pascalh1011/migrant — Issue #13: Existing Polymorphic columns get deleted
Author: KieranP
Created: 2011-11-24 22:15:26+00:00
State: open

```
class Activity
belongs_to :target, :polymorphic => true
end
```

results in:

```
> Activity: 'target_id' is no longer in use. [(D)estroy / (I)gnore]: I
> Activity: 'target_type' is no longer in use. [(D)estroy / (I)gnore]: I
```

when clearly it should not.