基本上，我要实现的是拥有一个媒体表单，该表单在我在添加或编辑界面中选择文件后显示图像缩略图。我尝试使用此代码，但此错误返回。
Unknown field(s) (admin_image) specified for ImageMedia.
Check fields/fieldsets/exclude attributes of class ImageMediaAdmin.
这是模型类：
class ImageMedia(models.Model):
caption = models.CharField(max_length=64)
picture = models.ImageField(upload_to='image_media', blank=True)
def admin_image(self):
return '<img src="%s" height="300px"/>' % self.picture
admin_image.allow_tags = True
def __str__(self):
return self.caption
这是管理类
class ImageMediaAdmin(admin.ModelAdmin):
list_display = ('caption', 'picture', 'admin_image')
search_fields = ('caption', 'picture')
fields = ('caption', 'picture', 'admin_image')
admin.site.register(ImageMedia, ImageMediaAdmin)
您需要更改ImageMediaAdmin以指定admin_image为readonly_field。
class ImageMediaAdmin(admin.ModelAdmin):
list_display = ('caption', 'picture', 'admin_image')
search_fields = ('caption', 'picture')
fields = ('caption', 'picture', 'admin_image')
readonly_fields = ['admin_image']
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我来说两句