Can't understand how pull data from joins

So I have two tables:

fighters

        id               SERIAL PRIMARY KEY,
        left_fighter     text,
        right_fighter    text

timestamp

        id          SERIAL PRIMARY KEY,
        timestamp   text,
        daytime     time

Code

class BaseModel(Model):
    class Meta:
        database = db


class Fighter(BaseModel):
    id = PrimaryKeyField(null=False)
    left_fighter = CharField()
    right_fighter = CharField()

    class Meta:
        table_name = 'fighters'


class Timestamp(BaseModel):
    id = PrimaryKeyField(null=False)
    timestamp = TimestampField()
    daytime = TimeField()

    table_name = 'timestamp'


fighter = (Fighter.select().join(
    Timestamp, on=(Fighter.id == Timestamp.id)).first())

print(fighter.__dict__)

Output:

{'__data__': {'id': 201322952, 'left_fighter': 'Кенши', 'right_fighter': 'Лю Кенг'}, '_dirty': set(), '__rel__': {}}

Question

So I see there is data from first table, but I can’t understand how to pull second table data.

[coleifer]

The behavior is what it is, as Peewee does not handle nesting or relationship-traversal when using the dicts/namedtuples/tuples methods. You can explicitly alias Timestamp.id in the .select() call if you wish, but you need to then explicitly specify all the columns on Timestamp which you intend to select.

[karambaq]

@coleifer Oh, let me show that:

    games = (Fighter.select(Fighter, Timestamp).
             join(Timestamp, on=(Fighter.id == Timestamp.id))
             )
    print(games[0].timestamp.timestamp) # This prints fine
    for g in games.namedtuples(): # There is an error
        print(g)

Traceback:

 File "/usr/local/lib/python3.7/site-packages/peewee.py", line 4127, in next
    self.cursor_wrapper.iterate()
  File "/usr/local/lib/python3.7/site-packages/peewee.py", line 4043, in iterate
    self.initialize()  # Lazy initialization.
  File "/usr/local/lib/python3.7/site-packages/peewee.py", line 7065, in initialize
    self.tuple_class = collections.namedtuple('Row', attributes)
  File "/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/lib/python3.7/collections/__init__.py", line 373, in namedtuple
    raise ValueError(f'Encountered duplicate field name: {name!r}')
ValueError: Encountered duplicate field name: 'id'

Is it ok? If yes can you please explain it to me?

UPD: I’m not so good in database architecture, id fields are inserting manually, they not auto-generated, there is one-to-one relationship, should I make id column in the second table as foreign key?

UPD2: When I’m using games.dicts() instead of games.namedtuples() it works just as expected.