[REFACTOR] Add cosntraint unique pair (user, fasilitas) in Likes and Dislikes

informasi_fasilitas/migrations/0021_auto_20210601_0631.py

+# Generated by Django 3.1.7 on 2021-06-01 06:31
+
+from django.conf import settings
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('informasi_fasilitas', '0020_auto_20210601_0503'),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name='dislikes',
+            unique_together={('user', 'fasilitas')},
+        ),
+        migrations.AlterUniqueTogether(
+            name='likes',
+            unique_together={('user', 'fasilitas')},
+        ),
+    ]

informasi_fasilitas/models.py

@@ -114,12 +114,18 @@ class Likes(models.Model):
     fasilitas = models.ForeignKey(Fasilitas, on_delete=models.CASCADE)
     created = models.DateTimeField(auto_now_add=True)
 
+    class Meta:
+        unique_together = ('user', 'fasilitas')
+
 class Dislikes(models.Model):
     objects = models.Manager()
     user = models.ForeignKey(User, on_delete=models.CASCADE)
     fasilitas = models.ForeignKey(Fasilitas, on_delete=models.CASCADE)
     created = models.DateTimeField(auto_now_add=True)
 
+    class Meta:
+        unique_together = ('user', 'fasilitas')
+
 class KomentarKegiatan(models.Model):
     objects = models.Manager()
     user = models.ForeignKey(User, on_delete=models.CASCADE)