Allow empty strings of blank=True model fields to pass unique_together constraint

[Spleeding1]

I've been researching this one a little, and this is what I found: ​https://stackoverflow.com/questions/454436/unique-fields-that-allow-nulls-in-django

Here is what I am trying to accomplish:

class MyModel(models.Model):
    my_foreignkey = models.ForeignKey(
        'ForeignKeyModel',
        on_delete=models.CASCADE
    )
    my_charfield = models.CharField(
        'My Field',
        max_length=100,
        blank=True
    )
    field = models.CharField(
        max_length=100
    )
    
    class Meta:
        unique_together = ('my_foreignkey', 'my_charfield')
        

FOREIGN_KEY = ForeignKeyModel.objects.get(id=1)
        
MyModel.objects.create(
    my_foreignkey=FOREIGN_KEY,
    field='Field 1',
    my_charfield=''
)

# This raises unique_together error.
MyModel.objects.create(
    my_foreignkey=FOREIGN_KEY,
    field='Field 2',
    my_charfield=''
)

It does appear as though there is enough interest in the issue. Is this unrealistic?

[Tim Graham]

A solution would require Django to change input data from empty strings to nulls. This would be backwards incompatible and often undesired. See ​stackoverflow for possible solutions you can implement for the use case.