Django models avoid duplicates

Question

In models:

class Getdata(models.Model):
    title = models.CharField(max_length=255)
    state = models.CharField(max_length=2, choices=STATE, default=\"0\")         


        

Answer 1

If an individual field needs to be unique, then you just add unique=True:

class Getdata(models.Model):
    title = models.CharField(max_length=255, unique=True)
    state = models.CharField(max_length=2, choices=STATE, default="0")
    name = models.ForeignKey(School)
    created_by = models.ForeignKey(profile)

If you want a combination of fields to be unique, you need unique_together:

class Getdata(models.Model):
    title = models.CharField(max_length=255)
    state = models.CharField(max_length=2, choices=STATE, default="0")
    name = models.ForeignKey(School)
    created_by = models.ForeignKey(profile)
    class Meta:
        unique_together = ["title", "state", "name"]