如何覆盖Django管理员更改表单中的字段值显示 [英] How to override field value display in Django admin change form

问题描述

我想覆盖Django管理员中显示的字段值。该字段包含XML，并且在管理员中查看它时，我想要漂亮的格式化它以便于阅读。我知道如何对现场本身的读写进行重新格式化，但这不是我想要做的。我想要将XML存储的空格删除，我只想在管理员更改表单中查看时重新格式化。

I am wanting to override the value that is displayed for a field in the Django admin. The field contains XML and when viewing it in the admin I want to pretty-format it for easy readability. I know how to do reformatting on read and write of the field itself, but this is not what I want to do. I want the XML stored with whitespace stripped and I only want to reformat it when it is viewed in the admin change form.

所以我的问题是，我如何控制值显示在该字段的管理员更改表单的文本区域中

So my question is, how can I control the value displayed in the textarea of the admin change form for this field?

推荐答案

class MyModelForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(MyModelForm, self).__init__(*args, **kwargs)
        self.initial['some_field'] = some_encoding_method(self.instance.some_field)

class MyModelAdmin(admin.ModelAdmin):
    form = MyModelForm
    ...

其中， some_encoding_method 将是您设置确定间距/缩进或您借用的其他第三方功能。但是，如果您编写自己的方法，最好将其放在模型本身，然后通过实例调用：

Where, some_encoding_method would be something you've set up to determine the spacing/indentation or some other 3rd-party functionality you're borrowing on. However, if you write your own method, it would be better to put it on the model, itself, and then call it through the instance:

class MyModel(models.Model):
    ...
    def encode_some_field(self):
        # do something with self.some_field
        return encoded_some_field

然后：

self.instance.encode_some_field()

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