Django之组合查询

一 .Django组合查询

很多电商网站中有组合搜索的功能,所谓组合搜索就是网页中组合多个条件,对数据库中进行查询,并且将结果显示在页面中,下面是所做组合查询效果图：

Django之组合查询

实现代码如下:

<1>设计数据库

from django.db import models

class Direction(models.Model):
    """
    方向：大数据，人工智能，web开发，系统运维，移动开发
    """
    name = models.CharField(verbose_name='名称', max_length=32)

    classification = models.ManyToManyField('Classification')

    class Meta:
        db_table = 'Direction'
        verbose_name_plural = '方向（视频方向）'

    def __str__(self):
        return self.name


class Classification(models.Model):
    """
    分类：Python PHP.......
    """
    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 = (
        (1, '下线'),
        (2, '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', null=True, blank=True,on_delete=models.CASCADE)

    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

modes.py