加入 Django 模型

Question

我想在 Django 中使用三种不同的模型在一个列表中获得结果。我如何申请加入三个模型。

class CurrentDomainChecks(models.Model):

    domain = models.ForeignKey(Domains)
    check_type = models.ForeignKey(CheckType)
    check_date = models.DateTimeField(auto_now_add = True, primary_key=True)
    check_value = models.CharField(_('check value'), max_length = 2048)
    check_passed = models.BooleanField(default = False)

class DomainStatus(models.Model):

    domain = models.ForeignKey(Domains)
    domain_status_date = models.DateTimeField(auto_now_add=True,null = True, blank = True)
    domain_status = models.IntegerField(null = True, blank = True)

class Domains(models.Model):

    domain_name = models.CharField(_('domain name'), max_length = 255, unique = True)
    verified = models.BooleanField(default = False)
    user = models.ForeignKey(User)
    date_added = models.DateTimeField(auto_now_add=True,null = True, blank = True)
    date_last_changed = models.DateTimeField(auto_now=True,null = True, blank = True)
    monitoring_frequency = models.CharField(_('monitoring frequency'), max_length = 20,blank = True,null = True)

    def __unicode__(self):
        return self.domain_name 

Answer 1

你读过这篇关于 JOIN 的文章吗？

Django：使用 Django ORM 实现 JOIN？