from django.db import models
from django.contrib.postgres.fields import ArrayField, JSONField

方法1：多对多关系

class Tag(models.Model):
name = models.CharField(max_length=50)

class Article(models.Model):
title = models.CharField(max_length=100)
tags = models.ManyToManyField(Tag) # 多对多字段

方法2：PostgreSQL的ArrayField

class Product(models.Model):
name = models.CharField(max_length=100)
colors = ArrayField(models.CharField(max_length=20)) # 字符串数组

方法3：JSONField

class UserProfile(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE)
preferences = JSONField() # 存储任意JSON数据