在 Match 的 MatchSerializer 搜索 players 属性中实例，但找不到它，您会遇到以下错误：

The MatchSerializer search for a players attribute in Match's instance, but it couldn't find and you get the following error:

AttributeError at /stats/matches

Got AttributeError when attempting to get a value for field players on 
serializer MatchSerializer. The serializer field might be named 
incorrectly and not match any attribute or key on the Match instance. 
Original exception text was: 'Match' object has no attribute 'players'.

在DRF序列化器中，一个名为source的参数将明确告诉在哪里寻找数据。因此，如下更改您的 MatchSerializer ：

In DRF serializer, a parameter called source will tell explicitly where to look for the data. So, change your MatchSerializer as follow:

class MatchSerializer(serializers.ModelSerializer):
    players = PlayerSerializer(many=True, source='player_set')
    class Meta:
        model = Match
        fields = ("mid", "players")

希望有帮助。