Django 管理自定义验证 - 需要至少一个内联外键模型

发布于 2024-11-04 18:50:12 字数 851 浏览 3 评论 0原文

我有两个 Django 模型（Purchaser 和 LineItem），我通过库存管理界面进行管理。简化版本：

class Purchaser(models.Model):
    firstname = models.CharField('First Name', max_length = 30)
    lastname = models.CharField('Last Name', max_length = 30)
    paymentid = models.IntegerField('Payment ID', unique = True)

class LineItem(models.Model):
    purchaser = models.ForeignKey(Purchaser)
    ship_first_name = models.CharField('Recipient First Name', max_length = 50)
    ship_last_name = models.CharField('Recipient Last Name', max_length = 50)

我将 LineItems 作为购买者管理页面中的内联项，并希望要求购买者至少有一个 LineItem（即，不允许用户保存新的购买者，除非他们添加了至少一个 LineItem）。有没有一种干净的方法来做到这一点？我已经使用自定义设置了一些验证modelForm，但该方法仅处理 Buyer 字段，与 LineItems 无关。建议？

原文

I have two Django models (Purchaser and LineItem) that I manage via the stock admin interface. The dumbed-down versions:

class Purchaser(models.Model):
    firstname = models.CharField('First Name', max_length = 30)
    lastname = models.CharField('Last Name', max_length = 30)
    paymentid = models.IntegerField('Payment ID', unique = True)

class LineItem(models.Model):
    purchaser = models.ForeignKey(Purchaser)
    ship_first_name = models.CharField('Recipient First Name', max_length = 50)
    ship_last_name = models.CharField('Recipient Last Name', max_length = 50)

I have LineItems as an inline within the Purchaser admin page, and want to require that Purchasers have at least one LineItem (i.e. not let the user save a new Purchaser unless they have added at least one LineItem). Is there a clean way to do this? I already have some validation set up using a custom modelForm, but that method only deals with Purchaser fields, and not anything to do with LineItems. Advice?

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