使用Django实现文章与多个标签关联的示例详解

from django.db import models

class Tag(models.Model):
    name = models.CharField(max_length=255, unique=True)

    def __str__(self):
        return self.name

class Article(models.Model):
    title = models.CharField(max_length=255)
    content = models.TextField()
    tags = models.ManyToManyField(Tag, related_name='articles', blank=True)

    def __str__(self):
        return self.title

# 创建标签
tag1 = Tag.objects.create(name='Django')
tag2 = Tag.objects.create(name='Python')

# 创建文章
article = Article.objects.create(title='Learning Django', content='This is a tutorial about Django.')

# 添加标签到文章
article.tags.add(tag1, tag2)

# 获取文章的所有标签
article_tags = article.tags.all()

# 获取标签的所有文章
tag_articles = tag1.articles.all()

from django.contrib import admin
from .models import Article, Tag

class ArticleAdmin(admin.ModelAdmin):
    list_display = ('title', 'content', 'display_tags')
    filter_horizontal = ('tags',)

    def display_tags(self, obj):
        return ", ".join([tag.name for tag in obj.tags.all()])
    display_tags.short_description = 'Tags'

admin.site.register(Article, ArticleAdmin)
admin.site.register(Tag)