在 django 内联模板中添加额外的行

Question

我有这些模型和管理模型，如下所示

我希望在交易模型中显示总金额（即金额字段的总和）

Inline 中没有更改列表的方法我该怎么做

class TransactionAdmin(admin.ModelAdmin):
    inlines = [TransactionAmountInline, AmountPaidInline, PhotosInline]
    fields = ('customer', 'title', 'description', 'created_at')
    readonly_fields = ('updated_at',)
    list_display = ('title', 'customer')


class AmountPaidInline(admin.TabularInline):
   model = AmountPaid
   extra = 0


class AmountPaid(models.Model):
     transaction = models.ForeignKey(Transactions)
     description = models.TextField(null=True)
     amount = models.DecimalField(max_digits=19, decimal_places=4)
     created_at = models.DateTimeField(auto_now_add=True)
     updated_at = models.DateTimeField(auto_now=True)

Answer 1

您必须将此函数添加到您的事务模型中。

def sum_amount (self):
    return AmountPaid.objects.filter(transaction=self).aggregate(total=Sum('amount'))['total']

并将函数名添加到模型管理员TransactionAdmin的list_display选项中：

list_display = ('title', 'customer', 'sum_amount')