From 3099e5579b97f6000fce2255a59eb4dff338bcb3 Mon Sep 17 00:00:00 2001
From: Anushka Weerasooriya <Nushbox@gmail.com>
Date: Mon, 9 Mar 2026 23:51:16 +0000
Subject: [PATCH] Add recipe rating model & serializer with validation

---
 app/models.py      | 18 ++++++++++++++++++
 app/serializers.py | 15 ++++++++++++---
 2 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/app/models.py b/app/models.py
index a3429ca..5165417 100644
--- a/app/models.py
+++ b/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"]
\ No newline at end of file
diff --git a/app/serializers.py b/app/serializers.py
index ea8a3de..81010f1 100644
--- a/app/serializers.py
+++ b/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
\ No newline at end of file