add message and comment

comment/serializers.py

@@ -0,0 +1,19 @@
+from comment.models import Comment
+from utils.api import serializers
+
+
+class CreateCommentSerializer(serializers.Serializer):
+    problem_id = serializers.IntegerField()
+    submission_id = serializers.CharField(max_length=32, allow_null=True)
+    problem_solved = serializers.BooleanField()
+    language = serializers.CharField(max_length=10, allow_null=True)
+    description_rating = serializers.IntegerField()
+    difficulty_rating = serializers.IntegerField()
+    comprehensive_rating = serializers.IntegerField()
+    content = serializers.CharField()
+
+
+class CommentSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Comment
+        fields = "__all__"