New changes

app/models.py

@@ -1,4 +1,5 @@
 from django.db import models
+from django.conf import settings
 
 
 class Recipe(models.Model):
@@ -9,3 +10,20 @@ class Recipe(models.Model):
 
     def __str__(self):
         return self.title
+
+
+class RecipeRating(models.Model):
+    recipe = models.ForeignKey(
+        Recipe, on_delete=models.CASCADE, related_name="ratings"
+    )
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL, on_delete=models.CASCADE
+    )
+    stars = models.PositiveSmallIntegerField(
+        choices=[(i, f"{i} star{'s' if i>1 else ''}") for i in range(1, 6)]
+    )
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        unique_together = ("recipe", "user")
+        ordering = ["-created_at"]

app/serializers.py

@@ -1,9 +1,18 @@
 from rest_framework import serializers
-
-from .models import Recipe
-
+from .models import Recipe, RecipeRating
 
 class RecipeSerializer(serializers.ModelSerializer):
     class Meta:
         model = Recipe
         fields = ["id", "title", "description", "time_minutes", "price"]
+
+class RecipeRatingSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = RecipeRating
+        fields = ["id", "stars", "created_at"]
+        read_only_fields = ["id", "created_at"]
+
+    def validate_stars(self, value):
+        if not (1 <= value <= 5):
+            raise serializers.ValidationError("Rating must be between 1 and 5.")
+        return value