如何在django管理中显示base64图像？

from django.db import models

class MyModel(models.Model):
    image_data = models.TextField()

from django.contrib import admin
from django.utils.html import format_html

from .models import MyModel

class MyModelAdmin(admin.ModelAdmin):
    list_display = ('id', 'display_image')

    def display_image(self, obj):
        return format_html('<img src="data:image/png;base64,{}" width="100" height="100" />', obj.image_data)

admin.site.register(MyModel, MyModelAdmin)