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from django.db import models
from django.contrib.auth.models import User
# Create your models here.
class Like(models.Model):
LIKE = 'like'
DISLIKE = 'dislike'
ACTION_CHOICES = [(LIKE, 'Like'), (DISLIKE, 'Dislike')]
from_user = models.ForeignKey(
User, on_delete=models.CASCADE, related_name='likes_sent')
to_user = models.ForeignKey(
User, on_delete=models.CASCADE, related_name='likes_received')
action = models.CharField(
max_length=10, choices=ACTION_CHOICES, default=LIKE)
created_at = models.DateTimeField(auto_now_add=True)
class Meta:
unique_together = ('from_user', 'to_user')
indexes = [
models.Index(fields=['from_user', 'to_user']),
models.Index(fields=['from_user', 'action']),
models.Index(fields=['to_user', 'action']),
]
def __str__(self):
return f"{self.from_user.username} {self.action}s {self.to_user.username}" # noqa: E501
def save(self, *args, **kwargs):
if self.from_user == self.to_user:
raise ValueError("Users cannot like themselves")
super().save(*args, **kwargs)
class Match(models.Model):
user1 = models.ForeignKey(
User, on_delete=models.CASCADE, related_name='matches_as_user1')
user2 = models.ForeignKey(
User, on_delete=models.CASCADE, related_name='matches_as_user2')
created_at = models.DateTimeField(auto_now_add=True)
is_active = models.BooleanField(default=True)
class Meta:
unique_together = ['user1', 'user2']
ordering = ['-created_at']
indexes = [models.Index(fields=['user1', 'user2'])]
def __str__(self):
return f"Match: {self.user1.username} & {self.user2.username}"
def save(self, *args, **kwargs):
# keep ordering stable to enforce uniqueness
if self.user1_id and self.user2_id and self.user1_id > self.user2_id:
self.user1, self.user2 = self.user2, self.user1
super().save(*args, **kwargs)
def get_other_user(self, user):
return self.user2 if user == self.user1 else self.user1
Settings:
Results:
All clear, no errors found