Only have one instance of the django model

Question

I only need one instance of the model below. How to do this in code?

class Employer(models.Model): name=models.CharField(max_length=50, verbose_name = "Employer Name") pin =models.CharField(max_length=50, verbose_name ="Employer PIN") def __unicode__(self): return self.name 

Answer 1

try the following:

 class Employer(models.Model): name = models.CharField(max_length=50, verbose_name="Employer Name") pin = models.CharField(max_length=50, verbose_name="Employer PIN") def __unicode__(self): return self.name class Meta: unique_together = ('name', 'pin') 

from Django Metadata Options .