如何自定义更改django中数据格式的模型或管理器？

Question

我有一个 Article 模型，包含一个 title 列，可以与白色 space 混合存储，我想要的是，每次查询文章时， space in title 内容可以用破折号代替，为了url 友好。

models.py:

class Article(models.Model):
    STATUS = (
        (0,'on'),
        (1,'off')
    )
    #id = models.IntegerField(primary_key=True,help_text='primary key',auto_created=True)
    category = models.ForeignKey(Category,related_name='articles', help_text='foreigner key reference Category')
    #author = models.ForeignKey(myadmin.User, help_text='foreigner key reference myadmin User')
    title = models.CharField(max_length=100, help_text='article title')
    description = models.TextField(help_text='article brief description')
    content = models.TextField(help_text='article content')
    like = models.IntegerField(default=0,help_text='like numbers')
    secretcode = models.CharField(max_length=512,help_text='who has the code can scan')
    status = models.IntegerField(choices=STATUS,help_text='status of the article')
    createtime = models.DateTimeField(auto_now_add=True,help_text='time that first created')
    modifytime = models.DateTimeField(auto_now=True,help_text='time when modified')

    articles = models.Manager()

    def __str__(self):
        return self.title
    class Meta:
        db_table = 'article'

我的view.py:

def get(self,request):
        offset = int(request.GET.get('offset', 0))
        category = request.GET.get('category')
        end = offset+10
        articlecatalogs = Article.articles.filter(category__name=category)[offset:end]

我想创建一个自定义管理器并定义一个方法来转换数据，但是所需的查询条件来自请求，在这里，我不知道该怎么做？有人可以帮助我吗？

Answer 1

我认为你也必须使用 slug filed 并覆盖你的保存方法来保存 slug 是这样的：

class Article(models.Model):
    slug = models.SlugField("slug")
    category = models.ForeignKey(Category,related_name='articles', help_text='foreigner key reference Category')
  -- more fields --

    def __str__(self):
        return self.title

    def get_absolute_url(self):
        return self.slug

    def save(self, *args, **kwargs):
        if not self.slug:
             self.slug = self.title.strip(" ").replace(' ','-')
        super(Article, self).save(self, *args, **kwargs)

    @property
    def get_title(self):
        """ write python code for remove extra spaces so can can dispay your tile in html and call this method with instance when you want to print title """
        return new_title_without_extra_spaces

对于详细信息页面，您可以使用 slug 值来获取实例。希望这对您有所帮助。

如何自定义更改django中数据格式的模型或管理器？

How to customize Model or Manager that change the data format in django?

python

django

django-models