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How to auto generate slug from my Album model in django 2.0.4

I have an Album field with a list of Songs 

 class Album(models.Model):
    artist = models.CharField(max_length=250)
    album_title = models.CharField(max_length=250)
    genre = models.CharField(max_length=100)
    album_logo = models.CharField(max_length=1000,blank=True)
    slug = models.SlugField(unique=True)

    def __str__(self):
        return self.album_title               

class Song(models.Model):
    album = models.ForeignKey(Album, on_delete=models.CASCADE)
    artist = models.CharField(max_length=250, blank=True)
    file_type = models.CharField(max_length=10)
    song_title = models.CharField(max_length=100)    

    def __str__(self):
        return self.artist

I would like to know how to generate slugs from the album title. I am following a tutorial which is using django 1.8 which uses regular expressions to implement this task. But from looking through the documentation they have introduced a more simpler approach (”). So can you help explain how I can implement it for a beginner to understand not only in this context but if possible across board. Thanks in advance.

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Answer

Django autogenerates the slug from the string object you pass to the slug field.

# Import slugify to generate slugs from strings
from django.utils.text import slugify 

class Album(models.Model):
    artist = models.CharField(max_length=250)
    album_title = models.CharField(max_length=250)
    genre = models.CharField(max_length=100)
    album_logo = models.CharField(max_length=1000,blank=True)
    slug = models.SlugField(unique=True)

    def save(self, *args, **kwargs):
        self.slug = slugify(self.album_title)
        super(Album, self).save(*args, **kwargs)

    def __str__(self):
        return self.album_title    


class Song(models.Model):
    album = models.ForeignKey(Album, on_delete=models.CASCADE)
    artist = models.CharField(max_length=250, blank=True)
    file_type = models.CharField(max_length=10)
    song_title = models.CharField(max_length=100)
    slug = models.SlugField(max_length=100, unique=True)

    def save(self, *args, **kwargs):
        self.slug = slugify(self.song_title)
        super(Song, self).save(*args, **kwargs)    

    def __str__(self):
        return self.artist
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