You can revert by migrating to the previous migration.
For example, if your last two migrations are:
```
0010_previous_migration
0011_migration_to_revert
```
Then you would do:
```
./manage.py migrate my_app 0010_previous_migration
```
You can then delete migration 0011_migration_to_revert.
You can show the names of all the migrations with
```
./manage.py showmigrations my_app
```
To reverse all migrations for an app, you can run:
```
./manage.py migrate my_app zero
```
You can revert by migrating to the previous migration.
For example, if your last two migrations are:
* `0010_previous_migration`
* `0011_migration_to_revert`
Then you would do:
./manage.py migrate my_app 0010_previous_migration
You can then delete migration `0011_migration_to_revert`.
If you're using Django 1.8+, you can show the names of all the migrations with
./manage.py showmigrations my_app
To reverse all migrations for an app, you can run:
./manage.py migrate my_app zero