Question

许多玩具具有相同的信息（例如描述和价格）我如何自定义我的admin.py以获取最后保存的对象值，每次当我在管理面板中添加新玩具并在我的输入字段中显示它们时。

models.py

TransformPattern pattern = (TransformPattern)element.GetCurrentPattern(TransformPattern.Pattern);
if (pattern.Current.CanResize)
{
    pattern.Resize(700, 700);  
}

admin.py

class Toy(models.Model):
name = models.CharField(max_length=255)
description = TextField()
quantity = models.FloatField(default=0.0)
price = models.FloatField()

def __unicode__(self):
    return self.name

Answer 1

尝试这样做：

首先在admin.py中创建一个表单：

class ToyForm(forms.ModelForm):
    class Meta:
        model = Toy
        fields = ('__all__')

    def __init__(self, *args, **kwargs):
        #if not an edit
        if 'instance' not in kwargs:
            #we get the last object
            last_object = Toy.objects.all().order_by("id")[0]
            #we add the last object informations to the initial data
            initial = {'description': last_object.description, 'price': last_object.price}
            kwargs['initial'] = initial
        super(ToyForm, self).__init__(*args, **kwargs)

然后将此表单添加到Admin模型：

class ToyAdmin(admin.ModelAdmin):
    form = ToyForm

Fianally：

admin.site.register(ToyAdmin, Toy)

Answer 2

在modeladmin类中有一个方法get_form，你可以覆盖要返回的方法，从条件查询集结果返回的值（Mymodel.objects.last（））

from django.contrib import admin
@admin.register(Toy)
class ToyAdmin(admin.ModelAdmin):
    def get_form(self, request, obj=None, **kwargs):
        form = super(ToyAdmin, self).get_form(request, obj, **kwargs)
        # code logic to check condition & queryset like Toy.objects.last()
        form.base_fields['name'].initial = 'value'
        return form

在Django管理面板中获取最新保存的对象值

2 个答案: