Question

如何修改以下模型，以便每个企业仅允许每种类型的一个社交媒体链接：

class Business(models.Model):
    business = models.CharField(max_length=60)

class SocialLinkType(models.Model):
    FB = 'FB'
    TWTR = 'TWTR'
    PIN = 'PIN'
    INST = 'INST'
    MEMBERSHIP_CHOICES = (
        (FB, 'Facebook'),
        (TWTR, 'Twitter'),
        (PIN, 'Pinterest'),
        (INST, 'Instagram'),
    )
    business = models.ManyToManyField(Business) 

class SocialLink(models.Model):
    link_url = models.TextField()
    link_type = models.ForeignKey(SocialLinkType, on_delete=models.CASCADE)
    business = models.ForeignKey(Business, on_delete=models.CASCADE)

Answer 1

在sociallinktype模型中，添加Facebook，Twitter，...等名称。

class SocialLinkType(models.Model):
    name = models.CharField(max_length=20)

在sociallink模型中，添加unique_together以确保每个公司只有一个facebook链接...。

class SocialLink(models.Model):
    link_url = models.TextField()
    business = models.ForeignKey(Business, on_delete=models.CASCADE)
    link_type = models.ForeignKey(SocialLinkType, on_delete=models.CASCADE)

    class Meta:
        unique_together = ['business', 'link_type']

Django模型-特定于企业的链接类型，每个企业仅一种链接类型？

1 个答案: