = []
        else:
            clssification_id_list = list(zip(*class_list_v_id))[0]

        if classification_id == 0:
            # 说明选择了该方向=====》所有分类
            condition['classification_id__in'] = clssification_id_list
        else:
            # 说明选择了一个分类，但是要判断该分类是否包含着该方向下
            if classification_id in clssification_id_list:
                condition['classification_id'] = classification_id
            else:
                # 说明该分类下并没有在当前选中的方向下
                kwargs["classification_id"]=0
                condition['classification_id__in'] = clssification_id_list

    if level_id == 0:
        pass
    else:
        condition['level_id'] = level_id
    print(condition)
    level_list = models.Level.objects.all()
    video_list = models.Video.objects.filter(**condition)
    return render(request, "VideoTest/video2.html", {
        'direction_list': direction_list,
        'class_list': class_list,
        'level_list': level_list,
        'kwargs': kwargs,
        'video_list': video_list,
    })

Views

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .condition a.active {
            background-color: coral;
            color: white;
        }
    </style>
</head>
<body>
<div class="condition">
    <h1>筛选</h1>
    <div>
        <a href="/video2-0-{{ kwargs.classification_id }}-{{ kwargs.level_id }}.html">全部</a>
        {% for item in direction_list %}
            {% if item.id == kwargs.direction_id %}
                <a class="active"
                   href="/video2-{{ item.id }}-{{ kwargs.classification_id }}-{{ kwargs.level_id }}.html">{{ item.name }}</a>
            {% else %}
                <a href="/video2-{{ item.id }}-{{ kwargs.classification_id }}-{{ kwargs.level_id }}.html">{{ item.name }}</a>
            {% endif %}
        {% endfor %}
    </div>
    <div>
        {% if kwargs.classification_id == 0 %}
            <a class="active" href="/video2-{{ kwargs.direction_id }}-0-{{ kwargs.level_id }}.html">全部</a>
        {% else %}
            <a href="/video2-{{ kwargs.direction_id }}-0-{{ kwargs.level_id }}.html">全部</a>
        {% endif %}
        {% for item in class_list %}
            {% if kwargs.classification_id == item.id %}
                <a class="active"
                   href="/video2-{{ kwargs.direction_id }}-{{ item.id }}-{{ kwargs.level_id }}.html">{{ item.name }}</a>
            {% else %}
                <a href="/video2-{{ kwargs.direction_id }}-{{ item.id }}-{{ kwargs.level_id }}.html">{{ item.name }}</a>
            {% endif %}
        {% endfor %}
    </div>
    <div>
        <a href="/video2-{{ kwargs.direction_id }}-{{ kwargs.classification_id }}-0.html">全部</a>
        {% for item in level_list %}
            {% if item.id == kwargs.level_id %}
                <a href="/video2-{{ kwargs.direction_id }}-{{ kwargs.classification_id }}-{{ item.id }}.html"
                   class="active">{{ item.title }}</a>
            {% else %}
                <a href="/video2-{{ kwargs.direction_id }}-{{ kwargs.classification_id }}-{{ item.id }}.html">{{ item.title }}</a>
            {% endif %}
        {% endfor %}
    </div>

</div>
<div>
    <h1>结果</h1>
    <div>
        {% for row in video_list %}
            <div>{{ row.title }}</div>
        {% endfor %}
    </div>
</div>
</body>
</html>

html