如何在Django Admin的模型细节视图中显示图像？

Question

当通过Django Admin浏览时，我想在模型的详细视图中显示图像。我在Django Admin中看到过关于在模型的所有实例的列表视图中显示图像的其他帖子。但我感兴趣的是查看页面上的图像，您可以在其中编辑数据。

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models.py

class Label(models.Model):
    label = models.TextField()
    fragment = models.ForeignKey('Fragment', models.DO_NOTHING, null=True)
    in_english = models.BooleanField(default=True)

    validated = models.BooleanField(default=False)

    def __str__(self):
        return str(self.fragment)

admin.py

@admin.register(Label)
class LabelsAdmin(admin.ModelAdmin):
    fields = ("label", "in_english", "validated", )
    
    # What I tried. This is not working even after adding 'image' to the fields. I get an error.
    # def image(self, obj):
    #     return format_html('<img src="{0}" />'.format(f"/static/fragments/{obj}.png"))

Answer 1

您可以创建一个类似于display_image的方法。

def display_image(self, obj):
    # get image url 
    image_url = '<your_image_url>'
    if image_url is not None:
        return format_html('<img src="{}">', image_url)
    return None

在字段列表中添加'display_image‘

fields = ("label", "in_english", "validated", 'display_image')

然后将此字段设为只读

readonly_fields = ['display_image']