1 files changed, 22 insertions, 0 deletions
diff --git a/pedidos-ya/app/opinion/serializers.py b/pedidos-ya/app/opinion/serializers.py
new file mode 100644
index 0000000..3aafdc7
--- /dev/null
+++ b/pedidos-ya/app/opinion/serializers.py
@@ -0,0 +1,22 @@
+from rest_framework import serializers
+
+from opinion.models import Opinion
+
+
+class OpinionSerializer(serializers.ModelSerializer):
+    """Serializer for the opinion objects"""
+    store_avg = serializers.SerializerMethodField()
+
+    def get_store_avg(self, obj):
+        opinions = Opinion.objects.filter(store_id=obj.store_id)
+        score_sum = 0
+
+        for item in opinions:
+            score_sum += item.score
+        return (score_sum / len(opinions))
+
+    class Meta:
+        model = Opinion
+        fields = ('id', 'user_id', 'store_id', 'purchase_id', 'comment',
+                  'score', 'created_at', 'updated_at', 'store_avg')
+        read_only_fields = ('id', 'created_at', 'updated_at', 'store_avg')