Question

我有一个非常简单的django模型：

class Car(models.Model):
   carname = models.CharField(max_length=100)
   carmodel = models.CharField(max_length=100)
   carcountry = models.CharField(max_length=100)
   caryear = models.CharField(max_length=100)
       cardesc = models.TextField()

以及显示所有记录的admin.py：

class UserForm(forms.ModelForm):
    cardesc = forms.CharField(widget=forms.Textarea(attrs={'cols': 120, 'rows': 20}))

class Meta:
    model = Cars


  class ModelAdmin(admin.ModelAdmin ):
     form = UserForm



  admin.site.register(Cars,ModelAdmin)

它工作正常。现在，我的问题是：我想要一个下拉列表，我可以选择汽车模型，然后根据我的选择过滤我的结果...

我怎么能这样做？我要编辑Admin.py文件？ Django有内置功能吗？或者我必须创建一个HTML模板？怎么样？请帮帮我。

Answer 1

试试这个。

class CustomForm(forms.ModelForm):

    class Meta:
        model = Cars

    cars_list = Cars.objects.values_list('carmodel', flat=True).order_by('carmodel').distinct()
    choice_list = []
    for car in cars_list:
        choice_list.append((car,car,)) 
    CAR_CHOICES = choice_list

    #Used 'ChoiceField' as you want dropdown list for carmodels stored in text fields 
    carmodel = forms.ChoiceField(widget=forms.Select, choices=CAR_CHOICES)

class CarsModelAdmin(model.ModelAdmin):
    form = CustomForm
    list_filter = ['carmodel']

admin.site.register(Cars,CarsModelAdmin)

Answer 2

您必须添加

list_filter = ['carmodel', ]

到ModelAdmin类。

Answer 3

来自documentation：

ModelAdmin.formfield_for_foreignkey(db_field, request, **kwargs)¶
ModelAdmin上的formfield_for_foreignkey方法允许您覆盖外键字段的默认表单字段。例如，要根据用户返回此外键字段的对象子集：
class MyModelAdmin(admin.ModelAdmin):
    def formfield_for_foreignkey(self, db_field, request, **kwargs):
        if db_field.name == "car":
            kwargs["queryset"] = Car.objects.filter(owner=request.user)
        return super(MyModelAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)
这使用HttpRequest实例过滤Car外键字段，仅显示User实例拥有的汽车。

过滤django admin下拉列表中的字段

3 个答案: