ft_transcendence/tournament/serializers.py

from rest_framework import serializers
from .models import TournamentModel

class TournamentSerializer(serializers.ModelSerializer):

	levels = serializers.SerializerMethodField(read_only=True, required=False)
	level = serializers.ReadOnlyField()
	started = serializers.ReadOnlyField()
	finished = serializers.ReadOnlyField()

	class Meta:
		model = TournamentModel
		fields = ["name", "nb_players", "nb_players_by_game", "level", "started", "finished", "levels", "id"]

	def get_levels(self, instance):
		levels: [[int]] = []
		for i in range(instance.level):
			level: [int] = instance.get_games_id_by_level(i)
			if (level == []):
				break
			levels.append(level)
		return levels