Python Django mysql数据库在模板问题中的for循环中显示来自多个表的数据

我有一个老联盟网站的php脚本与mysql数据库从2006年。此脚本不运行取决于旧的php和mysql版本。这就是为什么我试图使用django从mysql数据库获取数据，但我在匹配列表页面上遇到了问题

在数据库中有一个联赛表格。我可以使用django模板系统获取数据和列表，如下所示：

class LeagueMatch(models.Model):
objects = None
idm = models.AutoField(primary_key=True)
league = models.IntegerField()
ids = models.PositiveIntegerField()
judge = models.PositiveIntegerField()
date = models.IntegerField()
idg = models.PositiveIntegerField(blank=True, null=True)
pos = models.IntegerField(blank=True, null=True)
rnd = models.PositiveIntegerField(blank=True, null=True)
idc1 = models.ForeignKey(LeagueClan, on_delete=models.CASCADE, related_name='teama')
idc2 = models.ForeignKey(LeagueClan, on_delete=models.CASCADE, related_name='teamb')
type = models.CharField(max_length=20, blank=True, null=True)
idpt = models.PositiveSmallIntegerField()
points1 = models.IntegerField()
points2 = models.IntegerField()
frags1 = models.SmallIntegerField()
frags2 = models.SmallIntegerField()
win1 = models.PositiveIntegerField()
draw = models.PositiveIntegerField()
win2 = models.PositiveIntegerField()
maps = models.CharField(max_length=70)
scores = models.CharField(max_length=70)
descr = models.TextField()
server = models.CharField(max_length=30)

型号.py

 class LeagueMatch(models.Model):
objects = None
idm = models.AutoField(primary_key=True)
league = models.IntegerField()
ids = models.PositiveIntegerField()
judge = models.PositiveIntegerField()
date = models.IntegerField()
idg = models.PositiveIntegerField(blank=True, null=True)
pos = models.IntegerField(blank=True, null=True)
rnd = models.PositiveIntegerField(blank=True, null=True)
idc1 = models.IntegerField()
idc2 = models.IntegerField()
type = models.CharField(max_length=20, blank=True, null=True)
idpt = models.PositiveSmallIntegerField()
points1 = models.IntegerField()
points2 = models.IntegerField()
frags1 = models.SmallIntegerField()
frags2 = models.SmallIntegerField()
win1 = models.PositiveIntegerField()
draw = models.PositiveIntegerField()
win2 = models.PositiveIntegerField()
maps = models.CharField(max_length=70)
scores = models.CharField(max_length=70)
descr = models.TextField()
server = models.CharField(max_length=30)

def all_matches(request):
match_list = LeagueMatch.objects.all()
return render(request, 'home_match.html',
              {'match_list': match_list})

{% for match in match_list reversed %}
{% if match.league == 1 %}
        <div class="card" >
              <div class="card-body">
                 <h5 class="card-title"><a href="{% url 'match-detail' match.pk %}"> Match  No {{ match.idm }} - Team A ({{ match.idc1 }}) vs Team B ({{ match.idc2 }})</a></h5>
                <p class="card-text"><b>Score : {{ match.win1 }} : {{ match.win2 }}</b></p>
              </div>
        </div>
        </br></br>
{% endif %}

视图.py

 class LeagueMatch(models.Model):
objects = None
idm = models.AutoField(primary_key=True)
league = models.IntegerField()
ids = models.PositiveIntegerField()
judge = models.PositiveIntegerField()
date = models.IntegerField()
idg = models.PositiveIntegerField(blank=True, null=True)
pos = models.IntegerField(blank=True, null=True)
rnd = models.PositiveIntegerField(blank=True, null=True)
idc1 = models.IntegerField()
idc2 = models.IntegerField()
type = models.CharField(max_length=20, blank=True, null=True)
idpt = models.PositiveSmallIntegerField()
points1 = models.IntegerField()
points2 = models.IntegerField()
frags1 = models.SmallIntegerField()
frags2 = models.SmallIntegerField()
win1 = models.PositiveIntegerField()
draw = models.PositiveIntegerField()
win2 = models.PositiveIntegerField()
maps = models.CharField(max_length=70)
scores = models.CharField(max_length=70)
descr = models.TextField()
server = models.CharField(max_length=30)

def all_matches(request):
match_list = LeagueMatch.objects.all()
return render(request, 'home_match.html',
              {'match_list': match_list})

{% for match in match_list reversed %}
{% if match.league == 1 %}
        <div class="card" >
              <div class="card-body">
                 <h5 class="card-title"><a href="{% url 'match-detail' match.pk %}"> Match  No {{ match.idm }} - Team A ({{ match.idc1 }}) vs Team B ({{ match.idc2 }})</a></h5>
                <p class="card-text"><b>Score : {{ match.win1 }} : {{ match.win2 }}</b></p>
              </div>
        </div>
        </br></br>
{% endif %}

这是可以的，但球队名称不在同一张表中（联赛），只有球队编号（idc1和idc2）。球队名称存储在另一个表中，名称为league_clan。我想显示所有匹配项列表，如下所示：

class LeagueMatch(models.Model):
objects = None
idm = models.AutoField(primary_key=True)
league = models.IntegerField()
ids = models.PositiveIntegerField()
judge = models.PositiveIntegerField()
date = models.IntegerField()
idg = models.PositiveIntegerField(blank=True, null=True)
pos = models.IntegerField(blank=True, null=True)
rnd = models.PositiveIntegerField(blank=True, null=True)
idc1 = models.ForeignKey(LeagueClan, on_delete=models.CASCADE, related_name='teama')
idc2 = models.ForeignKey(LeagueClan, on_delete=models.CASCADE, related_name='teamb')
type = models.CharField(max_length=20, blank=True, null=True)
idpt = models.PositiveSmallIntegerField()
points1 = models.IntegerField()
points2 = models.IntegerField()
frags1 = models.SmallIntegerField()
frags2 = models.SmallIntegerField()
win1 = models.PositiveIntegerField()
draw = models.PositiveIntegerField()
win2 = models.PositiveIntegerField()
maps = models.CharField(max_length=70)
scores = models.CharField(max_length=70)
descr = models.TextField()
server = models.CharField(max_length=30)

我的意思是idc1==9，我们将从另一个表中获取数据，9号团队的名称和显示。如何为此显示器编写模型或模板代码？在{%for%}代码中我无法做到这一点。出了点问题，需要帮助。我希望你能解释一下，谢谢

---

将idc1和idc2从integerfield转换为ForeignKey field，然后您可以通过{match.idc1.name}获得名称，如果速度变慢，您可以使用select_related。

您好，谢谢，但出现如下错误：

class LeagueMatch(models.Model):
objects = None
idm = models.AutoField(primary_key=True)
league = models.IntegerField()
ids = models.PositiveIntegerField()
judge = models.PositiveIntegerField()
date = models.IntegerField()
idg = models.PositiveIntegerField(blank=True, null=True)
pos = models.IntegerField(blank=True, null=True)
rnd = models.PositiveIntegerField(blank=True, null=True)
idc1 = models.ForeignKey(LeagueClan, on_delete=models.CASCADE, related_name='teama')
idc2 = models.ForeignKey(LeagueClan, on_delete=models.CASCADE, related_name='teamb')
type = models.CharField(max_length=20, blank=True, null=True)
idpt = models.PositiveSmallIntegerField()
points1 = models.IntegerField()
points2 = models.IntegerField()
frags1 = models.SmallIntegerField()
frags2 = models.SmallIntegerField()
win1 = models.PositiveIntegerField()
draw = models.PositiveIntegerField()
win2 = models.PositiveIntegerField()
maps = models.CharField(max_length=70)
scores = models.CharField(max_length=70)
descr = models.TextField()
server = models.CharField(max_length=30)

在/匹配处出现操作错误/

（1054，“字段列表”中的未知列'league_match.idc1_id'）

请求方法：获取 请求URL:http://localhost:8000/matches/ Django版本：3.2.2 异常类型：操作错误 异常值：

（1054，“字段列表”中的未知列'league_match.idc1_id'）

异常位置：/home/tolga/.local/lib/python3.8/site-packages/MySQLdb/connections.py，查询中的第259行 Python可执行文件：/usr/bin/python3 Python版本：3.8.5 Python路径：

['/home/tolga/q2ligi2006'， “/usr/lib/python38.zip”， “/usr/lib/python3.8”， “/usr/lib/python3.8/lib dynload”， “/home/tolga/.local/lib/python3.8/site packages”， “/usr/local/lib/python3.8/dist包”， “/usr/lib/python3/dist包”]

服务器时间：2021年6月3日星期四09:16:13+0000

我使用ForeignKey字段更新了模型，如下所示：

class LeagueMatch(models.Model):
objects = None
idm = models.AutoField(primary_key=True)
league = models.IntegerField()
ids = models.PositiveIntegerField()
judge = models.PositiveIntegerField()
date = models.IntegerField()
idg = models.PositiveIntegerField(blank=True, null=True)
pos = models.IntegerField(blank=True, null=True)
rnd = models.PositiveIntegerField(blank=True, null=True)
idc1 = models.ForeignKey(LeagueClan, on_delete=models.CASCADE, related_name='teama')
idc2 = models.ForeignKey(LeagueClan, on_delete=models.CASCADE, related_name='teamb')
type = models.CharField(max_length=20, blank=True, null=True)
idpt = models.PositiveSmallIntegerField()
points1 = models.IntegerField()
points2 = models.IntegerField()
frags1 = models.SmallIntegerField()
frags2 = models.SmallIntegerField()
win1 = models.PositiveIntegerField()
draw = models.PositiveIntegerField()
win2 = models.PositiveIntegerField()
maps = models.CharField(max_length=70)
scores = models.CharField(max_length=70)
descr = models.TextField()
server = models.CharField(max_length=30)

怎么了，谢谢