Foreign key missing from migrations

Question

I have the model trade/ Trade .py:

from datetime import datetime
from django.db import models
from home.models import Player


class Trade(models.Model):
    buyer = models.ForeignKey(Player, on_delete=models.CASCADE, related_name='buyer'),
    buyee = models.ForeignKey(Player, on_delete=models.CASCADE, related_name='buyee'),
    date = models.DateTimeField(default=datetime.now)

Model home/ Player .py:

from django.contrib.auth.models import User
from django.db import models
class Player(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE, primary_key=True, related_name='user')
    value = models.IntegerField(default=1500)
    owner = models.OneToOneField(User, on_delete=models.CASCADE, related_name='owner', blank=True, null=True)

A Trade happens between 2 Player s. That is, the buyer and buyee fields in Trade are foreign keys to Player .

Now, when I make migrations for the Trade model, this is what I get:

class Migration(migrations.Migration):

    initial = True

    dependencies = [
    ]

    operations = [
        migrations.CreateModel(
            name='Trade',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('date', models.DateTimeField(default=datetime.datetime.now)),
            ],
        ),
    ]

Why are the 2 foreign key fields missing from the migration?

Answer 1

This happened due to the comma at the end of each field in the Trade class. Remove the commas and it will work.

class Trade(models.Model):
    buyer = models.ForeignKey(Player, on_delete=models.CASCADE, related_name='buyer')
    buyee = models.ForeignKey(Player, on_delete=models.CASCADE, related_name='buyee')
    date = models.DateTimeField(default=datetime.now)