Error updating unique field

[Kailegh]

Hi, I think I have discovered a bug, if you have a field like the following:
audio_name = models.CharField(blank=False, max_length=255)
and decide to change it to the following one:

audio_name = models.TextField(blank=False)

it generates the following migration code:

operations = [

migrations.AlterModelOptions(

name='s3_bucket_audios',
options={},

),

migrations.AlterField(

model_name='s3_bucket_audios',
name='audio_name',
field=models.TextField(help_text='name of the audio in the s3 bucket'),

),
migrations.AlterUniqueTogether(

name='s3_bucket_audios',
unique_together=set(),

),

]

However it that field was being use in a unique condition:

class Meta:

ordering = [ "audio_name"]
unique_together = ('audio_name')

you get the following error:
django.db.utils.OperationalError: (1170, "BLOB/TEXT column 'audio_name' used in key specification without a key length")

That is because it changes the field type before changing the unique condition, I think the order should be handled automatically, I had to change the code manually to:

operations = [

migrations.AlterModelOptions(

name='s3_bucket_audios',
options={},

),
migrations.AlterUniqueTogether(

name='s3_bucket_audios',
unique_together=set(),

),

migrations.AlterField(

model_name='s3_bucket_audios',
name='audio_name',
field=models.TextField(help_text='name of the audio in the s3 bucket'),

),

]

It is not a big issue anyway...
Thanks a lot for your amazing work!!