Question

我希望company_name时unique=True是company_is_deleted=False。同样，当company_is_deleted=True时，company_name将成为unique=False。我在使用软删除的地方意味着我只是设置company_is_deleted=True而不是从数据库表中删除它。

公司型号

class Company(models.Model):
    company_name = models.CharField(max_length=20, unique=True) # Here
    company_description = models.CharField(max_length=100)
    company_address = models.CharField(max_length=100)
    company_email = models.EmailField()
    company_website = models.URLField()
    company_phone = models.CharField(max_length=30)
    company_monthly_payment = models.DecimalField(max_digits=5, decimal_places=2)
    company_logo = models.ImageField(upload_to='company_logo', default='default_company.png',blank=True, null=True)
    company_created = models.DateTimeField(auto_now_add=True)
    company_is_deleted = models.BooleanField(default=False)

View.py

class CompanyCreateView(LoginRequiredMixin, generic.CreateView):
    model = Company
    fields = ['company_name', 'company_description', 'company_email', 
    'company_website', 'company_address', 'company_phone', 'company_status', 
    'company_monthly_payment', 'company_logo']

Answer 1

您可以将该逻辑添加到save方法中。但请从unique字段中删除company_name。

from django.db import IntegrityError


class Company(models.Model):
    company_name = models.CharField(max_length=20)
    company_description = models.CharField(max_length=100)
    company_address = models.CharField(max_length=100)
    company_email = models.EmailField()
    company_website = models.URLField()
    company_phone = models.CharField(max_length=30)
    company_monthly_payment = models.DecimalField(max_digits=5, decimal_places=2)
    company_logo = models.ImageField(upload_to='company_logo', default='default_company.png',blank=True, null=True)
    company_created = models.DateTimeField(auto_now_add=True)
    company_is_deleted = models.BooleanField(default=False)

    def save(self, *args, **kwargs):
        if not self.company_is_deleted and Company.objects.filter(
            company_name=self.company_name, 
            company_is_deleted=False
        ).exists():
            raise IntegrityError    
        super(Company, self).save(*args, **kwargs)

Django模型中的条件

1 个答案: