I have the following model:

```
from django.db import models

class PopulationData(models.Model):
    slot = models.IntegerField(db_index=True)
    sample = models.IntegerField()
    value = models.FloatField()

    class Meta:
        unique_together = (('slot', 'sample'),)

```

And I would like to create also a compound index on the column pair that have the `UNIQUE` constraint, like so:

```sql
CREATE INDEX my_compound_index ON myapp_populationdata (slot, sample);

```

Right now I have a separate code connected to the `post_syncdb` signal that issues the previous SQL statement. Is there any way to indicate it from the model specification? (Note: I'm using the 1.3 branch).