如何在Django模型中使用数组字段？

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

class MyModel(models.Model):
    my_array = ArrayField(models.CharField(max_length=100))

python manage.py makemigrations
python manage.py migrate

obj = MyModel.objects.create(my_array=['item1', 'item2', 'item3'])

obj = MyModel.objects.get(pk=1)

obj.my_array.append('new_item')
obj.save()

obj.my_array.remove('item1')
obj.save()

objs = MyModel.objects.filter(my_array__contains='item2')

length = MyModel.objects.annotate(array_length=models.functions.ArrayLength('my_array')).values('array_length')