django - 在保存时在 Django 的管理面板中操作数据

Question

好的，这是瘦的：

# models.py
class Article( models.Model ):
    title           = models.CharField( max_length = 255 )
    author          = models.ForeignKey( User )
    published_at    = models.DateTimeField( auto_now_add = True )
    body            = models.TextField( )

    def __unicode__( self ):
        return self.title

# admin.py
from hpccoe.news.models import Article
from django.contrib import admin
from django import forms
from django.forms import widgets

class ArticleAdminForm( forms.ModelForm ):    
    title   = forms.CharField( max_length = 255, required = True )
    body    = forms.CharField( required = True, widget = widgets.Textarea )

class ArticleAdmin( admin.ModelAdmin ):
    fields  = [ 'title', 'body' ]
    form    = ArticleAdminForm

admin.site.register( Article, ArticleAdmin )

如您所见，我在管理员表单中省略了作者字段。我想以某种方式在保存之前自动填充它。我该如何做到这一点？最近一个小时我一直在谷歌上，但无济于事。

提前致谢。

Answer 1

来自Django 文档：

ModelAdmin.save_model(self, request, obj, form, change)

该save_model方法被赋予HttpRequest模型实例、ModelForm实例和布尔值，具体取决于它是添加还是更改对象。在这里您可以进行任何保存前或保存后的操作。

例如request.user在保存之前附加到对象：

from django.contrib import admin

class ArticleAdmin(admin.ModelAdmin):
    def save_model(self, request, obj, form, change):
        obj.user = request.user
        super().save_model(request, obj, form, change)

Answer 2

class ArticleAdmin( admin.ModelAdmin ):
    fields  = [ 'title', 'body' ]
    form    = ArticleAdminForm

    def save_model(self, request, obj, form, change):
         obj.author = "name Here"
         obj.save()