在 Django 中传递多个参数

Question

class Article(models.Model):
      Title     = models.CharField(max_length = 255)
      writing       = models.TextField()
      category  = models.CharField(max_length = 225)
      published = models.DateTimeField(auto_now_add=True)
      updated       = models.DateTimeField(auto_now=True)
      slug      = models.SlugField(blank=True, editable=False)

      def save(self):
         self.slug = slugify(self.Title)
         super().save()

      def get_absolute_url(self):
         url_slug = {'slug':self.slug}
         return reverse('artikel:ArticleDetail', kwargs = url_slug)

      def __str__(self):
         return "{}.{}".format(self.id, self.Title)

我想用 django 建立一个简单的网站，它可以通过表单发布一些文章。问题是我如何在一篇文章中发布多个类别？这是下面的form.py。

from .models import Article
from django.forms import ModelForm 

class ArticleForm(ModelForm):
   class Meta:
      model = Article
      fields = [
        'title',
        'writing',
        'category',
       ]

Answer 1

您可以ManyToManyField 将您的帖子链接到多个类别，例如：

class Category(models.Model):
    name = models.CharField(max_length=128, unique=True)

    def __str__(self):
        return self.name

class Article(models.Model):
    title = models.CharField(max_length=255)
    writing = models.TextField()
    category = models.ManyToManyField(Category)
    published = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)
    slug = models.SlugField(blank=True, editable=False)

    def save(self, *args, **kwargs):
        self.slug = slugify(self.title)
        super().save()

    def get_absolute_url(self):
        return reverse('artikel:ArticleDetail', kwargs={'slug': self.slug})

      def __str__(self):
         return '{}.{}'.format(self.id, self.title)

话虽如此，已经有一些用于此的软件包。 django-taggit [GitHub] 例如，您可以通过以下方式安装它：

pip3 install <b>django-taggit</b>

并将'taggit' 包含在INSTALLED_APPS list [Django-doc] 中：

# settings.py

INSTALLED_APPS = [
    # …,
    'taggit',
    # …
]

然后在您的模型中，您可以将TaggableManager 添加到模型中：

from django.db import models
from taggit.managers import TaggableManager


class Article(models.Model):
    title = models.CharField(max_length=255)
    writing = models.TextField()
    categories = TaggableManager()
    published = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)
    slug = models.SlugField(blank=True, editable=False)

    def save(self, *args, **kwargs):
        self.slug = slugify(self.title)
        super().save()

    def get_absolute_url(self):
        return reverse('artikel:ArticleDetail', kwargs={'slug': self.slug})

      def __str__(self):
         return '{}.{}'.format(self.id, self.title)

正如文档所指定的，它带有一个form field，允许人们编写空格分隔和逗号分隔的标签。