Python 正在尝试引用外键字段…为什么它还显示被引用表的名称？

我正在尝试显示模板中的数据。我遇到的问题是

BattingStats

表中的外键，该表引用了

PlayerInfo

表的

playerid

。当我让它显示时，该字段的数据会显示出来，但它被括在括号中，前面是

ReferencedTable对象

。所以对我来说，它看起来像是

PlayerInfo对象（smithjo05）

。它为什么要这样做？我如何让它只显示

播放器ID

？感谢您的帮助。谢谢

观点

模型

class BattingStats(models.Model):
    id = models.IntegerField(db_column='ID', primary_key=True)
    playerid = models.ForeignKey('PlayerInfo', models.DO_NOTHING, db_column='playerID', blank=True, null=True)
    player = models.CharField(db_column='Player', max_length=255, blank=True, null=True)
    hr = models.IntegerField(db_column='HR', blank=True, null=True)
    rbi = models.IntegerField(db_column='RBI', blank=True, null=True)
    ba = models.FloatField(db_column='BA', blank=True, null=True)

class PlayerInfo(models.Model):
    playerid = models.CharField(db_column='playerID', primary_key=True, max_length=255)
    namefirst = models.CharField(db_column='nameFirst', max_length=255, blank=True, null=True)
    namelast = models.CharField(db_column='nameLast', max_length=255, blank=True, null=True)
    height = models.IntegerField(blank=True, null=True)
    debut = models.CharField(max_length=255, blank=True, null=True)
    finalgame = models.CharField(db_column='finalGame', max_length=255, blank=True, null=True)

HTML

您只需将方法添加到

PlayerInfo

模型：

class PlayerInfo(models.Model):
    playerid = models.CharField(db_column='playerID', primary_key=True, max_length=255)
    namefirst = models.CharField(db_column='nameFirst', max_length=255, blank=True, null=True)
    namelast = models.CharField(db_column='nameLast', max_length=255, blank=True, null=True)
    height = models.IntegerField(blank=True, null=True)
    debut = models.CharField(max_length=255, blank=True, null=True)
    finalgame = models.CharField(db_column='finalGame', max_length=255, blank=True, null=True)

    def __str__(self):
        return self.playerid

这允许在将实例转换为字符串（例如在模板中）时更改其默认表示形式

            {% for index in playerstats %}
                <td>{{ index.playerid }}</td>
                <td>{{ index.year}}</td>
                <td>{{ index.age}}</td>
                <td>{{ index.team}}</td>
                <td>{{ index.league}}</td>
            {% endfor %}

{% for index in playerstats %}
    {{ index.playerid }}
{% endfor %}

PlayerInfo object (smithjo05) 
PlayerInfo object (cruzne02)  
PlayerInfo object (jonesad01)

class PlayerInfo(models.Model):
    playerid = models.CharField(db_column='playerID', primary_key=True, max_length=255)
    namefirst = models.CharField(db_column='nameFirst', max_length=255, blank=True, null=True)
    namelast = models.CharField(db_column='nameLast', max_length=255, blank=True, null=True)
    height = models.IntegerField(blank=True, null=True)
    debut = models.CharField(max_length=255, blank=True, null=True)
    finalgame = models.CharField(db_column='finalGame', max_length=255, blank=True, null=True)

    def __str__(self):
        return self.playerid