There is a model:

class Categories(models.Model):
name = models.CharField(max_length=150, unique=True, verbose_name='Name')
slug = models.SlugField(max_length=200, unique=True, blank=True, null=True, verbose_name='URL')

class Products(models.Model):
name = models.CharField(max_length=150, unique=True, verbose_name='Name')
slug = models.SlugField(max_length=200, unique=True, blank=True, null=True, verbose_name='URL')
category = models.ForeignKey(to=Categories, on_delete=models.PROTECT, verbose_name='Categoy')

I don’t understand how to make it so that in Products I could write category_id separated by commas. That is, so that one product would have different categories. Are there any separator arguments for Foreignkey? For example, I will show my idea with pseudocode

category = models.ForeignKey(to=Categories, on_delete=models.PROTECT, separator=';')