old_contents: from django.db import models
  
  # Create your models here.
  
new_contents: from django.db import models
  
  from wrestlers.models import WrestlingEntity
  
  
  class Card(models.Model):
  
      date = models.DateField()
  
  
  class Match(models.Model):
  
      card = models.ForeignKey(Card)
      participants = models.ManyToManyField(WrestlingEntity)
      winner = models.ForeignKey(WrestlingEntity, related_name="won_matches",
                                 null=True)
  
subject: Add matches models.