Checking if an object exists in a Django database?

Question

Django

there is a model:

class Music(models.Model):
    artist_mane = models.CharField(max_length=50)
    track_name = models.CharField(max_length=50)
    url = models.CharField(max_length=200)

objects of this class are created in a cycle, how to check for the presence of completely identical fields?

Answer 1

If you should not have duplicates in the database for these fields, use https://docs.djangoproject.com/en/1.9/ref/models/o...
If, in addition to this, you just want to create only what is not there:
https: //docs.djangoproject.com/en/1.9/ref/models/q...
If you want something that is not created, and the rest is updated:
https://docs.djangoproject.com/en/1.9/ref/models/ q...
ZY, One has only to take into account that there is no "magic" here, and to check the existence of objects, janga will get into the database.

Answer 2

djbook.ru/rel1.4/ref/models/options.html#unique-to...
or rewrite the save method, which will look for the added string before saving