Model.create() doesn't set id field for BigIntegerField primary key
Thanks glad you like the library!

Unfortunately, peewee's `PrimaryKeyField` is the only field that will handle auto-incrementing primary keys.  If you want to use the BigIntegerField as an auto-incrementing primary key you will need to create a custom field type (probably by subclassing `PrimaryKeyField`):

http://peewee.readthedocs.org/en/latest/peewee/models.html#creating-a-custom-field

However this technique will not work with SQLite, which looks for columns typed "INTEGER PRIMARY KEY" and will use these columns to replace the native `rowid`: http://www.sqlite.org/autoinc.html  -- Since the column we'd be adding would be BIGINT PRIMARY KEY Sqlite does not seem to auto-generate the ID (tested this locally).

Also, I'm also pretty sure that SQLite does not actually treat bigint any different than a regular integer.

This looks like it has some info on the topic: http://sqlite.1065341.n5.nabble.com/Impossible-to-declare-field-type-BIGINT-PRIMARY-KEY-td44651.html

If you are using something like Postgresql, you _can_ use a bigint, but you will need to create and specify a sequence to use to auto-generate the IDs.  Postgres will auto-create the sequence for `serial` columns, but if you use a bigint you will need to create the sequence by hand.

Hi! Peewee is awesome lib! :)

It sees there's an issue with BigIntegerField as primary key.

I define my model like that:

```
import peewee
db = peewee.SqliteDatabase('test.db')
class User(peewee.Model):
    id = peewee.BigIntegerField(primary_key=True)
    token = peewee.CharField(max_length=100, default='')
    class Meta:
        database = db
```

Then I test create method:

```
>>> User.create_table()
>>> user = User.create(token="123")
>>> user.id
>>> 
>>> user = User.get(token="123")
>>> user.id
1
```

Instantiating `User(token="123")` and then `save()` results the same.

If I remove line `id = peewee.BigIntegerField(primary_key=True)` everything works fine. I've used Python 3.3.1, may be it's only py3 issue, not sure about that.
